Abnormal Effective Connectivity in the Brain is Involved in Auditory Verbal Hallucinations in Schizo

来源 :神经科学通报(英文版) | 被引量 : 0次 | 上传用户:yun603
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Information flow among auditory and language processing-related regions implicated in the pathophysiology of auditory verbal hallucinations (AVHs) in schizophrenia (SZ) remains unclear.In this study,we used stochastic dynamic causal modeling (sDCM) to quantify connections among the left dorsolateral prefrontal cortex (inner speech monitoring),auditory cortex (auditory processing),hippocampus (memory retrieval),thalamus (information filtering),and Broca\'s area (language production) in 17 first-episode drug-na(1)ve SZ patients with AVHs,15 without AVHs,and 19 healthy controls using resting-state functional magnetic resonance imaging.Finally,we performed receiver operating characteristic (ROC) analysis and correlation analysis between image measures and symptoms,sDCM revealed an increased sensitivity of auditory cortex to its thalamic afferents and a decrease in hippocampal sensitivity to auditory inputs in SZ patients with AVHs.The area under the ROC curve showed the diagnostic value of these two connections to distinguish SZ patients with AVHs from those without AVHs.Furthermore,we found a positive correlation between the strength of the connectivity from Broca\'s area to the auditory cortex and the severity of AVHs.These findings demonstrate,for the first time,augmented AVHspecific excitatory afferents from the thalamus to the auditory cortex in SZ patients,resulting in auditory perception without external auditory stimuli.Our results provide insights into the neural mechanisms underlying AVHs in SZ.This thalamic-auditory cortical-hippocampal dysconnectivity may also serve as a diagnostic biomarker of AVHs in SZ and a therapeutic target based on direct in vivo evidence.
其他文献
Dear Editor,rnThe mammalian cerebral cortex,responsible for all higherorder brain functions,is organized into six layers of neurons that form distinct projections and connections within and outside the cortex.During cortical development,neural progenitor
期刊
Stroke is a leading cause of death worldwide.Up to one thousand potential drugs or interventions have been developed to treat stroke,out of which ~ 160 have gone on to clinical trials.However,none of them has been successful.New insights into the molecula
In this study,we aimed to (1) identify white matter (WM) deficits underlying the consciousness level in patients with disorders of consciousness (DOCs) using diffusion tensor imaging (DTI),and (2) evaluate the relationship between DTI metrics and clinical
A previous study has indicated that Krüppel-like factor 7 (KLF7),a transcription factor that stimulates Schwann cell (SC) proliferation and axonal regeneration after peripheral nerve injury,is a promising therapeutic transcription factor in nerve injury.W
Essential language sites and the arcuate fasciculus (AF) have been extensively researched.However,the relationship between them remains insufficiently studied,especially in healthy people.Navigated transcranial magnetic stimulation (nTMS) is increasingly
Ion channels are crucial in the generation and modulation of excitability in the nervous system and have been implicated in human epilepsy.Forty-one epilepsyassociated ion channel genes and their mutations are systematically reviewed.In this paper,we anal
Dear Editor,rnSchizophrenia is a chronic and debilitating brain disorder,which has a strong genetic component with heritability ranging from 66% to 85% [1,2].Currently,antipsychotic drugs remain the most effective treatment for the psychotic symptoms of s
期刊
Patients with schizophrenia undergo changes in brain plasticity.In the present study,we characterized motor cortical-striatal plasticity in such patients.Compared with the potentiation following high-frequency repetitive transcranial magnetic stimulation