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Öğe A RARE ENTITY OF ACQUIRED IDIOPATHIC GENERALISED ANHIDROSIS WHICH HAS BEEN SUCCESSFULLY TREATED WITH PULSE STEROID THERAPY: DOES THE HISTOPATHOLOGY PREDICT THE TREATMENT RESPONSE?(Literatura Medica, 2020) Oktem, Ece Ozdemir; Cankaya, Seyda; Uykur, Abdullah Burak; Erdem, Nazan Simsek; Yulug, BurakAcquired idiopathic generalised anhidrosis is an uncommon sweating disorder characterized by loss of sweating in the absence of any neurologic, metabolic or sweat gland abnormalities. Although some possible immunological and structural mechanisms have been proposed for this rare entity, the definitive pathophysiology is still unclear. Despite some successfully treated cases with systemic corticosteroid application, the dose and route of steroid application are controversial. Here, we present a 41-year-old man with lack of generalised sweating who has been successfully treated with high dose pulse intravenous prednisolone. We have discussed his clinical and histopathological findings as well as the treatment options in view of the current literature.Öğe A structural and resting-state functional connectivity investigation of the pulvinar in elderly individuals and Alzheimer's disease patients(Wiley, 2023) Velioglu, Halil Aziz; Ayyildiz, Behcet; Ayyildiz, Sevilay; Sutcubasi, Bernis; Hanoglu, Lutfu; Bayraktaroglu, Zubeyir; Yulug, BurakIn Alzheimer's disease (AD), structural and functional changes in the brain may give rise to disruption of specific cognitive functions. The aim of this study is to investigate the functional connectivity alterations in the pulvinar's subdivisions and total pulvinar voxel-based morphometry (VBM) changes in individuals with AD and healthy controls. A seed-based functional connectivity analysis was applied to the anterior, inferior, lateral, and medial pulvinar in each hemisphere. Furthermore, VBM analysis was carried out to compare gray matter (GM) volume differences in the pulvinar and thalamus between the two groups. Connectivity analysis revealed that the pulvinar subdivisions had decreased connectivity in individuals with AD. In addition, the pulvinar and thalamus in each hemisphere were significantly smaller in the AD group. The pulvinar may have a role in AD-related cognitive impairments and the intrinsic connectivity network changes and GM loss in pulvinar subdivisions suggest the cognitive deterioration occurring in those with AD. HighlightsThe pulvinar may play a role in pathophysiology of cognitive impairments in those with Alzheimer's disease (AD).Decreased structural volume and functional connectivity were found in patients with AD.The inferior pulvinar is functionally the most affected subdivision by AD compared to the others.Öğe Brain temperature in healthy and diseased conditions: A review on the special implications of MRS for monitoring brain temperature(Elsevier France-Editions Scientifiques Medicales Elsevier, 2023) Yulug, Burak; Velioglu, Halil Aziz; Sayman, Dila; Cankaya, Seyda; Hanoglu, LutfuBrain temperature determines not only an individual's cognitive functionality but also the prognosis and mor-tality rates of many brain diseases. More specifically, brain temperature not only changes in response to different physiological events like yawning and stretching, but also plays a significant pathophysiological role in a number of neurological and neuropsychiatric illnesses. Here, we have outlined the function of brain hyperthermia in both diseased and healthy states, focusing particularly on the amyloid beta aggregation in Alzheimer's disease.Öğe Cavernous sinus thrombosis due to mucor infection of ethmoid sinus(Galenos Publ House, 2024) Cankaya, Seyda; Cetin, Bahar Bakir; Oktem, Ece Ozdemir; Ozsimsek, Ahmet; Lakadamyali, Hatice; Yulug, Burak[Abstract Not Available]Öğe Chemogenetic inhibition of MCH neurons does not alter memory performance in mice(Elsevier France-Editions Scientifiques Medicales Elsevier, 2022) Mutlu-Burnaz, Ozlem; Yulug, Burak; Oncul, Merve; Celik, Esref; Atasoy, Nilufer Sayar; Cankaya, Seyda; Hanoglu, LutfuMemory storage in the brain is one of the most extensively studied subjects in neuroscience. However, due to the highly complex structure of the memory-related systems in the brain, the mystery remains unsolved. Consoli-dation is one of the most important parts of the memory process, and one that can be affected by numerous neurodegenerative diseases. Hypothalamic melanin-concentrating hormone (MCH) neuronal activity has been of particular interest to researchers in terms of the association between sleep, neurodegenerative diseases, and memory consolidation. We used Pmch-Cre animals to investigate the role of MCH neuronal activity in memory consolidation. In order to observe the differences in memory consolidation, we chemogenetically inhibited MCH neurons using the DREADD method and measured hippocampus-dependent memory performance with a novel object recognition test applicable to early memory impairment in Alzheimer's disease. Our results revealed no significant improvement or worsening with MCH inhibition, suggesting that the role of MCH should now be evaluated in a wider setting.