PSY100H1 Lecture Notes - Lecture 3: Peripheral Nervous System, Autonomic Nervous System, Somatic Nervous System
6 Feb 2014
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PSY100H1 Full Course Notes
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Document Summary
Cannot separate genetic influences from environmental influences. Epigenetics: changes in gene expression because of non-genetic influences. Study of impact of genetic vs. environmental influences. Monozygotic twins raised together vs. apart: shared genes" and shared" environment less similar than raised apart, whereas those twins that were raised apart were very similar in many aspects. Heredity genetic transmission from parents to offspring. Heritability estimate of genetic portion of variation in some certain trait. Single cause explanation may be accurate but incomplete. Behaviour governed by complex network of interacting factors: heredity, biology, environment, culture. 1 cm3 = 50 million nerve cells: central nervous system (cnp) Spinal cord & brain: the peripheral nervous system. Sends info to cns and responds to messages from cns. Controls function that are under conscious voluntary control. Mainly motor neurons efferent pathway sending signals from brain to muscles. Sensory neurons send signals to brain: muscle/skin/joints (cid:0) cns (sensory neurons, afferent pathway)
