PSYCH356 Chapter Notes - Chapter 8: Agreeableness, Fluoxetine, Monoamine Oxidase
4 Mar 2018
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Chapter 8: the anatomy and physiology of personality. The anatomy of personality (cid:894)(cid:449)o(cid:449), i (cid:272)an"t (cid:271)elie(cid:448)e it(cid:895) Nerve cells or neurons, typically have projections called dendrites, which receive stimulation, and axons, which pass the message on. The dendrites of afferent nerves, extend from the central nervous system to every part of the body; messages travel up these dendrites to the brain to report what the body is feeling and doing. At the same time, efferent nerves, with extra-long axons, send impulses and instructions from the central nervous system back to the muscles, glands, and other organs. Interneurons, which have short axons or none at all, organize and regulate transmissions between nerve cells. The hypothalamus is important because it is connected to just about everything else. Its nerves extend throughout the brain, and it secretes several hormones. The oldest source of knowledge about the brain is the study of people who have suffered head injuries.
