Electrophysiological correlates of visual short-term memory binding deficits in community-dwelling seniors at risk of dementia

IF 3.7 3区医学 Q1 CLINICAL NEUROLOGY

Clinical Neurophysiology Pub Date : 2025-01-24 DOI:10.1016/j.clinph.2025.01.009

Rodrigo Alberto Gonzalez-Montealegre , Alfredis González-Hernández , Jasmin Bonilla-Santos , Dorian Yisela Cala-Martínez , Mario Alfredo Parra

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引用次数: 0

Abstract

Background

Visual Short-Term Memory Binding (VSTMB) is a preclinical marker of Alzheimer’s disease (AD). Reduced early event-related potentials (ERPs) (100–250 ms) over fronto-central (FC) and parieto-occipital (PO) regions have been reported in patients with Mild Cognitive Impairment (MCI) seen in the clinic. We investigated such ERPs in a larger sample of community-dwelling older adults who had not sought medical advice.

Methods

Participants (n = 215) were assessed with a neuropsychological battery and the VSTMB Task. The latter assessed the ability to detect changes between two consecutive arrays of shapes or colored shapes (the Binding condition). Time-locked EEG signals were collected during the task.

Results

Those who met the MCI criteria (n = 108) showed binding impairment. ERP analyses revealed significant Group x Time Windows interactions. Early ERP showed reduced neural recruitment (MCI < healthy controls (HC)) over the right FC regions, left PO, and right centro-parietal (CP) regions during Binding encoding, and over PO regions bilaterally and left FC during retrieval. Late ERP showed increased neural recruitment (MCI > HC) on left FC and PO regions during retrieval.

Conclusions

Hyper-recruitment may reflect functional reorganization aimed at behavioral compensation in the early stages of MCI. The role of such amplitude shifts as pointers of transition points in the AD continuum needs further investigation.

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来源期刊

Clinical Neurophysiology 医学-临床神经学

CiteScore

8.70

自引率

6.40%

发文量

932

审稿时长

59 days

期刊介绍： As of January 1999, The journal Electroencephalography and Clinical Neurophysiology, and its two sections Electromyography and Motor Control and Evoked Potentials have amalgamated to become this journal - Clinical Neurophysiology. Clinical Neurophysiology is the official journal of the International Federation of Clinical Neurophysiology, the Brazilian Society of Clinical Neurophysiology, the Czech Society of Clinical Neurophysiology, the Italian Clinical Neurophysiology Society and the International Society of Intraoperative Neurophysiology.The journal is dedicated to fostering research and disseminating information on all aspects of both normal and abnormal functioning of the nervous system. The key aim of the publication is to disseminate scholarly reports on the pathophysiology underlying diseases of the central and peripheral nervous system of human patients. Clinical trials that use neurophysiological measures to document change are encouraged, as are manuscripts reporting data on integrated neuroimaging of central nervous function including, but not limited to, functional MRI, MEG, EEG, PET and other neuroimaging modalities.