BISC306 Lecture Notes - Lecture 9: Semicircular Canals, Angular Acceleration, Outer Ear
5 Oct 2016
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Hair cells of the sacculus and utriculus sense linear acceleration including gravity d. iv. Hair cells are embedded in gelatinous material containing otoliths which makes the density of the layer greater than the surrounding fluid d. v. Utriculus-gelatinous mass moves as the head moves in different directions which bends the stereocillia and sends a signal as a result d. v. 1. Acceleration will bend the stereovilli of the hair cells d. vi. Sacculus-constantly being bent downwards due to the response of the force of gravity; position of body in earth"s gravitational field d. vii. Semicircular canals-hair cells at the base of the canals sense angular acceleration d. vii. 1. Hair cells are embedded in gelatinous mass called the cupula which is the same density as the surrounding fluid d. vii. 2. Vibrations from sound push on bones of inner ear and pass on vibration a. ii. Fluid is essentially incompressible; oval window is pushed in it causes the round window to be pushed out and vice-versa a. iii.
