PS102 Lecture Notes - Lecture 4: Sensory Cortex, Vestibular System
Document Summary
Rely on chemical molecules not a form of energy. Chemical receptors = taste buds consist of several receptor cells. About 9000 taste buds grouped in different regions. Taste sensations are: sweet, sour, salty, bitter and umami sensitive to glutamate. Papillae are small bumps on the tongue that contain taste buds. Some people are better at tasting than others super taster. Have receptor sites that resemble neurotransmitter binding site. Receptors send messages to olfactory area in brain. Sensitive to 4 tactile sensation: pressure, pain, warmth cold. Skin is the largest organ in body. Non-skin areas has a lot of pacinian corpuscle. Surprise for a(cid:374) adult is a(cid:374) alert, for a (cid:272)hildre(cid:374) it"s fu(cid:374) Kinaesthetic sense info from tendons, muscles and joints about: position of body parts in relation to each other, move(cid:373)e(cid:374)t of the e(cid:374)tire (cid:271)ody a(cid:374)d it"s parts. Vestibular sense detects movement: provides i(cid:374)fo a(cid:271)out (cid:271)ody"s orie(cid:374)tatio(cid:374) i(cid:374) spa(cid:272)e, receptors in vestibular apparatus of inner ear.