Öğe Cognitive impairment in tension-type headache is associated with altered hippocampal functional connectivity(Cell Press, 2025) Yulug, Burak; Yalcinkaya, Ali; Safa, Shair Shah; Karakus, Ayse; Sayman, Dila; Cankaya, Seyda; Sayman, CeyhunTension-type headache (TTH) is a widespread primary headache disorder that causes mild to moderate pain, which may be seen together with cognitive deficits. It is unclear if TTH-linked cognitive impairment is associated with functional alterations. Seventy-five participants were enrolled in the study. Mini Mental State Evaluation (MMSE) and Montreal Cognition Assessment (MoCA) tests were applied to evaluate cognitive impairment. A neuroimaging analysis was applied to determine whether the hippocampus responsible for pain and cognition was affected in TTH patients. Our functional data revealed significant alterations in the connectivity of the subiculum, hippocampal fissure, and left whole hippocampus. Among the significant functional brain alterations observed, the right subiculum consistently interacted with MoCA scores and increased pain intensity. Our findings suggest that TTH patients with cognitive impairment may exhibit unique functional alterations in the hippocampus. This suggests a potential negative association between pain modulation and cognitive processes in the hippocampus that may be responsible for the increased risk of dementia in these patients.Öğe Comparison of Craniosacral Therapy and Myofascial Relaxation Techniques in People with Migraine Headache: A Randomized Controlled Study(Elsevier Inc, 2024) Araci, Ayca; Ozsimsek, Ahmet; Yulug, Burak; Karacay, ErtanObjective: The primary objective of this study was to investigate the impact of myofascial release and craniosacral therapy on the quality of life, pain levels, and range of motion (ROM) in patients with chronic migraine headaches. The secondary aim of this study was to develop a migraine treatment protocol using current craniosacral techniques. Methods: Patients with chronic migraine in the Neurology Department of ALKU Hospital were randomly allocated to 3 therapy groups: (1) Craniosacral Treatment Craniosacral Techniques (CST) + Medical Treatment (MT) (CST group) (n = 24), (2) myofascial treatment (MFT) (n = 24) + MT (MFT group), and (3) MT (control group) only (n = 26). Visual Analog Scale (VAS) for pain, FONSECA for temporomandibular disorder symptom intensity, 24 Hours Quality of Life Questionnaire Scales for quality of life, and Migraine Disability Assessment Score for impairment, Goniometer for Cervical ROM were used for the disability level. Follow-up scores were collected 4 times: at pretreatment (T0), immediately post-treatment (T1), 1 month (T2), and 3 months after treatment ended (T3). Results: Changes were found in T0 to T1 treatment results, VAS, and ROM angles between the groups. In intragroup evaluations, 24 Hours Quality of Life Questionnaire changes were observed only in the CST group at T0 to T1 to T2 periods (P = .011) while Migraine Disability Assessment Score scores were significantly changed in all groups. Significant changes were also observed in both VAS scores and FONSECA scores of the CST and MFT groups whereas VAS scores decreased significantly, especially in the T0 to T1 to T2 to T3 periods (P < .05). In the evaluation of FONSECA scores both within and between groups, it was observed that the most significant decrease was in the T2 period and there was a difference between the groups (P = .015). Conclusion: For the participants in this study, CST and MFT techniques reduced migraine headache, temporomandibular disorder level, drug consumption, and functional disability levels, and increased cervical region ROM. These results suggest that CST techniques could be considered in migraine treatment as one of the clinical practical applications within the framework of a certain protocol. (J Chiropr Med 2024;23;114-126)Öğe Decreased Facial Emotion Recognition in Elderly Patients With Hearing Loss Reflects Diminished Social Cognition(Sage Publications Inc, 2022) Saatci, Ozlem; Geden, Hakan; Gunes Ciftci, Halide; Ciftci, Zafer; Duz, Ozge Arici; Yulug, BurakObjective: The main objective of this research was to evaluate the correlation between