Noropsikiyatri Arsivi-Archives of Neuropsychiatry最新文献

Introduction: It has been shown by numerous investigations that the occipitotemporal area has a particular object perception area called the lateral occipital complex, which is composed of lateral occipital (LO) and posterior fusiform (pF) cortices. The aim of this study is to examine the intrinsic functional connectivity (iFC) patterns of the object-selective LO and pF regions in order to shed light on the underlying neural mechanisms of object recognition.

Methods: 15 healthy participants were included in the study. A standard localizer task was used to identify LO and pF regions. Magnetic resonance imaging (MRI) data were collected using two different imaging protocols: high-resolution anatomical image and functional MRI (fMRI) data. Data preprocessing steps were carried out in accordance with standard procedures. After determining the LO and pF regions with activation analyses on the task-based fMRI data, the iFCs of these regions were investigated with functional connectivity analyses carried out on the resting-state fMRI recording.

Results: iFC analyzes revealed that LO and pF regions have different connectivity patterns. Lateral occipital had a widely distributed connectivity network, whereas pF showed a more localized connectivity pattern. Lateral occipital had more extensive occipitotemporal, occipitoparietal and motor connections compared to pF. In contrast to this distribution pattern, the connections of the right and left LO were generally concentrated on the ipsilateral sides, while the connections of the pF were bilateral.

Conclusion: The results of the study revealed complex iFC patterns of the LO and pF differentiating their functional roles in object perception/recognition. While the pF revealed bilaterally distributed iFC along the ventral visual stream, the extensive and lateralized iFC of the LO suggests its role in integrating visual information including object-related attention and action recognition.

Distal hereditary motor neuropathies (dHMNs), also named as distal spinal muscular atrophy, are a group of disorders that cause degeneration of motor nerves. Currently, only 15% to 32.5% of patients with dHMN have been genetically identified. The most common cause of dHMNs gene mutations is HSPB1 mutation. In HSPB1 mutation, which is also one of the myopathogens via satellite cell pathology, dHMNS may coexist with neuromuscular junction disorder, motor neuron disease, satellite cell dysfunction and therefore myopathic findings. No case of myopathy and myotonia with HSPB1 mutation has been reported in the literature yet. We present a case with electrophysiologic findings in HSPB1 mutation by discussing the possible mechanisms underlying myotonic discharges and myopathic findings.

In the very early days of Guillain-Barré syndrome (GBS), electrophysiological findings may be scarce but mostly required for the substantiation of nerve and/or nerve root pathology. Abnormal F-waves, absence of H reflexes, multiple A-waves and sural sparing are the best-known early findings of the disease. In this report, we present two cases with GBS in whom the early electrophysiology revealed discharges following the compound muscle action potentials. We propose that these discharges may be another early sign of GBS and may reflect early peripheral nerve demyelination and/or hyperexcitability.

Introduction: Schizophrenia is both a neurodevelopmental and neurodegenerative disorder that manifests a complex spectrum of symptoms, significantly impacting mental health. In early-onset psychosis, similar to adult studies, neuroimaging focuses on ventral prefrontal cortical areas and posterior temporoparietal regions, crucial for understanding the neurodevelopmental mechanisms of these conditions in such drug-naive patients. This enables magnetic resonance imaging to be acquired before significant neurodegenerative changes occur, in contrast to chronic schizophrenia cases. Therefore, our study helps advance understanding of disease mechanisms in this patient population.

Methods: We recruited forty-one subjects (17 females, 24 males; mean age=16 years; age range: 12-17 years) who were diagnosed with first-episode psychosis (FEP). We examined the relationship between gene and environmental risk scores (GERS) and whole-brain gray matter (GM) volumes through voxel-based morphometry (VBM).

Results: We found a positive correlation between GM volumes of the left medial frontal gyrus, right anterior prefrontal cortex, left superior frontal gyrus, left operculum of the inferior frontal gyrus, left superior parietal lobe, and left supramarginal gyrus with the GERS. We found a negative correlation between GM volumes of the left superior frontal gyrus, left cerebellum, and the GERS.

Conclusion: Our findings contribute to the understanding of structural abnormalities associated with schizophrenia, aligning with existing literature highlighting GM changes in frontal, parietal, and temporal cortices, as well as limbic structures. Our study underscores the importance of integrating structural and functional neuroimaging approaches to elucidate the pathophysiology of early-onset schizophrenia, emphasizing regions like the dorsolateral prefrontal cortex, ventrolateral prefrontal cortex, and posterior parietal areas.

Introduction: The present study aimed to compare the Parietal Lobe (PL) volumes and Cancellation Test (CT) performances of euthymic patients with Bipolar Disorder-1 (BD) and Major Depressive Disorder (MDD), and healthy controls.

Methods: The present study included 63 participants in three groups; two patient groups in remission involving patients with BD and MDD diagnosed according to DSM-5 and a control group with healthy individuals. Sociodemographic Data Form, CT, and Hand Preference Questionnaire were applied to all participants. Participant PL volumes were measured with the Cloud-Based Brain Magnetic Resonance Image Segmentation - Parcellation System.

Results: Both patient groups exhibited lower PL volume when compared to the control group, and there was no difference between the patient groups based on PL volume. It was determined that MDD and BB patients scored less in the CT when compared to the control group. There was a weak correlation between right and left PL volumes and CT performances.

Conclusion: The present study findings demonstrated that BD and MDD patients in remission exhibited lower PL volume and CT performance when compared to healthy controls, emphasizing that PL could be structurally and functionally significant in the pathophysiology of mood disorders.

