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MALE RAT

MALE RAT. Olfaction: pheromones (“attractants, primers”) Genital Sensations » spinothalamic tract - intromission Reflex (spinal): Erection » sacral: parasympathetic Ejaculation » lumbar: sympathetic

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MALE RAT

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  1. MALE RAT Olfaction: pheromones (“attractants, primers”) Genital Sensations » spinothalamic tract - intromission Reflex (spinal): Erection » sacral: parasympathetic Ejaculation » lumbar: sympathetic Inhibition: Midbrain/diencephalic junction (posterior mammillary body?) Facilitation: LMPO + sexually dimorphic n. LMPO » LAH » MFB (LH) » Red N. Red N. (extra- pyramidal motor) Lat. septum, amygdala - pyriform cortex (Klüver-Bucy) Motor cortex (precentral gyrus, frontal lobe)

  2. Beach (1950) 1. Sexual Arousal Mechanism (SAM): a) latency to first intromission b) refractory period after ejaculation PFC, cingulate, amygdala, n. accumbens (DA)— LMPO (testosterone), erection (parasymp) 2. Copulatory-ejaculatory Mechanism (CEM): number of intromissions required for ejaculations Spinothalamic tr., LMPO (testosterone), red n., ejaculation (symp), VTA, n. accumbens, lat. septum (DA)

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