the severity of hearing loss and the facial emotional recognition as a critical part of social cognition in elderly patients. Methods: The prospective study was comprised of 85 individuals. The participants were divided into 3 groups. The first group consisted of 30 subjects older than 65 years with a bilateral pure-tone average mean >30 dB HL. The second group consisted of 30 subjects older than 65 years with a PTA mean <= 30 dB HL. The third group consisted of 25 healthy subjects with ages ranging between 18 and 45 years and a PTA mean <= 25 dB HL. A Facial Emotion Identification Test and a Facial Emotion Discrimination Test were administered to all groups. Results: Elderly subjects with hearing loss performed significantly worse than the other 2 groups on the facial emotion identification and discrimination tests (P < .05). Appealingly, they identified a positive emotion, happiness, more accurately in comparison to the other negative emotions. Conclusions: Our results suggest that increased age might be associated with decreased facial emotion identification and discrimination scores, which could be deteriorated in the presence of significant hearing loss.Öğe Differentiating MCI from depression through verbal memory scores(Wiley, 2024) Cankaya, Seyda; Yalciner, Betul; Yilmaz, Melek Kandemir; Yulug, BurakINTRODUCTION: The present study aims to assess the differences between major depressive disorder (MDD) and mild cognitive impairment (MCI) in terms of verbal learning profile together with structural changes in the brain on magnetic resonance imaging (MRI) and to reveal predictive factors for MCI. METHODS: Fifty-six patients with MDD and 31 MCI subjects were assessed using the Turkish Verbal Memory Processes Test (VMPT). Brain MRI was used to evaluate sulcal atrophy (SA), ventricular atrophy, periventricular white matter hyperintensity (WMH), subcortical WMH, basal ganglia infarct, medial temporal lobe atrophy, and infratentorial infarct scores based on the Modified Visual MRI Rating Scale (MVMRS). The symptoms of depression were evaluated with the Beck Depression Inventory in both groups. Demographic factors, VMPT scores, and MVMRS scores between MDD and MCI groups were compared. Also, potential predictors of MCI were analyzed by binary logistic regression analyses. RESULTS: The total scores of VMPT and the scores of VMPT subgroups, including immediate memory, highest learning, total learning, and delayed recall, were significantly higher in the MDD groups compared to MCI patients (Mann-Whitney U, Student's t-test, p < 0.05), indicating that higher scores were associated with better memory. The total MVMRS score and a subgroup of MVMRS, the SA score, were significantly higher in MCI patients compared to the MDD group, suggesting more atrophic changes and a higher burden of infarction in MCI patients. In our statistical analyses, impaired immediate memory (p < 0.001; OR = 6.002; 95% CI: 1.996-18.042), increased SA (p = 0.008; OR = 1.522; 95% CI: 1.118-2.073), and education (p = 0.028; OR = 0.84; 95% CI: 0.719-0.981) were significant predictive values obtained through backward Wald elimination in the binary logistic regression model for detecting MCI. CONCLUSION: Our findings suggest that VMPT may potentially represent a novel neuropsychiatric test that might be combined with MRI-based morphometric evaluation methods, such as MVMRS.Öğe Dose-Dependent Effect of a New Biotin Compound in Hippocampal Remyelination in Rats(Springer, 2025) Yulug, Burak; Kilic, Ertugrul; Oguz, Tuba; Orhan, Cemal; Er, Besir; Tuzcu, Mehmet; Ozercan, Ibrahim HanifiDemyelination is commonly observed in neurodegenerative disorders, including multiple sclerosis (MS). Biotin supplementation is known to stabilize MS progression. To reduce the effective dose of biotin, we synthesized a new and superior form of biotin, a complex of magnesium ionically bound to biotin (MgB) and compared its dose-dependent effect with biotin alone after inducing demyelination using lysolecithin (LPC) in rats. Myelination was assessed using luxol fast blue staining and immunostaining against MBP protein, revealing that the most significant remyelination occurred in the MgB groups. Additionally, both biotin and MgB-treated animals showed dose-dependent improvements in spatial memory. Moreover, we detected a decrease in inflammatory proteins in both treatment groups, which was more prominent in high-dose MgB-treated animals and correlated with decreased expression of NF-kappa B p65, OP, and MMP-9 proteins. Further analysis of biotin-related proteins demonstrated that both biotin and, notably, MgB reversed the demyelination-dependent reduction of these proteins. Furthermore, biotin, particularly MgB, improved neuronal transmission proteins, Synapsin-1, PSD-93, and PSD-95. Additionally, both treatment groups exhibited increased BDNF, GAP43, and ICAM levels, with significant increments observed in high-dose MgB-treated animals. Increased GFAP, indicative of reactive gliosis, was observed in LPC-treated animals, and this effect was notably reversed by high-dose MgB treatment. The current data emphasize the dose-dependent beneficial effect on the remyelination process. Furthermore, the combination of biotin with Mg resulted in a more potent effect compared to biotin by itself. The strong influence of MgB encourages proof-of-concept studies using MgB in patients with MS.