missing peaks in auditory brainstem responses and negative symptoms in schizophrenia pdf Monday, December 14, 2020 12:36:11 AM

Missing Peaks In Auditory Brainstem Responses And Negative Symptoms In Schizophrenia Pdf

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Published: 14.12.2020

John J. McMurtrey, [a] Copyright , May 3,

Either your web browser doesn't support Javascript or it is currently turned off. In the latter case, please turn on Javascript support in your web browser and reload this page. The present, case-control, study investigates binaural hearing performance in schizophrenia patients towards sentences presented in quiet and noise.

Auditory Brainstem Response Abnormalities in Schizophrenic Patients with Auditory Hallucinations

We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings. Studying brainstem auditory evoked potentials BAEPs and comparing the specific waves in smokers vs nonsmokers in both positive- and negative-symptom schizophrenia may elucidate the role of smoking in information processing. BAEPs were recorded in 40 patients with schizophrenia; 20 had predominantly positive symptoms 10 smokers and 10 nonsmokers and 20 had predominantly negative symptoms 10 smokers and 10 nonsmokers. The severity of positive and negative symptoms was assessed by scale of assessment of positive symptoms and scale of assessment of negative symptoms SANS. The BAEP results were compared with 15 healthy control individuals matched with the patients by age, sex, and cultural background. The smokers with negative symptoms showed a significant increase in the alogia, summary, and composite scores of SANS as compared to the nonsmokers.

The auditory brain-stem response ABR waveform comprises a set of waves labeled I—VII recorded with scalp electrodes over 10 ms after an auditory stimulation with a brief click sound. Quite often, the waves are fused confluent and baseline-irregular and sloped, making wave latencies and wave amplitudes difficult to establish. The findings show promise regarding the possibility to identify ABR markers to be used as biomarkers as support for clinical diagnoses of these and other neuropsychiatric disorders. The auditory brain-stem response ABR is a sound stimulus-evoked change in electrical potential measured in microvolts and recorded over 10 ms using scalp electrodes that record synchronous electrical activity of populations of brain-stem neurons. The technique was first described by Jewett and Williston in , and reflects subcortical potential shifts evoked by auditory stimuli, typically square pulse trains. Waves I and II emanate from the auditory nerve, whereas the subsequent positive waves are thought to reflect combined electrical activity of nuclei at higher levels of the ascending auditory pathway. Wave V is believed to represent activity at the levels of the lateral lemniscus and inferior colliculus.

Cognitive deficits limit psychosocial functioning in schizophrenia. For many patients, cognitive remediation approaches have yielded encouraging results. Nevertheless, therapeutic response is variable, and outcome studies consistently identify individuals who respond minimally to these interventions. Biomarkers that can assist in identifying patients likely to benefit from particular forms of cognitive remediation are needed. Here, we describe an event-related potential ERP biomarker — the auditory brain-stem response ABR to complex sounds cABR — that appears to be particularly well-suited for predicting response to at least one form of cognitive remediation that targets auditory information processing. Uniquely, the cABR quantifies the fidelity of sound encoded at the level of the brainstem and midbrain.

We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings. Studying brainstem auditory evoked potentials BAEPs and comparing the specific waves in smokers vs nonsmokers in both positive- and negative-symptom schizophrenia may elucidate the role of smoking in information processing. BAEPs were recorded in 40 patients with schizophrenia; 20 had predominantly positive symptoms 10 smokers and 10 nonsmokers and 20 had predominantly negative symptoms 10 smokers and 10 nonsmokers. The severity of positive and negative symptoms was assessed by scale of assessment of positive symptoms and scale of assessment of negative symptoms SANS. The BAEP results were compared with 15 healthy control individuals matched with the patients by age, sex, and cultural background.

Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. DOI: Sayadnasiri and O. Sayadnasiri , O. Background : although the exact pathogenesis of auditory hallucinations is not yet known, some suggested the impairment of perception and processing of auditory information as a possible explanation. So, the aim of this study is to evaluate auditory pathways of schizophrenic patients using auditory brainstem responses ABR.

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5 Comments

William C. 14.12.2020 at 08:45

Cognitive deficits limit psychosocial functioning in schizophrenia.

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