scholarly journals Structural abnormalities in gyri of the prefrontal cortex in individuals with schizophrenia and their unaffected siblings

2010 ◽  
Vol 196 (2) ◽  
pp. 150-157 ◽  
Author(s):  
Michael P. Harms ◽  
Lei Wang ◽  
Carolina Campanella ◽  
Kristina Aldridge ◽  
Amanda J. Moffitt ◽  
...  
Keyword(s):  
Prefrontal Cortex ◽  
Cortical Thickness ◽  
Grey Matter ◽  
Genetic Factors ◽  
Inferior Frontal Gyrus ◽  
Familial Risk ◽  
Grey Matter Volume ◽  
Genetic Contribution ◽  
Matter Volume ◽  
Structural Abnormalities

BackgroundThe relatives of individuals with schizophrenia exhibit deficits of overall frontal lobe volume, consistent with a genetic contribution to these deficits.AimsTo quantify the structure of gyral-defined subregions of prefrontal cortex in individuals with schizophrenia and their siblings.MethodGrey matter volume, cortical thickness, and surface area of the superior, middle and inferior frontal gyri were measured in participants with schizophrenia and their unaffected (non-psychotic) siblings (n = 26 pairs), and controls and their siblings (n = 40 pairs).ResultsGrey matter volume was reduced in the middle and inferior frontal gyri of individuals with schizophrenia, relative to controls. However, only inferior frontal gyrus volume was also reduced in the unaffected siblings of those with schizophrenia, yielding a volume intermediate between their affected siblings and controls.ConclusionsThe structure of subregions of the prefrontal cortex may be differentially influenced by genetic factors in schizophrenia, with inferior frontal gyrus volume being most related to familial risk.

Habitual ‘sleep credit’ is associated with greater grey matter volume of the medial prefrontal cortex, higher emotional intelligence and better mental health

2013 ◽  
Vol 22 (5) ◽  
pp. 527-534 ◽  
Author(s):  
Mareen Weber ◽  
Christian A. Webb ◽  
Sophie R. Deldonno ◽  
Maia Kipman ◽  
Zachary J. Schwab ◽  
...  
Keyword(s):  
Mental Health ◽  
Emotional Intelligence ◽  
Prefrontal Cortex ◽  
Medial Prefrontal Cortex ◽  
Grey Matter ◽  
Grey Matter Volume ◽  
Matter Volume

Abnormalities in left inferior frontal gyral thickness and parahippocampal gyral volume in young people at high genetic risk for bipolar disorder

2016 ◽  
Vol 46 (10) ◽  
pp. 2083-2096 ◽  
Author(s):  
G. Roberts ◽  
R. Lenroot ◽  
A. Frankland ◽  
P. K. Yeung ◽  
N. Gale ◽  
...  
Keyword(s):  
At Risk ◽  
Bipolar Disorder ◽  
Surface Area ◽  
Cortical Thickness ◽  
Genetic Risk ◽  
Inferior Frontal Gyrus ◽  
Parahippocampal Gyrus ◽  
Grey Matter Volume ◽  
Degree Relative ◽  
Matter Volume

BackgroundFronto-limbic structural brain abnormalities have been reported in patients with bipolar disorder (BD), but findings in individuals at increased genetic risk of developing BD have been inconsistent. We conducted a study in adolescents and young adults (12–30 years) comparing measures of fronto-limbic cortical and subcortical brain structure between individuals at increased familial risk of BD (at risk; AR), subjects with BD and controls (CON). We separately examined cortical volume, thickness and surface area as these have distinct neurodevelopmental origins and thus may reflect differential effects of genetic risk.MethodWe compared fronto-limbic measures of grey and white matter volume, cortical thickness and surface area in 72 unaffected-risk individuals with at least one first-degree relative with bipolar disorder (AR), 38 BD subjects and 72 participants with no family history of mental illness (CON).ResultsThe AR group had significantly reduced cortical thickness in the left pars orbitalis of the inferior frontal gyrus (IFG) compared with the CON group, and significantly increased left parahippocampal gyral volume compared with those with BD.ConclusionsThe finding of reduced cortical thickness of the left pars orbitalis in AR subjects is consistent with other evidence supporting the IFG as a key region associated with genetic liability for BD. The greater volume of the left parahippocampal gyrus in those at high risk is in line with some prior reports of regional increases in grey matter volume in at-risk subjects. Assessing multiple complementary morphometric measures may assist in the better understanding of abnormal developmental processes in BD.

