Altered brain gyrification in deficit and non-deficit schizophrenia

2018 ◽  
Vol 49 (4) ◽  
pp. 573-580 ◽  
Author(s):  
Yoichiro Takayanagi ◽  
Daiki Sasabayashi ◽  
Tsutomu Takahashi ◽  
Yuko Komori ◽  
Atsushi Furuichi ◽  
...  
Keyword(s):  
Negative Symptoms ◽  
Clinical Manifestations ◽  
Anterior Cingulate ◽  
Deficit Syndrome ◽  
Potential Marker ◽  
Duration Of Illness ◽  
Gyrification Index ◽  
Neurodevelopmental Abnormalities ◽  
Cingulate Gyri

AbstractBackgroundPatients with the deficit form of schizophrenia (D-SZ) are characterized by severe primary negative symptoms and differ from patients with the non-deficit form of schizophrenia (ND-SZ) in several aspects. No study has measured brain gyrification, which is a potential marker of neurodevelopment, in D-SZ and ND-SZ.MethodsWe obtained magnetic resonance scans from 135 schizophrenia patients and 50 healthy controls. The proxy scale for deficit syndrome (PDS) was used for the classification of D-SZ and ND-SZ. The local gyrification index (LGI) of the entire cortex was measured using FreeSurfer. Thirty-seven D-SZ and 36 ND-SZ patients were included in the LGI analyses. We compared LGI across the groups.ResultsSZ patients exhibited hyper-gyral patterns in the bilateral dorsal medial prefrontal and ventromedial prefrontal cortices, bilateral anterior cingulate gyri and right lateral parietal/occipital cortices as compared with HCs. Although patients with D-SZ or ND-SZ had higher LGI in similar regions compared with HC, the hyper-gyral patterns were broader in ND-SZ. ND-SZ patients exhibited a significantly higher LGI in the left inferior parietal lobule relative to D-SZ patients. Duration of illness inversely associated with LGI in broad regions only among ND-SZ patients.ConclusionsThe common hyper-gyral patterns among D-SZ and ND-SZ suggest that D-SZ and ND-SZ may share neurodevelopmental abnormalities. The different degrees of cortical gyrification seen in the left parietal regions, and the distinct correlation between illness chronicity and LGI observed in the prefrontal and insular cortices may be related to the differences in the clinical manifestations among D-SZ and ND-SZ.

scholarly journals Reduced cortical gyrification in the posteromedial cortex in unaffected relatives of schizophrenia patients with high genetic loading

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Inkyung Park ◽  
Minah Kim ◽  
Tae Young Lee ◽  
Wu Jeong Hwang ◽  
Yoo Bin Kwak ◽  
...  
Keyword(s):  
Genetic Risk ◽  
Resonance Imaging ◽  
Degree Relative ◽  
Genetic Vulnerability ◽  
First Degree Relatives ◽  
Weighted Magnetic Resonance Imaging ◽  
Gyrification Index ◽  
Neurodevelopmental Abnormalities ◽  
Genetic Loading ◽  
Cingulate Gyri

AbstractAlthough abnormal cortical gyrification has been consistently reported in patients with schizophrenia, whether gyrification abnormalities reflect a genetic risk for the disorder remains unknown. This study investigated differences in cortical gyrification between unaffected relatives (URs) with high genetic loading for schizophrenia and healthy controls (HCs) to identify potential genetic vulnerability markers. A total of 50 URs of schizophrenia patients and 50 matched HCs underwent T1-weighted magnetic resonance imaging to compare whole-brain gyrification using the local gyrification index (lGI). Then, the lGI clusters showing significant differences were compared between the UR subgroups based on the number of first-degree relatives with schizophrenia to identify the effect of genetic loading on cortical gyrification changes. The URs exhibited significantly lower cortical gyrification than the HCs in clusters including medial parieto-occipital and cingulate regions comprising the bilateral precuneus, cuneus, pericalcarine, lingual, isthmus cingulate, and posterior cingulate gyri. Moreover, URs who had two or more first-degree relatives with schizophrenia showed greater gyrification reductions in these clusters than those who had at least one first-degree relative with schizophrenia. Our findings of reduced gyrification in URs, which are consistent with accumulated evidence of hypogyria observed in regions showing patient-control differences in previous studies, highlight that such hypogyria in posteromedial regions may serve as a genetic vulnerability marker and reflect early neurodevelopmental abnormalities resulting from a genetic risk for schizophrenia.

