PSYCH 450 Lecture Notes - Lecture 17: Limbic System, Social Inhibition, Prosimian
03/20/18 lecture 17: Pregnancy, parturition, and motherhood
• What affects testosterone levels
o Alpha and beta were heavier and showed a testosterone increase
o Study with men on a soccer team
▪ Testosterone levels are higher when they are playing at home
o The time of day
▪ When the samples are collected matters because testosterone levels are
highest at night time
▪ Larger testosterone differences at night
▪ Less variation during the afternoon
• Tissues with hormones
o Blood
o Saliva = 1/10
o Urine - metabolites
o Fecal - metabolites
o Hair - longer time frame
• Study by Jacinta Beehner from University of Michigan
o Gelada baboon urine samples collected
o Females miscarry if there is a male takeover
o I odets, this is alled The Bue Effet
• Tamarin
o Daughtes do’t yle ad do’t get pregnant
• Reproductive Suppression in Marmosets and Tamarins
o Social inhibition and by odor cues
o Limbic area -> GABA -> hypothalamus -> GnRH -> FSH and LH -> ovary (estrogen
and progesterone)
• Limbic system
o Amygdala: emotion, hippocampus: memory, pituitary gland, hypothalamus
o Called limbic system because is in a ring-shaped
• Reproductive Zeitgebers
o Dry: mating, wet: babies, dry: mating
• Pregnancy
o Duration
▪ Prosimian: 2-4 months
▪ Monkeys: 5.5-7 months
▪ Apes: 8 months
▪ Humans: 9 months
o Two -> one: k-selected species (not a r-selected species)
o Twinning in rhesus monkey rare (1:2000), less than humans (1 in 60-80 births)
o Epitheliochorial placenta
• Pregnancy easier on chimps since have C-shaped vertebral column compared to S-
shaped in humans
• Pregnancy
find more resources at oneclass.com
find more resources at oneclass.com
