BIOL 306 Lecture Notes - Lecture 25: Hindbrain, Fundamental Frequency, Sound Intensity
9 Jan 2018
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Document Summary
Use of sensory information to modulate motor output, a dynamic process, motor command is modified at each step depending of sensory input. Ot process information and localization, projects to hindbrain, which controls movement. Stimulate different parts of ot, direction of head turning corresponds to point of stimulation, regardless of the length of stimulus. When we speak, we pay attention to the sounds we make. The peak error corresponds to length of syllable in english. Localized delay in auditory feedback (one syllable) affect syllable timing. Also affect syllable sequencing (sequencing: how the song is programmed, transition between notes) Shifting pitch feedback cause the voice to shift in opposite direction in compensatory changes. Pitch shifted up, voice shift down (in opposite direction) Also observed in songbirds, but takes days to adjust. Hvc are active during singing, integrate sensory and motor information during song production. Acute perturbation of auditory feedback transiently decreases hvc activity (at the note of changed feedback)