Use of photodynamic therapy for photodamage skin (review of literature)

2019 ◽  
Vol 1 (7) ◽  
pp. 19-23
Author(s):  
S. I. Surkichin ◽  
N. V. Gryazeva ◽  
L. S. Kholupova ◽  
N. V. Bochkova
Keyword(s):  
Photodynamic Therapy ◽  
Comparative Evaluation ◽  
Clinical Manifestations ◽  
Light Sources ◽  
Review Of Literature ◽  
Photosensitizing Agents ◽  
Selection Of

The article provides an overview of the use of photodynamic therapy for photodamage of the skin. The causes, pathogenesis and clinical manifestations of skin photodamage are considered. The definition, principle of action of photodynamic therapy, including the sources of light used, the classification of photosensitizers and their main characteristics are given. Analyzed studies that show the effectiveness and comparative evaluation in the selection of various light sources and photosensitizing agents for photodynamic therapy in patients with clinical manifestations of photodamage.

scholarly journals Regional abnormality of functional connectivity is associated with clinical manifestations in individuals with intractable focal epilepsy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yasuo Nakai ◽  
Hiroki Nishibayashi ◽  
Tomohiro Donishi ◽  
Masaki Terada ◽  
Naoyuki Nakao ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Focal Epilepsy ◽  
Clinical Manifestations ◽  
Eigenvector Centrality ◽  
Functional Connections ◽  
Duration Of Illness ◽  
Healthy Control ◽  
Matched Data ◽  
Clinical Conditions ◽  
Age And Sex

AbstractWe explored regional functional connectivity alterations in intractable focal epilepsy brains using resting-state functional MRI. Distributions of the network parameters (corresponding to degree and eigenvector centrality) measured at each brain region for all 25 patients were significantly different from age- and sex-matched control data that were estimated by a healthy control dataset (n = 582, 18–84 years old). The number of abnormal regions whose parameters exceeded the mean + 2 SD of age- and sex-matched data for each patient were associated with various clinical parameters such as the duration of illness and seizure severity. Furthermore, abnormal regions for each patient tended to have functional connections with each other (mean ± SD = 58.6 ± 20.2%), the magnitude of which was negatively related to the quality of life. The abnormal regions distributed within the default mode network with significantly higher probability (p < 0.05) in 7 of 25 patients. We consider that the detection of abnormal regions by functional connectivity analysis using a large number of control datasets is useful for the numerical assessment of each patient’s clinical conditions, although further study is necessary to elucidate etiology-specific abnormalities.

scholarly journals Toxoplasma gondii Infection and Clinical Characteristics of Patients With Schizophrenia: A Systematic Review and Meta-analysis

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Arjen L Sutterland ◽  
David A Mounir ◽  
Juul J Ribbens ◽  
Bouke Kuiper ◽  
Tom van Gool ◽  
...  
Keyword(s):  
Systematic Review ◽  
Toxoplasma Gondii ◽  
Publication Bias ◽  
Clinical Characteristics ◽  
Negative Symptoms ◽  
Age Of Onset ◽  
Meta Analysis ◽  
Random Effects Models ◽  
Duration Of Illness ◽  
Toxoplasma Gondii Infection

Abstract Schizophrenia is associated with an increased prevalence of IgG antibodies against Toxoplasma gondii (T. gondii seropositivity), whereby the infection seems to precede the disorder. However, it remains unclear whether a T. gondii infection affects clinical characteristics of schizophrenia. Therefore, a systematic review and meta-analysis was conducted following PRISMA guidelines examining the association between T. gondii seropositivity and severity of total, positive, or negative symptoms or age of onset in schizophrenia. PubMed, Embase, and PsycInfo were systematically searched up to June 23, 2019 (PROSPERO #CRD42018087766). Random-effects models were used for analysis. Furthermore, the influence of potential moderators was analyzed. Indications for publication bias were examined. From a total of 934 reports, 13 studies were included. No overall effect on severity of total, positive, or negative symptoms was found. However, in patients with a shorter duration of illness T. gondii seropositivity was associated with more severe positive symptoms (standardized mean difference [SMD] = 0.32; P &lt; .001). Similar but smaller effects were seen for total symptoms, while it was absent for negative symptoms. Additionally, a significantly higher age of onset was found in those with T. gondii seropositivity (1.8 y, P = .015), although this last finding was probably influenced by publication bias and study quality. Taken together, these findings indicate that T. gondii infection has a modest effect on the severity of positive and total symptoms in schizophrenia among those in the early stages of the disorder. This supports the hypothesis that T. gondii infection is causally related to schizophrenia, although more research remains necessary.

