BIOL 4370 Lecture Notes - Benign Paroxysmal Positional Vertigo, Lateral Rectus Muscle, Bony Labyrinth
16 Mar 2014
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All 3-d movements can be broken into 3 components, x, y and z. Vestibular system detects, linear disposition, rotational disposition, and tilt. Nov. 7th semi-circular canals are perpendicular to each other (doesn"t matter that they are not in. Cardinal planes because they are perpendicular to each other and brain infers planes relative to each other ie. changing the definition of x, y and z) utricle and saccule both detect linear acceleration and tilt. Hair cells have stereocillia that go from shorter to longer and are embedded in otolithic membrane membrane (which contains crystals at top called otoconia) In saccular (imaginary) striola is midline and longest end of steriocila point away from it (saccula is in saggital plane) In utricle longest end of steriocilia point towards midline (utricle is in horizontal plane) Otoconia add mass (inertia) to the otolithic membrane vestibular labyrinth is made up of bones of semi circular canals, and utricle and sacccule.
