ANT211H5 Lecture Notes - Lecture 4: Sex Steroid, Motor Neuron, Sexual Differentiation
Document Summary
Lectures (4 lectures), readings (4 chapters), films (2) Subjective sense of sexual excitement or arousal. Inhibitory/ excitatory individuals response to a stimulus. In humans has a large component in culture. Depending on learned/socio cultural environment people. Occurs in a cyclic fashion: exposed to sexual stimulus response takes a number of different paths signal to cns lead to a peripheral biological response. Central brain mechanisms: neural signals, peripheral sexual responses, excitory, inhibitory, automatic, controlled. Cycle: receptor sensory neuron control center motor neuron. Pelvic thrusting copulatory behaviour only seen in males mounting common in adult males and adult females. Females lourdosis arch their back and lift their nose: easy access of the penis into the copulatory tract. Castrated at 1 day old no copulation: do not show normal thrusting behaviour. Castrated after 1 week will copulate with testosterone in adulthood: will have normal copulatory behaviour, there is an organizing dose even if they don"t get their activating dose they will still show.
