Auditory System — Flashcards

Flashcard 1: _____ -lymph (inner ear) is characterized by high Na+ and low K+ concentration

Answer: Peri

Flashcard 2: Weber-Fechner Law states that the magnitude of sensation felt is proportionate to the log of the _____ of the stimulus.

Answer: intensity

Flashcard 3: Endocochlear potential is a direct current (DC) potential recorded from scala _____.

Answer: media

Flashcard 4: Wave III of BERA is produced by the _____

Answer: Superior olivary complex (SOC)

Extra: The standard anatomical correlates for BERA (Brainstem Evoked Response Audiometry) waves are: • Wave I: Distal portion of the 8th cranial nerve • Wave II: Cochlear nucleus (proximal 8th nerve) • **Wave III: Superior olivary complex** • Wave IV: Lateral lemniscus • Wave V: Inferior colliculus (most prominent wave) • Wave VI: Medial geniculate body • Wave VII: Auditory radiations Mnemonic: **E COLI** (Eighth nerve, Cochlear nucleus, Olivary complex, Lateral lemniscus, Inferior colliculus).

Flashcard 5: Wave V of BERA is produced by the _____

Answer: inferior colliculus

Flashcard 6: What senses are impaired with zinc deficiency? _____ and smell (anosmia)

Answer: taste (dysgeusia)

Flashcard 7: Accommodation (near response) occurs via contraction of the _____ muscle, which relaxes the suspensory ligaments and allows the lens to become more round

Answer: ciliary

Flashcard 8: Which types of sensory receptor adapt quickly? _____ and Meissner corpuscles

Answer: Pacinian corpuscles

Flashcard 9: Position sense involves muscle spindles, golgi tendon organs, and _____ receptors and joint capsule receptors

Answer: skin tactile

Flashcard 10: The _____ of hearing was proposed by Georg von Békésy.

Answer: Traveling wave theory