PSC 136 Lecture Notes - Lecture 11: Superior Temporal Gyrus, Auditory Cortex, Tonality
Document Summary
Tonality: from intervals to melodies to scales to keys. Given a collection of tones, we can ask, what is the just - noticeable difference between them? . Heschl"s gyrus - contains primary auditory cortex. Examples of surgical interventions to alleviate intractable epilepsy. Specific test of the hypothesis that the right auditory cortex processes pitch direction. Lta/ rta - small removal from auditory regions from left or right hemisphere, respectively. Lta/ rta - large removal from auditory regions from left of right hemisphere, respectively. These removals encroach on heschl"s gyrus & are more posterior that the. Task a - subject must state whether the pair of tones is the same or different. Task b - subject must state whether the 2nd tone went up or down in pitch relative to the 1st. The frequency difference between the tones is decreased in response to correct answers & increased in response to incorrect answers until a discrimination threshold is identified.
