NROC64H3 Chapter Notes - Chapter 21: Muscimol, Bicuculline, Gaba Receptor Antagonist

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Intro: attention = state of selectively processing simultaneous sources of info; preferential processing of sensory info; selectively attend to some info & ignore rest. Interactions btn modalities may occur (performing attention-demanding visual task like reading; less sensitive to incoming sounds) Inhibits da transporter = increases post-syn effect of da. Shifting attention to some location on retina enhances visual processing by: enhanced detection and faster reaction times. When central cue is +, detected target stimulus 60% of the trials in which one was presented. Subjects in fmri viewed stimulus = colored line segments arranged in circular sectors at several distances from central fixation point. Subject instructed which sector to pay attention to, located changed. During 10 sec, color and orientation of line segments changed every every 10 sec. Press one button if lines were blue&horizontal or orange&vertical; press a 2nd button if lines were blue&vertical or orange&horizontal.

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