Brain Responses at Encoding Predict Limited Verbal Memory Retrieval by Persons with Schizophrenia
| Autor: | Noah C. Venables, Julia Longenecker, Seung Suk Kang, Kathryn A. McGuire, Scott R. Sponheim |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male medicine.medical_specialty Memory Episodic Audiology behavioral disciplines and activities 03 medical and health sciences 0302 clinical medicine Encoding (memory) medicine Humans Family Genetic Predisposition to Disease Genetic risk Evoked Potentials Episodic memory Recall Brain Electroencephalography General Medicine Middle Aged medicine.disease N400 030227 psychiatry Psychiatry and Mental health Clinical Psychology Electrophysiology Neuropsychology and Physiological Psychology Schizophrenia Mental Recall Female Original Empirical Article Verbal memory Psychology 030217 neurology & neurosurgery Cognitive psychology |
| Zdroj: | Archives of Clinical Neuropsychology. 33:477-490 |
| ISSN: | 1873-5843 |
| DOI: | 10.1093/arclin/acx082 |
| Popis: | OBJECTIVE: Special attention has been given to verbal memory deficits in schizophrenia because they are apparent in healthy biological relatives of affected individuals, indicating a link to genetic risk for the disorder. Despite a growing consensus that encoding abnormalities contribute to poor verbal memory in the disorder, few studies have directly examined how neural responses during encoding contribute to later memory performance. METHOD: We evaluated event-related potentials (ERPs) during encoding of verbal material by patients with schizophrenia, healthy first-degree biological relatives of patients, and healthy controls. The extent to which N1, N400, and anterior and parietal Late Positive Components (LPCs) explained encoding accuracy and later memory of material was investigated. RESULTS: Encoding accuracy was associated with asymmetry in anterior LPCs toward right frontal brain regions and was most evident in relatives. N1 was abnormal at encoding in schizophrenia and differentially accounted for later memory performance. In controls better recall of verbal material was predicted by a larger early occipital (N1) encoding response; however, in patients with schizophrenia smaller N1 encoding responses were related to better recall. Interestingly, better recognition of verbal material across groups was also predicted by smaller N1 amplitudes during encoding of word stimuli. CONCLUSION: Separable patterns of electrophysiological response during encoding appear to differentially support recall and recognition of material from memory. Similar patterns of electrophysiological response across patient and relative groups suggest that those who carry genetic liability for schizophrenia share deviations in the neural activity related to encoding of material into episodic memory. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|