Öğe EGb 761 reduces Ca2+ influx and apoptosis after pentylenetetrazole treatment in a neuroblastoma cell line(Frontiers Media Sa, 2023) Ovey, Ishak Suat; Ozsimsek, Ahmet; Velioglu, Halil Aziz; Altay, Ozlem; Mardinoglu, Adil; Yulug, BurakBackground: Transient receptor potential (TRP) channels have been found to have significant implications in neuronal outgrowth, survival, inflammatory neurogenic pain, and various epileptogenic processes. Moreover, there is a growing body of evidence indicating that transient receptor potential (TRP) channels have a significant impact on epilepsy and its drug-resistant subtypes.Objective: We postulated that EGb 761 would modulate TRPA1 channels, thereby exhibiting anti-inflammatory and neuroprotective effects in a neuroblastoma cell line. Our rationale was to investigate the impact of EGb 761 in a controlled model of pentylenetetrazole-induced generalized epilepsy.Methodology: We evaluated the neuroprotective, antioxidant and anti-apoptotic effects of EGb 761 both before and after the pentylenetetrazole application in a neuroblastoma cell line. Specifically, we focused on the effects of EGB 761 on the activity of Transient receptor potential (TRP) channels.Results: EGb 761 applications both before and after the pentylenetetrazole incubation period reduced Ca release and restored apoptosis, ROS changes, mitochondrial depolarization and caspase levels, suggesting a prominent prophylactic and therapeutic effect of EGb 761 in the pentylenetetrazole-induced epileptogenesis process.Conclusion: Our basic mechanistic framework for elucidating the pathophysiological significance of fundamental ion mechanisms in a pentylenetetrazole treated neuroblastoma cell line provided compelling evidence for the favorable efficacy and safety profile of Egb 761 in human-relevant in vitro model of epilepsy. To the best of our knowledge, this is the first study to investigate the combined effects of EGb 761 and pentylenetetrazole on TRP channels and measure their activation level in a relevant model of human epileptic diseases.Öğe Exosomes: A missing link between chronic systemic inflammation and Alzheimer's disease?(Elsevier France-Editions Scientifiques Medicales Elsevier, 2023) Ozansoy, Mehmet; Mikati, Houda; Velioglu, Halil Aziz; Yulug, BurakExosomes are potent mediators of physiological and pathological processes. In Alzheimer's disease and in-flammatory disorders, due to exosomes' distinctive ability to cross the blood-brain barrier, a bidirectional communication between the periphery and the central nervous system exists. Since exosomes can carry various biochemical molecules, this review investigates the role of exosomes as possible mediators between chronic systemic inflammatory diseases and Alzheimer's disease. Exosomes carry pro-inflammatory molecules generated in the periphery, travel to the central nervous system, and target glial and neuronal cells. Microglia and astro-cytes then become activated, initiating chronic neuroinflammation. As the aging brain is more susceptible to such changes, this state of neuroinflammation can stimulate neuropathologies, impair amyloid-beta clearance capa-bilities, and generate dysregulated microRNAs that alter the expression of genes critical in Alzheimer's disease pathology. These processes, individually and collectively, become significant risk factors for the development of Alzheimer's disease.