Everything about Tonotopy totally explained
Tonotopy (from Greek tono- and topos = place: the place of tones) is the spatial arrangement of where sound is perceived, transmitted, or received. It refers to the fact that tones close to each other in terms of frequency are represented in topologically neighbouring neurons in the brain. Tonotopic maps are a particular case of
topographic organization.
There is tonotopy in the
cochlea, the small snail-like structure in the inner ear that sends information about sound to the brain.
There is also tonotopy in the human auditory
cortex, that part of the
brain that receives and interprets sound information:
- sounds of low pitch project into the anterolateral aspect of Heschl's gyrus
- sounds of high pitch project deeply into the lateral fissure (which houses Heschl's gyrus).
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