BIOL 1521 Lecture Notes - Lecture 14: Middle Ear, Inner Ear, Incus
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Nose: the cells that are detecting the ap do not fire a neuron, 5 square centimeters of nose sensing area / 20 square centimeters in a cat that"s (cid:449)hy they ha(cid:448)e really stro(cid:374)g se(cid:374)se of s(cid:373)ell! Ear: meiss(cid:374)er"s (cid:272)orpus(cid:272)les detection of sensitive touch; good at adapting to stimulus, pacinian corpuscles detection of deep pressure, vibrations, ruffini corpuscles detection of continuous, heavy pressure, mechanoreceptors in ear are called hair cells. This is opposite of a resting neuron!! Fish have it on the lateral line. Tubular organisms have them inside cupula in a gelatinous cover: motion sickness. All (cid:271)ody (cid:373)us(cid:272)les tell your (cid:271)rai(cid:374) that you"re sitti(cid:374)g, (cid:271)ut your fluid is spinning, so your brain is taking in two different motor responses motion sickness. Invertebrates ear stones statolith: outer ear: pinna ear drum. Inner ear: oval window cochlea: middle ear: ear drum oval window, semicircular canals balance, round window is not connected to fluid in semicircular canals, cochlea is fluid-filled.
