PSYC 4130 1st Edition Lecture 21 Outline of Last Lecture I. Helen Fisher- Ted TalkII. VTAOutline of Current Lecture I. Sexual Orientation “Biomarkers”II. Neural control of sexual behaviorIII. ReviewCurrent Lecture Sexual Orientation “Biomarkers”- Digit length ratioso Straight men and gay women tend to have index fingers shorter than their ring fingers- Finger ridge density (left thumb and pinkie finger)o Increased density in gay men and straight women- Hair “whorl”o Gay men more likely than straight men to have a counterclockwise pattern - Gay men and straight women have an increased density of fingerprint ridges on the thumb and pinkie of the left hand- Birth order, male homosexuality and sensitization of mother’s immune system to androgenso i.e. 3rd 4th 5th male increased likelihood that her immune system will antagonize androgens and male wont be fully masculinized Neural Control of Sexual Behavior- Medial nucleus of amygdala play a big role- The most researched circuit involves connections b/w the medial amygdala, the preopticarea of the hypothalamus (POA), the midbrain PAG, the hindbrain nucleus paragigantocellularlis (nPGi) and the lumbar spina cordThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Controls sexual behaviors in both male and female mammalso Ex: penile and clitoral erection, mounting, thrusting, lordosis, orgasm- *MPA- in males is the main structure that is in the higher brain governing sexual responses (orgasm)- mAMYG MPA/VMH PAG & nPGi 5HT; Lumbar; 5HT spinal cordo Makes sure your not have an orgasm RIGHT NOW, inhibits sexual response- Anorgasmia- “without” orgasm (Prozac, Zoloft)o Enhancing serotonin levels in synapses of neurons projecting from nPGI, inhibits sexual response - Sympathomimetico Sympathetic fight or flight Robust response: cocaine, Adderall, meth Prevents arousal and/or orgasm to take place- During orgasm = reversal, sympathetic fight/flight response Review - Rat is consuming excess calories but losing weight = metabolic rate is very high, aka people/rats die without sleep- Temporal resolution: restricted time frame when brain activity and changes were taking place. EEG- spatial resolution- Study stuff on narcolepsy- breakdown of sleep attacks, cataplexy vs. sleep attacks (not the same thing, know specific differences)- REM, nondeclarative, procedural memory (REM more important for nondeclarative memories)- SWS= explicit memory, semantic info, episodic - Orexin, where is it = hypothalamus - Know Ach (higher = more alert)- Prob not serotonin- PGO waves; SRY - HPG axis- kisspeptin, gnhr, LH, FSH- Menstral cyckle-
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