Polygenic effects of schizophrenia on hippocampal grey matter volume and hippocampus–medial prefrontal cortex functional connectivity

2019 ◽  
Vol 216 (5) ◽  
pp. 267-274 ◽  
Author(s):  
Shu Liu ◽  
Ang Li ◽  
Yong Liu ◽  
Hao Yan ◽  
Meng Wang ◽  
...  
Keyword(s):  
Prefrontal Cortex ◽  
Functional Connectivity ◽  
Medial Prefrontal Cortex ◽  
Grey Matter ◽  
Grey Matter Volume ◽  
Polygenic Risk Score ◽  
Polygenic Inheritance ◽  
Polygenic Risk ◽  
Matter Volume ◽  
A Genome

BackgroundSchizophrenia is a complex mental disorder with high heritability and polygenic inheritance. Multimodal neuroimaging studies have also indicated that abnormalities of brain structure and function are a plausible neurobiological characterisation of schizophrenia. However, the polygenic effects of schizophrenia on these imaging endophenotypes have not yet been fully elucidated.AimsTo investigate the effects of polygenic risk for schizophrenia on the brain grey matter volume and functional connectivity, which are disrupted in schizophrenia.MethodGenomic and neuroimaging data from a large sample of Han Chinese patients with schizophrenia (N = 509) and healthy controls (N = 502) were included in this study. We examined grey matter volume and functional connectivity via structural and functional magnetic resonance imaging, respectively. Using the data from a recent meta-analysis of a genome-wide association study that comprised a large number of Chinese people, we calculated a polygenic risk score (PGRS) for each participant.ResultsThe imaging genetic analysis revealed that the individual PGRS showed a significantly negative correlation with the hippocampal grey matter volume and hippocampus–medial prefrontal cortex functional connectivity, both of which were lower in the people with schizophrenia than in the controls. We also found that the observed neuroimaging measures showed weak but similar changes in unaffected first-degree relatives of patients with schizophrenia.ConclusionsThese findings suggested that genetically influenced brain grey matter volume and functional connectivity may provide important clues for understanding the pathological mechanisms of schizophrenia and for the early diagnosis of schizophrenia.

scholarly journals Altered heartbeat perception sensitivity associated with brain structural alterations in generalised anxiety disorder

2020 ◽  
Vol 33 (1) ◽  
pp. e100057 ◽  
Author(s):  
Hui Li ◽  
Bin Zhang ◽  
Qiang Hu ◽  
Lanlan Zhang ◽  
Yi Jin ◽  
...  
Keyword(s):  
Prefrontal Cortex ◽  
Anxiety Disorder ◽  
Anterior Cingulate Cortex ◽  
Medial Prefrontal Cortex ◽  
Grey Matter ◽  
Anterior Cingulate ◽  
Grey Matter Volume ◽  
Generalised Anxiety Disorder ◽  
Matter Volume ◽  
Heartbeat Perception

BackgroundPalpitation is a common complaint in generalised anxiety disorder (GAD). Brain imaging studies have investigated the neural mechanism of heartbeat perception in healthy volunteers. This study explored the neuroanatomical differences of altered heartbeat perception in patients with GAD using structural MRI.AimsBased on the strong somatic-interoceptive symptoms in GAD, we explored the regional structural brain abnormalities involved in heartbeat perception in patients with GAD.MethodsThis study was applied to the a priori regions using neuroanatomical theories of heartbeat perception, including the insula, anterior cingulate cortex, supplementary motor area and prefrontal cortex. A total of 19 patients with GAD and 19 healthy control subjects were enrolled. We used the FMRIB Software Library voxel-based morphometry software for estimating the grey matter volume of these regions of interest and analysed the correlation between heartbeat perception sensitivity and the volume of abnormal grey matter.ResultsPatients with GAD showed a significantly decreased volume of grey matter in their left medial prefrontal cortex, right orbital frontal cortex and anterior cingulate cortex. The grey matter volume of the left medial prefrontal cortex negatively correlated with heartbeat perception sensitivity in patients with GAD.ConclusionsIt should be the first study that shows heartbeat perception is associated with brain structure in GAD. Our findings suggest that the frontal region may play an important role in aberrant heartbeat perception processing in patients with GAD, and this may be an underlying mechanism resulting in the abnormal cardiovascular complaints in GAD. This is hypothesised as a ‘top-down’ deficiency, especially in the medial prefrontal cortex. This will provide the foundation for a more targeted region for neuromodulation intervention in the future.

scholarly journals 0307 Gray Matter Volume Correlates of Psychomotor Vigilance Speed During Sleep Deprivation

SLEEP ◽  
2020 ◽  
Vol 43 (Supplement_1) ◽  
pp. A116-A116
Author(s):  
C E Meinhausen ◽  
J R Vanuk ◽  
M A Grandner ◽  
W D Killgore
Keyword(s):  
Prefrontal Cortex ◽  
Sleep Deprivation ◽  
Gray Matter ◽  
Inferior Frontal Gyrus ◽  
Gray Matter Volume ◽  
Sleep Loss ◽  
Grey Matter Volume ◽  
Matter Volume ◽  
The Right ◽  
Psychomotor Vigilance

