PSY-P 101 Chapter 3: P101 Ch. 3 Notes (Jan. 30)

• School: IU
• Department: Psychological & Brain Sciences
• Course: PSY-P 101
• Professor: Motz Benjamin

Document Summary

Communicating internally: connecting world and brain: neurons- main components of nervous system; individual cells that receive, transmit, and integrate information. Afferent (sensory) neurons- carry environmental messages toward spinal cord and brain. Interneurons- transfer info from one neuron to another; no direct contact with outside world. Efferent (motor) neurons- carry info away from central nervous system to muscles and glands that directly produce behavior. Thi(cid:374)k (cid:862)effere(cid:374)t = e(cid:454)iti(cid:374)g(cid:863) (cid:271)rai(cid:374: glial cells- fill in space between neurons, remove waste, or help neurons communicate efficiently. Ca(cid:374) (cid:449)rap arou(cid:374)d parts of (cid:374)euro(cid:374)s to for(cid:373) (cid:862)i(cid:374)sulatio(cid:374)(cid:863) k(cid:374)o(cid:449)(cid:374) as myelin sheath- protects axon, helps speed up neural transmission. Ig(cid:374)ifi(cid:272)a(cid:374)t role i(cid:374) (cid:271)rai(cid:374) d(cid:455)sfu(cid:374)(cid:272)tio(cid:374) (cid:894)ie. (cid:272)a(cid:374)(cid:272)er, alzhei(cid:373)er"s(cid:895: reflexes- mostly automatic body reactions, controlled primarily by spinal cord pathways. No thought or feeling with spinal cord, but still powers reflexes. Ba(cid:271)ies do (cid:374)ot ha(cid:448)e i(cid:374)hi(cid:271)itor(cid:455) sig(cid:374)als to (cid:374)ot (cid:272)lose their ha(cid:374)d arou(cid:374)d so(cid:373)eo(cid:374)e"s fi(cid:374)ger (palmer grasp reflex) Brai(cid:374) tells spi(cid:374)al i(cid:374)ter(cid:374)euro(cid:374)s to (cid:374)ot fire so ha(cid:374)d does(cid:374)"t (cid:272)lose.