Öğe Exploring Cognitive Impairment in Patients With Bilateral Capsular Genu Lesions(Amer Psychiatric Publishing, Inc, 2022) Kumral, Emre; Cetin, Fatma Ece; Ozdemir, Huseyin Nezih; Cankaya, Seyda; Schabitz, Wolf-Rudiger; Yulug, BurakObjective: The authors investigated for presence of cognitive impairment after occurrence of bilateral lesions of the genu of the internal capsule (GIC). Clinical and neuropsychological features of unilateral GIC lesions have previously been studied, but the cognitive profile of bilateral lesions of the GIC has not been fully explored. Methods: An investigation was conducted of neurocognitive deficits and computerized tomography MRI findings among 4,200 stroke patients with bilateral GIC involvement who were admitted to the hospital between January 2010 and October 2018. Results: Eight patients with bilateral lesions of the capsular genu were identified and their data analyzed. Overall, behavioral and cognitive dysfunction were characterized by impairment of frontal, memory, and executive functions. Attention and abstraction were present among all eight patients (100%); apathy, abulia, and executive dysfunctions, among seven (87.5%); global mental dysfunction and planning deficits, among six (75.0%); short-term verbal memory deficits and language dysfunctions, among five (62.5%); long-term verbal memory deficits, among four (50.0%); and spatial memory deficits, reading, writing, counting dysfunctions, and anarthria, among two (25.0%). Four of the patients (50.0%) without a history of cognitive disorder showed severe mental deterioration compatible with the clinical picture of dementia. A clinical picture of dementia was still present in these patients 6 months after stroke. Conclusions: Bilateral lesions of the capsular genu appearing either simultaneously or at different times were significantly associated with executive dysfunctions.Öğe High dose corticosteroid causes bradycardia in patients with multiple sclerosis(Wiley, 2024) Sayman, Ceyhun; Celik, Humeyra; Cankaya, Seyda; Oktem, Ece Ozdemir; Yulug, Burak[Abstract Not Available]Öğe Infection with COVID-19 is no longer a public emergency: But what about degenerative dementia?(Wiley, 2023) Yulug, Burak; Ayyildiz, Behcet; Ayyildiz, Sevilay; Sayman, Dila; Salar, Ali Behram; Cankaya, Seyda; Ozdemir Oktem, EceAlthough no longer considered a public health threat, post-COVID cognitive syndrome continues to impact on a considerable proportion of individuals who were infected with COVID-19. Recent studies have also suggested that COVID may be represent a critical risk factor for the development of Alzheimer's disease (AD). We compared 17 COVID patients with 20 controls and evaluated the effects of COVID-19 on general cognitive performance, hippocampal volume, and connections using structural and seed-based connectivity analysis. We showed that COVID patients exhibited considerably worse cognitive functioning and increased hippocampal connectivity supported by the strong correlation between hippocampal connectivity and cognitive scores. Our findings of higher hippocampal connectivity with no observable hippocampal morphological changes even in mild COVID cases may be represent evidence of a prestructural compensatory mechanism for stimulating additional neuronal resources to combat cognitive dysfunction as recently shown for the prodromal stages of degenerative cognitive disorders. Our findings may be also important in light of recent data showing that other viral infections as well as COVID may constitute a critical risk factor for the development of AD. To our knowledge, this is the first study that investigated network differences in COVID patients, with a particular focus on compensatory hippocampal connectivity.Öğe Multi-omics analysis reveals the key factors involved in the severity of the Alzheimer's disease(Bmc, 2024) Meng, Lingqi; Jin, Han; Yulug, Burak; Altay, Ozlem; Li, Xiangyu; Hanoglu, Lutfu; Cankaya, SeydaAlzheimer's disease (AD) is a debilitating neurodegenerative disorder with a global impact, yet its pathogenesis remains poorly understood. While age, metabolic abnormalities, and accumulation of neurotoxic substances are potential risk factors for AD, their effects are confounded by other factors. To address this challenge, we first utilized multi-omics data from 87 well phenotyped AD patients and generated plasma proteomics and metabolomics data, as well as gut and saliva metagenomics data to investigate the molecular-level alterations accounting the host-microbiome interactions. Second, we analyzed individual omics data and identified the key parameters involved in the severity of the dementia in AD patients. Next, we employed Artificial Intelligence (AI) based models to predict AD severity based on the significantly altered features identified in each omics analysis. Based on our integrative analysis, we found the clinical relevance of plasma proteins, including SKAP1 and NEFL, plasma metabolites including homovanillate and glutamate, and Paraprevotella clara in gut microbiome in predicting the AD severity. Finally, we validated the predictive power of our AI based models by generating additional multi-omics data from the same group of AD patients by following up for 3 months. Hence, we observed that these results may have important implications for the development of potential diagnostic and therapeutic approaches for AD patients.