Introduction: Bipolar disorder (BD) is a chronic disorder associated with significant psychiatric morbidity and disability. Recent research has linked inflammatory processes to the pathology of BD. Resolvin D1 (RvD1), an anti-inflammatory molecule derived from eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), has been shown to inhibit apoptosis and neuroinflammation, and promote neurogenesis. This study aims to determine changes in serum RvD1 levels between acute episode and euthymic periods in patients with BD and their association with inflammatory and metabolic syndrome (MetS) parameters.

Methods: This prospective clinical study was conducted with patients diagnosed with BD-I according to SCID-5. Patients whose serum RvD1 levels were assessed during manic and depressive episodes in the previous study were invited to return to the study after at least 8 weeks, when they had reached the euthymic period. Blood samples for RvD1, C-reactive protein (CRP), and hemogram tests were collected during both acute episodes and remission periods.

Results: The study included 32 patients in manic episodes, 27 in depressive episodes, and 41 healthy controls, with no significant age difference among the groups. RvD1 levels decreased significantly from manic episodes to complete remission period (p=0.017, z=-2.391) during follow-up. The decrease from depression to remission was not statistically significant. Serum RvD1 levels in patients with depressive episodes in remission remained high in the control group (p=0.581, z=-0.553). During the follow-up period, white blood cell (p=0.009, z=-2.606) and neutrophil (p=0.007, z=-2.693) in mania period and CRP values in depression period (p=0.004, z=-2.880) were found to have decreased statistically.

Conclusions: The study indicates that serum RvD1 levels are elevated during manic and depressive episodes in BD patients compared to healthy controls and decrease significantly during the remission period in patients with manic episode. We propose the potential utility of RvD1 as a diagnostic marker for identifying manic and depressive states. We can assume that there is an inflammatory process in BD in which RvD1 also plays a role. Further research is needed to explore the therapeutic potential of targeting RvD1 pathways in BD treatment.

Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy (CADASIL) is a small vessel disease. It is an autosomal dominant inherited disease caused by a mutation in the Notch3 gene. Clinically, it usually presents with recurrent transient ischemic attacks, strokes, vascular dementia, migraine with aura, cognitive impairments and psychiatric symptoms. Cranial MRI is the most useful imaging modality to demonstrate the characteristic radiological findings of CADASIL and gene analysis is the gold standard for diagnosis. Although the clinical manifestations are mainly neurological, CADASIL can also present with psychiatric disorders. Psychiatric disorders are one of the main clinical manifestations of the disease, with a prevalence rate ranging from 20 to 41%. Among psychiatric disorders, mood disorders are the most commonly reported, and other psychiatric diagnoses include psychotic disorders, anxiety disorders, adjustment disorder, personality disorders, behavioral disorders, substance dependence and abuse. In this case report, a paitent with CADASIL presenting with obsessive-compulsive disorder at a relatively young age will be presented.

Introduction: This study was designed to explore the relationship between retinal nerve fiber layer (RNFL) thickness and cognition in Idiopathic Parkinson's disease (IPD) patients without visual symptoms or diagnosis of dementia.

Methods: Groups of patients with idiopathic Parkinson's disease and healthy controls were compared ophthalmologically using optical coherence tomography (OCT) and cognitively through neuropsychological tests.

Results: The findings highlighted a pronounced RNFL thinning, especially in the right nasal inferior quadrant of IPD patients compared to the control group. Almost half (47%) of the subjects in the IPD group exhibited issues in one or multiple subcomponents of Addenbrooke's Cognitive Examination-Revised (ACE-R). At the same time, the study suggested that effects in the visuospatial domain may be associated with disease severity in IPD patients. However, the investigation could not establish a direct association between the severity or duration of the disease and OCT measurements. A correlation was observed between certain ACE-R scores and some RNFL quadrants.

Conclusion: In conclusion, the inception phases of IPD are characterized by discernable visual pathologies and cognitive anomalies. The thinning of the RNFL, which can be identified through OCT, might serve as a pivotal tool for tracking the early progression of IPD and formulating intervention strategies. That being said, more comprehensive studies are essential to wholly understand OCT's role in the early diagnosis and monitoring of IPD.

Introduction: Decision-making and emotion recognition are two fundamental themes in social cognition. Disorders in these areas can lead to interpersonal, psychosocial, and legal problems for the individual and society. The likelihood of consequent aggression and crime makes them foci of forensic psychiatry over time. In this study, two developmental disorders that have a clear relationship with crime, that are antisocial personality disorder (ASPD), and psychopathy are investigated for their relationship with these social cognitive deficits.

Methods: The present study involved 23 male prison inmates who were diagnosed with both antisocial personality disorder and psychopathy, as well as 23 control participants who were matched for age, gender, and level of education. Following the psychiatric interview, Reading the Mind in the Eyes Test (RMET), the Iowa Gambling Test (IGT), Toronto Alexithymia Scale (TAS), Defense Styles Questionnaire (DSQ), Childhood Psychic Trauma Scale (CTQ), Hare Psychopathy Checklist (PCL-R) were administered to all participants.

Results: The results of the study showed that ASPD group performed statistically worse than healthy controls in TAS, CTQ, all items of DSQ, PCL-R Factor 1 and 2, and all the IGT scores (p<0.05). There were no statistically significant difference between in the RMET test performances.

Conclusion: These results suggest that ASPD and psychopathy lead to impaired decision-making behaviors due to the inability to recognize one's own emotions and impulsivity, and that these characteristics play a critical role in the criminal behavior of individuals. In addition, contrary to expectations, the results of affective theory of mind assessed with the RMET showed similar characteristics in homicide convicts and healthy controls. These data indicate the need for further research in the field of forensic psychiatry.