scholarly journals Classification of lymphoid neoplasms: the microscope as a tool for disease discovery

Blood ◽  
2008 ◽  
Vol 112 (12) ◽  
pp. 4384-4399 ◽  
Author(s):  
Elaine S. Jaffe ◽  
Nancy Lee Harris ◽  
Harald Stein ◽  
Peter G. Isaacson
Keyword(s):  
Molecular Mechanisms ◽  
Nk Cell ◽  
Clinical Manifestations ◽  
Lymphoid Cells ◽  
World Health ◽  
International Studies ◽  
Lymphocyte Function ◽  
Lymphoid Neoplasms

AbstractIn the past 50 years, we have witnessed explosive growth in the understanding of normal and neoplastic lymphoid cells. B-cell, T-cell, and natural killer (NK)–cell neoplasms in many respects recapitulate normal stages of lymphoid cell differentiation and function, so that they can be to some extent classified according to the corresponding normal stage. Likewise, the molecular mechanisms involved the pathogenesis of lymphomas and lymphoid leukemias are often based on the physiology of the lymphoid cells, capitalizing on deregulated normal physiology by harnessing the promoters of genes essential for lymphocyte function. The clinical manifestations of lymphomas likewise reflect the normal function of lymphoid cells in vivo. The multiparameter approach to classification adopted by the World Health Organization (WHO) classification has been validated in international studies as being highly reproducible, and enhancing the interpretation of clinical and translational studies. In addition, accurate and precise classification of disease entities facilitates the discovery of the molecular basis of lymphoid neoplasms in the basic science laboratory.

To the syringomyelia clinic

1937 ◽  
Vol 33 (3) ◽  
pp. 363-366
Author(s):  
A. I. Sheiman ◽  
A. I. Nestereva
Keyword(s):  
Clinical Manifestations

The clinic of syringomyelia is currently well studied. Even 30 years ago, Schlesinger presented a classification of this disease with various complexes of clinical manifestations. In recent years, the literature on this issue has become even more enriched both in relation to the clinic and etiopathogenesis (Margulis, Bremer, Preobrazhensky, Genneberg, etc.).

scholarly journals Reversible Akinetic Mutism after Aneurysmal Subarachnoid Haemorrhage in the Territory of the Anterior Cerebral Artery without Permanent Ischaemic Damage to Anterior Cingulate Gyri

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
François-Xavier Sibille ◽  
Philippe Hantson ◽  
Thierry Duprez ◽  
Vincent van Pesch ◽  
Simone Giglioli
Keyword(s):  
Subarachnoid Haemorrhage ◽  
Cerebral Artery ◽  
Structural Damage ◽  
Anterior Cerebral Artery ◽  
Mass Effect ◽  
Favourable Outcome ◽  
Anterior Cingulate ◽  
Akinetic Mutism ◽  
Aneurysmal Subarachnoid Haemorrhage ◽  
Cingulate Gyri

We report on two cases of transient akinetic mutism after massive subarachnoid haemorrhage due to the rupture of an intracranial aneurysm of the anterior cerebral artery (ACA). In the two cases, vasospasm could not be demonstrated by imaging studies throughout the clinical course. Both patients shared common radiological features: a hydrocephalus due to haemorrhagic contamination of the ventricular system and a mass effect of a subpial hematoma on the borders of the corpus callosum. Patients were also investigated using auditory event-related evoked potentials at acute stage. In contrast to previous observations of akinetic mutism, P300 wave could not be recorded. Both patients had good recovery and we hypothesized that this unexpectedly favourable outcome was due to the absence of permanent structural damage to the ACA territory, with only transient dysfunction due to a reversible mass effect on cingulate gyri.

scholarly journals Aberrant Frontostriatal Connectivity in Negative Symptoms of Schizophrenia

2018 ◽  
Vol 45 (5) ◽  
pp. 1051-1059 ◽  
Author(s):  
Dinesh K Shukla ◽  
Joshua John Chiappelli ◽  
Hemalatha Sampath ◽  
Peter Kochunov ◽  
Stephanie M Hare ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Negative Symptom ◽  
Negative Symptoms ◽  
Imaging Study ◽  
Anterior Cingulate ◽  
Functional Magnetic Resonance ◽  
Resting State Functional Connectivity ◽  
Symptom Scale ◽  
Distinct Component ◽  
The Right

