SPLH 620 Unit 2 Study Guide with Complete Solutions(GRADED A+)

CN VIII: Vestibulocochlear - ANSWER-hearing and balance - vestibular division - cochlear division - hearing and balance are functionally very different senses but begin similarly peripherally -vestibular: position and movement of head anatomy of hearing and balance - ANSWER-• Outer ear - Pinna - Ear canal • Middle ear - Tympanic membrane - Ossicles (malleus, incus, stapes) • Inner ear - Cochlea - Vestibular system middle ear - ANSWER-- Tympanic membrane - Air filled - Ossicles (Malleus, incus, stapes) - Oval Window inner ear (cochlea) - ANSWER-fluid filled middle ear function - ANSWER-•Amplification of signal •Transforms signal •(acoustic->mechanical) inner ear function - ANSWER-•Transforms signal: •Mechanical -> chemoelectric •Represent sound frequencies How is sound transmitted? - ANSWER-Vibrations transmitted through the tympanic membrane, middle ear ossicles, and oval window reach the perilymph (fluid) of the inner ear cochlea - ANSWER-- a coiled tube (2.5 turns) with three chambers: • Scala vestibuli (perilymph) • Scala tympani (perilymph) • Scala media (endolymph)