Öğe Multi-omics characterization of improved cognitive functions in Parkinson's disease patients after the combined metabolic activator treatment: a randomized, double-blinded, placebo-controlled phase II trial(Oxford Univ Press, 2025) Yulug, Burak; Altay, Ozlem; Li, Xiangyu; Hanoglu, Lutfu; Cankaya, Seyda; Velioglu, Halil A.; Lam, SimonParkinson's disease is primarily marked by mitochondrial dysfunction and metabolic abnormalities. We recently reported that the combined metabolic activators improved the immunohistochemical parameters and behavioural functions in Parkinson's disease and Alzheimer's disease animal models and the cognitive functions in Alzheimer's disease patients. These metabolic activators serve as the precursors of nicotinamide adenine dinucleotide and glutathione, and they can be used to activate mitochondrial metabolism and eventually treat mitochondrial dysfunction. Here, we designed a randomized, double-blinded, placebo-controlled phase II study in Parkinson's disease patients with 84 days combined metabolic activator administration. A single dose of combined metabolic activator contains L-serine (12.35 g), N-acetyl-L-cysteine (2.55 g), nicotinamide riboside (1 g) and L-carnitine tartrate (3.73 g). Patients were administered either one dose of combined metabolic activator or a placebo daily for the initial 28 days, followed by twice-daily dosing for the next 56 days. The main goal of the study was to evaluate the clinical impact on motor functions using the Unified Parkinson's Disease Rating Scale and to determine the safety and tolerability of combined metabolic activator. A secondary objective was to assess cognitive functions utilizing the Montreal Cognitive Assessment and to analyse brain activity through functional MRI. We also performed comprehensive plasma metabolomics and proteomics analysis for detailed characterization of Parkinson's disease patients who participated in the study. Although no improvement in motor functions was observed, cognitive function was shown to be significantly improved (P < 0.0000) in Parkinson's disease patients treated with the combined metabolic activator group over 84 days, whereas no such improvement was noted in the placebo group (P > 0.05). Moreover, a significant reduction (P = 0.001) in Montreal Cognitive Assessment scores was observed in the combined metabolic activator group, with no decline (P > 0.05) in the placebo group among severe Parkinson's disease patients with lower baseline Montreal Cognitive Assessment scores. We showed that improvement in cognition was associated with critical brain network alterations based on functional MRI analysis, especially relevant to areas with cognitive functions in the brain. Finally, through a comprehensive multi-omics analysis, we elucidated the molecular mechanisms underlying cognitive improvements observed in Parkinson's disease patients. Our results show that combined metabolic activator administration leads to enhanced cognitive function and improved metabolic health in Parkinson's disease patients as recently shown in Alzheimer's disease patients. The trial was registered in ClinicalTrials.gov NCT04044131 (17 July 2019, https://clinicaltrials.gov/ct2/show/NCT04044131).Öğe Neuroimaging-Guided Transcranial Magnetic and Direct Current Stimulation in MCI: Toward an Individual, Effective and Disease-Modifying Treatment(Sage Publications Inc, 2023) Hanoglu, Lutfu; Velioglu, Halil Aziz; Hanoglu, Taha; Yulug, BurakThe therapeutic approaches currently applied in Alzheimer's disease (AD) and similar neurodegenerative diseases are essentially based on pharmacological strategies. However, despite intensive research, the effectiveness of these treatments is limited to transient symptomatic effects, and they are still far from exhibiting a true therapeutic effect capable of altering prognosis. The lack of success of such pharmacotherapy-based protocols may be derived from the cases in the majority of trials being too advanced to benefit significantly in therapeutic terms at the clinical level. For neurodegenerative diseases, mild cognitive impairment (MCI) may be an early stage of the disease continuum, including Alzheimer's. Noninvasive brain stimulation (NIBS) techniques have been developed to modulate plasticity in the human cortex in the last few decades. NIBS techniques have made it possible to obtain unique findings concerning brain functions, and design novel approaches to treat various neurological and psychiatric conditions. In addition, its synaptic and cellular neurobiological effects, NIBS is an attractive treatment option in the early phases of neurodegenerative diseases, such as MCI, with its beneficial modifying effects on cellular neuroplasticity. However, there is still insufficient evidence about the potential positive clinical effects of NIBS on MCI. Furthermore, the huge variability of the clinical effects of NIBS limits its use. In this article, we reviewed the combinatory approach of NIBS with various neuroimaging and electrophysiological methods. Such methodologies may provide a new horizon to the path for personalized treatment, including a more individualized pathophysiology approach which might even define new specific targets for specific symptoms of neurodegenerations.