PMID: 8592204Nov 1, 1995Paper

Dissociation of human prefrontal cortical areas across different speech production tasks and gender groups

Journal of Neurophysiology
R L BucknerS E Petersen

Abstract

1. Data from a series of positron emission tomography (PET) experiments were analyzed with two goals. The first goal was to determine whether there were reliable differences in prefrontal cortex activation across two different speech production tasks. Such differences are important in determining functional subdivisions within prefrontal cortex. The second goal was to determine whether there were any gender differences across the two speech production tasks. 2. To accomplish these goals, PET subtraction images were generated for each of two speech production tasks (stem completion and verb generation). For the stem completion task, subjects viewed word stems (e.g., "GRE") and said aloud words that could complete the stems (e.g., "green"). For the verb generation task, subjects viewed nouns (e.g., "CHAIR") and said aloud words that were meaningfully related verbs (e.g., "sit"). Different groups of subjects performed the stem completion (N = 29) and verb generation (N = 32) tasks. 3. Data from each task subtraction were further divided by gender group (i.e., verb generation: male group; verb generation: female group, etc.). PET activations were separately identified in prefrontal cortex for each of the four resulting images. Acti...Continue Reading

Citations

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