Abstract Introduction Sleep deprivation has often been associated with decreased cognitive control, including deficits in the ability to sustain attention. Psychomotor vigilance speed slows following a period of fatigue, and can lead to disastrous results in daily life. In order to determine the brain areas correlated with reduced psychomotor vigilance speed, as a result of diminished sleep, a voxel-based morphometry analysis was performed prior to a period of monitored sleep deprivation. The mean speed of response time during the final 17 hours of a 29-hour sleep deprivation was then measured with the Psychomotor Vigilance Test (PVT), a reaction-timed task that measures the speed participants respond to a visual stimulus. Methods 45 healthy individuals (male=23 female=22) between the ages of 20-43 years (M=25.4 SD=5.6) participated in the study. Structural neuroimaging data were collected using a T3 magnetic resonance imaging scanner following a typical night’s sleep. Mean PVT speed was monitored with an hourly 10-minute PVT assessment during a monitored overnight sleep deprivation session. Speed was defined as the reciprocal of reaction time (1/RT). Results PVT speed was negatively correlated with grey matter volume (P<.05 FWE-corrected) in the prefrontal cortex, specifically the right posterior inferior frontal gyrus (p=.030; MNI coordinates = 36, 12, 26). Conclusion Our findings indicate that gray matter within the right posterior inferior frontal gyrus is greater in individuals who are more vulnerable to slowing of PVT responses during an overnight period of sleep deprivation. These findings suggest that inter-individual differences in the ability to sustain psychomotor vigilance during sleep loss may be related to increased gray matter in the right lateral prefrontal cortex and could have implications for understanding the neurobiological substrates of vulnerability and resilience to sleep loss. Support  

Grey matter volume patterns in thalamic nuclei are associated with familial risk for schizophrenia

2017 ◽  
Vol 180 ◽  
pp. 13-20 ◽  
Author(s):  
Giulio Pergola ◽  
Silvestro Trizio ◽  
Pasquale Di Carlo ◽  
Paolo Taurisano ◽  
Marina Mancini ◽  
...  
Keyword(s):  
Grey Matter ◽  
Familial Risk ◽  
Grey Matter Volume ◽  
Thalamic Nuclei ◽  
Matter Volume

scholarly journals Relationship between depression, prefrontal creatine and grey matter volume

2021 ◽  
pp. 026988112110505
Author(s):  
Paul Faulkner ◽  
Susanna Lucini Paioni ◽  
Petya Kozhuharova ◽  
Natasza Orlov ◽  
David J Lythgoe ◽  
...  
Keyword(s):  
Prefrontal Cortex ◽  
Magnetic Resonance ◽  
Grey Matter ◽  
Well Being ◽  
Future Research ◽  
Resonance Spectroscopy ◽  
Grey Matter Volume ◽  
Whole Brain ◽  
Negatively Associated ◽  
Matter Volume

Background: Depression and low mood are leading contributors to disability worldwide. Research indicates that clinical depression may be associated with low creatine concentrations in the brain and low prefrontal grey matter volume. Because subclinical depression also contributes to difficulties in day-to-day life, understanding the neural mechanisms of depressive symptoms in all individuals, even at a subclinical level, may aid public health. Methods: Eighty-four young adult participants completed the Depression, Anxiety and Stress Scale (DASS) to quantify severity of depression, anxiety and stress, and underwent 1H-Magnetic Resonance Spectroscopy of the medial prefrontal cortex and structural magnetic resonance imaging (MRI) to determine whole-brain grey matter volume. Results/outcomes: DASS depression scores were negatively associated (a) with concentrations of creatine (but not other metabolites) in the prefrontal cortex and (b) with grey matter volume in the right superior medial frontal gyrus. Medial prefrontal creatine concentrations and right superior medial frontal grey matter volume were positively correlated. DASS anxiety and DASS stress scores were not related to prefrontal metabolite concentrations or whole-brain grey matter volume. Conclusions/interpretations: This study provides preliminary evidence from a representative group of individuals who exhibit a range of depression levels that prefrontal creatine and grey matter volume are negatively associated with depression. While future research is needed to fully understand this relationship, these results provide support for previous findings, which indicate that increasing creatine concentrations in the prefrontal cortex may improve mood and well-being.

scholarly journals Sex Differences in Brain Structure Account for the Sexual Distinction on Balanced Time Perspective

