PHS 3341 Lecture Notes - Lecture 7: Cochlea, Potassium Channel, Eustachian Tube
Document Summary
Vestibulochoclear nerve as the name suggests: 1 from coclia audition, vestibular function the sense you can detect body movement in 3d and orientation of body due to gravity. 3 parts: external ear composed of the pinna (dish antennae), external auditory meadus (channel) timpanic membrane (ear drum) To prevent rupture, don"t stick anything in the ear drum. Middle ear air filled like external ear, contains 3 bones: maileaous, stapease, Giving mechanical amplification of vibrations, air filled space can communicate with external environment and atmosphere via the ustation tube opening into back of throat. Usually closed but sometimes needs to regulate air flow and it can open yawning does it to chewing gum. Pinna important because it has many structures, contrast between prey and predator animals, different levels of mobility to focus on different angles of the environment. Incus and maleous to push on oval window. Vestibulor not activated by sound, activated by movement.