Öğe Parietal memory network and memory encoding versus retrieval impairments in PD-MCI patients: A hippocampal volume and cortical thickness study(Wiley, 2024) Sahin, Serhat; Velioglu, Halil Aziz; Yulug, Burak; Bayraktaroglu, Zubeyir; Yildirim, Suleyman; Hanoglu, LutfuObjective: The pathophysiology behind memory impairment in Parkinson's Disease Mild Cognitive Impairment (PD-MCI) is unclear. This study aims to investigate the hippocampal and cortical atrophy patterns in PD-MCI patients with different types of memory impairments, categorized as Retrieval Failure (RF) and Encoding Failure (EF). Methods: The study included 16 healthy controls (HC) and 34 PD-MCI patients, divided into RF (N = 18) and EF (N = 16) groups based on their Verbal Memory Processes Test (VMPT) scores, including spontaneous recall, recognition, and Index of Sensitivity to Cueing (ISC). Hippocampal subfields and cortical thicknesses were measured using the FreeSurfer software for automatic segmentation. Results: Compared to the HC group, the EF group exhibited significant atrophy in the left lateral occipital region and the right caudal middle frontal, superior temporal, and inferior temporal regions (p < 0.05). The RF group displayed significant atrophy in the left lateral occipital, middle temporal, and precentral regions, as well as the right pars orbitalis and superior frontal regions (p < 0.05). Hippocampal subfield analysis revealed distinct volume differences between HC-EF and RF-EF groups, with significant reductions in the CA1, CA3, and CA4 subregions in the EF group, but no differences between HC and RF groups (p > 0.05). Conclusion: Gray matter atrophy patterns differ in PD-MCI patients with encoding and retrieval memory impairments. The significant hippocampal atrophy in the EF group, particularly in the CA subregions, highlights its potential role in disease progression and memory decline. Additionally, the convergence of atrophy in the lateral occipital cortex across both RF and EF groups suggests the involvement of the Parietal Memory Network (PMN) in PD-related memory impairment.Öğe Prognostic Factors For Functional Outcome in Patients with Mesencephalic Hemorrhage(Turkish Neuropsychiatry Assoc-Turk Noropsikiyatri Dernegi, 2023) Oktem, Ece Ozdemir; Kumral, Emre; Bayam, Fatma Ece; Ozsimsek, Ahmet; Dorukoglu, Mehmet Mesut; Cankaya, Seyda; Yulug, BurakIntroduction: Mesencephalic hemorrhage (MH) is a rare presentation of spontaneous intraparenchymal hemorrhage. This study aims to evaluate prognostic parameters of the MH outcome. Methods: We conducted an extensive search in the literature for cases with spontaneous, isolated mesencephalic hemorrhage. The study was conducted according to the statement of Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA). Sixty-two eligible cases have been reported in the literature as proven by CT or MRI, and to these, we added six cases confirmed by MRI. The modified Rankin Scale (mRS) was dichotomized into two groups as the favorable outcome (FO; score, 0-2) and unfavorable outcome (UO; score, 3-6). Results: Of the 68 patients studied, 26 (38%) presented with normal consciousness, 22 (32%) with lethargy, and 20 (29%) with stupor or coma. There was no cause of hemorrhage in 26 (65%) patients with FO and 12 (43%) with UO (p=0.059). In univariate analyses, neither arteriovenous malformations (p=0.33) nor cavernomas (p=0.19) were associated with outcome. Multiple logistic regression analysis revealed that hypertension (OR, 51.22; CI95%, 1.92-1370.24; P=0.019), consciousness (OR, 133.54; CI95%, 1.61-1113.3; P=0.03), NIHSS at admission (OR, 57.23; CI95%, 2.87-1141.2; p=0.008), and ventrodorsal hemorrhage size (=1 cm) (OR, 61.83; CI95%, 2.15-1779.2; p=0.016) were significantly associated with UO. Three months after stroke, 40 patients (59%) had FO, 28 (41%) had UO, and 8 (12%) died. Conclusion: These results suggest that ventrodorsal size of hemorrhage and clinical severity at stroke onset are possible predictors of functional outcome after mesencephalic hemorrhage.