2021 ◽  
Author(s):  
Tao Chen ◽  
Zhi Li ◽  
Ji-fang Cui ◽  
Jia Huang ◽  
Muireann Irish ◽  
...  
Keyword(s):  
Sex Differences ◽  
Cortical Thickness ◽  
Grey Matter ◽  
Time Perspective ◽  
Supplementary Motor Area ◽  
Motor Area ◽  
Human Cognition ◽  
Grey Matter Volume ◽  
Matter Volume ◽  
Balanced Time Perspective

Abstract Sex differences in behaviour and cognition have been widely observed, however, little is known about such differences in maintaining a balanced time perspective or their potential underlying neural substrates. To answer the above questions, two studies were conducted. In Study 1, time perspective was assessed in 1,913 college students, including 771 males and 1,092 females, and demonstrated that females had a significantly more balanced time perspective than males. In Study 2, 58 males and 47 females underwent assessment of time perspective and structural brain imaging. Voxel-based morphometry analysis and cortical thickness analysis were used to analyse the structural imaging data. Results showed that compared with males, females demonstrated a more balanced time perspective, which primarily related to lower grey matter volume in left precuneus, right cerebellum, right putamen and left supplementary motor area. Analysis of cortical thickness failed to reveal any significant sex differences. Furthermore, the sex difference in grey matter volume of left precuneus, right cerebellum, right putamen and left supplementary motor area could account for the difference in balanced time perspective between males and females. The findings deepen our understanding of sex differences in human cognition and their potential neural signature, and may inform tailored interventions to support a balanced time perspective in daily life.

scholarly journals Convergent and divergent brain structural and functional abnormalities associated with developmental dyslexia

eLife ◽  
2021 ◽  
Vol 10 ◽  
Author(s):  
Xiaohui Yan ◽  
Ke Jiang ◽  
Hui Li ◽  
Ziyi Wang ◽  
Kyle Perkins ◽  
...  
Keyword(s):  
Developmental Dyslexia ◽  
Grey Matter ◽  
Meta Analysis ◽  
Inferior Frontal Gyrus ◽  
Brain Activation ◽  
Superior Temporal Gyrus ◽  
Brain Regions ◽  
Middle Temporal Gyrus ◽  
Grey Matter Volume ◽  
Matter Volume

Brain abnormalities in the reading network have been repeatedly reported in individuals with developmental dyslexia (DD); however, it is still not totally understood where the structural and functional abnormalities are consistent/inconsistent across languages. In the current multimodal meta-analysis, we found convergent structural and functional alterations in the left superior temporal gyrus across languages, suggesting a neural signature of DD. We found greater reduction in grey matter volume and brain activation in the left inferior frontal gyrus in morpho-syllabic languages (e.g. Chinese) than in alphabetic languages, and greater reduction in brain activation in the left middle temporal gyrus and fusiform gyrus in alphabetic languages than in morpho-syllabic languages. These language differences are explained as consequences of being DD while learning a specific language. In addition, we also found brain regions that showed increased grey matter volume and brain activation, presumably suggesting compensations and brain regions that showed inconsistent alterations in brain structure and function. Our study provides important insights about the etiology of DD from a cross-linguistic perspective with considerations of consistency/inconsistency between structural and functional alterations.

scholarly journals Late chronotype is linked to greater cortical thickness in the left fusiform and entorhinal gyri

2021 ◽  
Author(s):  
Michal Rafal Zareba ◽  
Magdalena Fafrowicz ◽  
Tadeusz Marek ◽  
Ewa Beldzik ◽  
Halszka Oginska ◽  
...  
Keyword(s):  
White Matter ◽  
Cortical Thickness ◽  
Grey Matter ◽  
Brain Regions ◽  
Affective Processing ◽  
Grey Matter Volume ◽  
Imaging Data ◽  
White Matter Volume ◽  
Matter Volume ◽  
Anatomical Basis

Abstract Humans can be classified as early, intermediate and late chronotypes based on the preferred sleep and wakefulness patterns. The anatomical basis of these distinctions remains largely unexplored. Using magnetic resonance imaging data from 113 healthy young adults (71 females), we aimed to replicate cortical thickness and grey matter volume chronotype differences reported earlier in the literature using a greater sample size, as well as to explore the volumetric white matter variation linked to contrasting circadian phenotypes. Instead of comparing the chronotypes, we correlated the individual chronotype scores with their morphometric brain measures. The results revealed one cluster in the left fusiform and entorhinal gyri showing increased cortical thickness with increasing preference for eveningness, potentially providing an anatomical substrate for chronotype-sensitive affective processing. No significant results were found for grey and white matter volume. We failed to replicate cortical thickness and volumetric grey matter distinctions in the brain regions reported in the literature. Furthermore, we found no association between white matter volume and chronotype. Thus, while this study confirms that circadian preference is associated with specific structural substrates, it adds to the growing concerns that reliable and replicable neuroimaging research requires datasets much larger than those commonly used.

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