Specialization for Sound Localization in Fields A1, DZ, and PAF of Cat Auditory Cortex

摘要: Cortical deactivation studies in cats have implicated the primary auditory cortex (A1), dorsal zone (DZ), and posterior field (PAF) sound localization behavior, physiological anesthetized conditions demonstrated clear differences spatial sensitivity among those areas. We trained to perform two listening tasks then we recorded from cortical neurons off-task both on-task during single recording sessions. The results confirmed some of revealed unexpected differences. Neurons each showed a variety firing patterns, including onset-only, complex onset long latency, suppression or offset. A substantial minority units sharpening sensitivity, particularly that responses, task performance: 44 %, 35 %, 31 % areas A1, DZ, PAF, respectively, significant sharpening. Field DZ was distinguished by larger percentage responding best near-midline locations, whereas preferences PAF were distributed more uniformly throughout contralateral hemifield. Those directional biases also evident measures accuracy with which neural spike patterns could signal locations. provided greatest for midline location dependence orthogonal lateral suggest view representation exhibits an overrepresentation frontal around midline, provides uniform space, behind head. Spatial area A1 intermediate between as needed tasks.