NROC64H3 Lecture Notes - Lecture 4: Basilar Membrane, Eardrum, Vestibular Nerve
Document Summary
Describe 3 pathways of visual system that are differently specialized for motion, colour, and shape. Based evolutionary (still in fish) called lateral lines system. Sound air molecules that bunch together in regions of lower and higher air pressure. Amount of physical energy (sound level on graph) The one ( dot blue) that are at the same horizontal dimension but since the second is on a higher level, it will be perceived as louder. Outer ear pinna and auditory canal. Three bones smallest bone in body ossicles. Oval window cochlea auditory vestibular nerve. We listened to louder, higher sound and ignore lower sounds. Different neurons respond to different frequencies along basilar membrane. Organ of corti inner hair cells touch techtorial membrane as basilar membrane moves, the organ of corti touches the techtoral membrane. Trpai channels if brushing towards long one, the distance larger then potassium enters which gives rise to depolarization. Hyperpolarization when leaning away from long hair.
