KINESIOL 2Y03 Lecture Notes - Lecture 8: Cholinergic, Sympathetic Ganglion, Basilar Membrane

• School: McMaster University
• Department: Kinesiology
• Course: KINESIOL 2Y03
• Professor: Krista Howarth

Document Summary

Perilymph low in potassium, high in sodium. Endolymph high in potassium, low in sodium. Membranous labyrinth: the series of membranes found on the inside that separate the various chambers. Scala vestibule: filled with perilymph; runs from the oval window to the cochlea to a region called the helicotrema. Scala tympani: filled with perlymph; from the helicotrema and back to the round window. Cochlear duct: filled with endolymph; contains special receptors that we can then incorporate in the brain. Vestibular membrane: a very thin membrane that sperates the fliud of the perilymph with the endolymph. Basllar membrane is a thick membrane because the hair cells (receptors) are imbedded into this membrane. Cochlear nerve is one branch of cranial nerve 8. The outside of that nerve is the cochlear ganglion. Inner hair cells are a single row of cells that are involved in our special sense of hearing to perceive sound.