AbstractNegative symptoms represent a distinct component of psychopathology in schizophrenia (SCZ) and are a stable construct over time. Although impaired frontostriatal connectivity has been frequently described in SCZ, its link with negative symptoms has not been carefully studied. We tested the hypothesis that frontostriatal connectivity at rest may be associated with the severity of negative symptoms in SCZ. Resting state functional connectivity (rsFC) data from 95 mostly medicated patients with SCZ and 139 healthy controls (HCs) were acquired. Negative symptoms were assessed using the Brief Negative Symptom Scale. The study analyzed voxel-wise rsFC between 9 frontal “seed regions” and the entire striatum, with the intention to reduce potential biases introduced by predefining any single frontal or striatal region. SCZ showed significantly reduced rsFC between the striatum and the right medial and lateral orbitofrontal cortex (OFC), lateral prefrontal cortex, and rostral anterior cingulate cortex compared with HCs. Further, rsFC between the striatum and the right medial OFC was significantly associated with negative symptom severity. The involved striatal regions were primarily at the ventral putamen. Our results support reduced frontostriatal functional connectivity in SCZ and implicate striatal connectivity with the right medial OFC in negative symptoms. This task-independent resting functional magnetic resonance imaging study showed that medial OFC–striatum functional connectivity is reduced in SCZ and associated with severity of negative symptoms. This finding supports a significant association between frontostriatal connectivity and negative symptoms and thus may provide a potential circuitry-level biomarker to study the neurobiological mechanisms of negative symptoms.

scholarly journals Sexual Dysfunction in Chronically Medicated Male Inpatients With Schizophrenia: Prevalence, Risk Factors, Clinical Manifestations, and Response to Sexual Arousal

2022 ◽  
Vol 12 ◽  
Author(s):  
Dianying Liu ◽  
Shaohua Liu ◽  
Meihong Xiu ◽  
Hongdong Deng ◽  
Huiyun Guo ◽  
...  
Keyword(s):  
Risk Factors ◽  
Sexual Dysfunction ◽  
Sexual Arousal ◽  
Negative Symptoms ◽  
Sexual Experience ◽  
Clinical Manifestations ◽  
Common Symptom ◽  
Erotic Stimuli ◽  
Negative Factor ◽  
Male Patients

BackgroundSexual dysfunction is a common symptom in patients with schizophrenia, especially in chronically medicated patients. However, the relationship between sexual dysfunction and emotional response to sexual arousal in male patients with schizophrenia remains unclear. This study aimed to assess the incidence, risk factors of sexual dysfunction in males, and their clinical correlations to sexual arousal in male patients with schizophrenia in China.MethodsA total of 162 male patients, aged 18–50 years, with schizophrenia were recruited from a psychiatric hospital in Ganzhou. The clinical symptoms were assessed by the Positive and Negative Syndrome Scale (PANSS). The Arizona Sexual Experience Scale was utilized to evaluate sexual dysfunction. Erotic images were selected from International Affective Picture System (IAPS). Sixty-eight out of the 162 subjects completed the erotic pictures reactivity task.ResultsOverall, 48 (29.6%) patients were measured as having global sexual dysfunction, 72 (44.4%) patients as having strength of sex drive dysfunction, 51 (31.5%) patients as having sexual arousal dysfunction, 55 (34.0%) patients as having penile erection dysfunction, 60 (37.0%) patients as having reached orgasm dysfunction, and 60 (37.0%) patients as having satisfaction with orgasm dysfunction. The sexual dysfunction patients had significantly higher scores on the negative symptoms of the PANSS. The only important predictor of sexual dysfunction was the severity of PANSS negative factor. The sense of pleasure and arousal post viewing erotic images in the sexual dysfunction group were lower compared to the non-sexual dysfunction group. The sense of pleasure and approach motivation were significantly negatively correlated with the severity of sexual dysfunction.ConclusionsThis study shows that nearly one-third of young and middle-aged chronically medicated male inpatients with schizophrenia suffer from sexual dysfunction. The negative factor of the PANSS can be regarded as the risk factor of sexual dysfunction. Schizophrenia patients with sexual dysfunction experienced lower pleasure and higher avoidance motivation than non-sexual dysfunction patients when exposed to erotic stimuli.

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