PSYC 4130 1st Edition Lecture 21 Outline of Last Lecture I Helen Fisher Ted Talk II VTA Outline of Current Lecture I Sexual Orientation Biomarkers II Neural control of sexual behavior III Review Current Lecture Sexual Orientation Biomarkers Digit length ratios o 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 androgens o 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 preoptic area of the hypothalamus POA the midbrain PAG the hindbrain nucleus paragigantocellularlis nPGi and the lumbar spina cord These 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 mammals o 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 cord o 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 Sympathomimetic o 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 Alloprognelalone
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