PSY280H1 Lecture Notes - Lecture 9: Tectorial Membrane, Basilar Membrane, Stereocilia

• School: UTSG
• Department: Psychology
• Course: PSY280H1
• Professor: Professor Mack

Document Summary

Organ of corti: a structure on the basilar membrane of the cochlea composed of hair cells and dendrites of auditory nerv fibres. Movements of the cochlear partition translated into neural signals by structures in organ of corti. Tectorial membrane: gelatinous structure attached on one end, extends into the middle canal, floats above inner hair cells. Vibrations cause displacement of the tectorial membrane, which bends stereocilia attached to hair cells and causes the release of neurotransmitters. Stereocilia: hairlike extensions on the tips of hair cells in the cochlea that initiate the release of neurotransmitters when th. The tip of each stereocilium is connected to the side of its neighbor by a tiny filament called a tip link. Neural transduction of sound energy at the stereocilia: Potassium enters cell, leading to depolarization of the cell membrane. Depolarization opens calcium channels, causing vesicles to fuse with cell membrane and release neurotransmitters into t.