Attention, Imagery and Memory: A Neuromagnetic Investigation
Final rept. 1 Mar 88-30 Sep 91,
NEW YORK UNIV NY NEUROMAGNETISM LAB
Pagination or Media Count:
The techniques of magnetic source imaging MSI have been applied to studies of three important aspects of human cognition 1 An investigation of the effects of selective spatial attention on information processing within the human visual cortex for stimuli of constant luminance have revealed that early response components from 120 to 180 ms latency provide evidence for such effects, but amplitude enhancements for later components from 120 to 180 ms latency provide evidence for such effects, but amplitude enhancements for later components are probably related to pattern recognition and task-relevant stimulus discrimination 2 A study of the relationship between the performance of a cognitive task such as visual imagery, or silent rhyming, and the suppression of spontaneous cortical rhythms reveals that the location, onset time, and duration of suppression are task specific and correlate with measures of performance 3 The first characterization of the functional attributes of neuronal activity in human auditory association cortex provides evidence that cortical activation traces in primary and association areas can be accurately characterized by distinct lifetimes, which typically amount to several seconds, and that these sensor memories characterize specific physical attributes of sounds.