Mismatch negativity as an early biomarker of cognitive impairment in schizophrenia

The Egyptian Journal of Neurology, Psychiatry and Neurosurgery

Research

Enaas Ahmad Kolkaila¹  Mona Ahmed Kotait¹  Abeer Mamdouh Ali Mahmoud²  Mai Abd-Elraoof Eissa³  Reham Abdel Rahman Amer³ 

[1] Audio-Vestibular Medicine-ENT, Faculty of Medicine, Tanta University, Tanta, Egypt;Ministry of Health Hospitals, Tanta, Egypt;Neuropsychiatry Department, Faculty of Medicine, Tanta University, Tanta, Egypt;

关键词: Early schizophrenia;    Chronic schizophrenia;    Mismatch negativity;    Biomarker;    Cognitive impairment;    Psychometric tests;   

DOI  :  10.1186/s41983-023-00627-5

 received in 2022-08-30, accepted in 2023-02-03,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundDue to its disturbance in schizophrenic patients, mismatch negativity (MMN) generation is believed to be a potential biomarker for recognizing primary impairments in auditory sensory processing during the course of the disease. However, great controversy exists regarding the type and onset of MMN-related impairments, with the deficits to frequency deviants is more debatable. This cross-sectional, case–control study was conducted to assess the cognitive functions among 33 eligible Egyptian schizophrenics (15 early and 18 chronic), and 30 matched healthy controls by assessing their psychometric tests and correlating them to the coexisting frequency deviant MMN responses (using both tone and speech stimuli).ResultsDeficits in frequency MMN and neuropsychological tests were evident among early and chronic schizophrenics compared to their matched control counterparts, and also between early versus chronic schizophrenia in favor of the later. MMN deficits to speech stimuli were more elicited than tone stimuli among schizophrenics. Moreover, significant correlations were identified between MMN parameters and the results of psychiatric cognitive scales.ConclusionsWe demonstrated that frequency-deviant MMN deficits are evident feature among the enrolled Egyptian schizophrenics. The cognitive functions as indexed by MMN seem affected early, with the striking decrease of MMN amplitude and delay of latency point towards the progression of the illness. The normal lateralization of MMN was absent in chronic schizophrenia. These findings could be helpful in using the MMN as an additional objective tool for confirming cognitive impairments among schizophrenics and to differentiate between early- and chronic-schizophrenic patients for medico-legal purposes and clinical implication for medications.

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

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