Event-related potentials in cognitive neuropsychology: Methodological considerations and an example from studies of aphasia

Journal/Book: Behav Res Method Instrum Comp. 1998; 30: 1710 Fortview Rd, Austin, TX 78704. Psychonomic Soc Inc. 157-170.

Abstract: Recording event-related potentials (ERPs) from neurological patients introduces some methodological problems that are unique to this type of work. Important issues include, for example, the signal-to-noise ratio in patients relative to control subjects and changes in conductivity that are due to brain lesion. Therefore, in order to be able to reliably interpret possible changes in the ERP effects of brain-damaged patients as reflecting changes in underlying cognitive processes, it is important to clearly identify the factors that might contaminate the results of the experiments and to apply appropriate controls. Possible controls are discussed, and, as an example, some studies illustrating the use of ERPs in aphasic patients are reviewed.

Note: Review Swaab TY, Univ Calif Davis, Ctr Neurosci, 1544 Newton CT, Davis,CA 95616 USA

Keyword(s): MOVEMENT-RELATED POTENTIALS; LEXICAL DECISION TASK; BRAIN POTENTIALS; SINGLE-PATIENT; PARKINSONS-DISEASE; BROCAS APHASICS; SEMANTIC FACILITATION; SELECTIVE ATTENTION; ONLINE SENSITIVITY; ALZHEIMERS-DISEASE

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