Exam 3: Reproductive Behavior : Sex Part 2 Flashcards
pheromones
chemical signals that communicate between animals
- female mice can identify individual males by pheromones in urine
bruce effect
bruce effect
pregnancy termination due to pheromones from a different mate
vomeronasal organ (VNO)
specialized receptor cells in nose that detect pheromones (not odors)
VNO axons go to accessory olfactory bulb which projects to the _____ and ____
medial amygdala (mPOA) and hypothalamus (VMH)
mPOA or VMH integrates what?
hormonal and sensory information and coordinates motor patterns of copulation
- connection between smell and amygdala
female sex behavior needs to be…
turned on
it is off unless turned on
ventromedial nucleus of the hypothalamus (VMH)
essential for sexual behavior in females (lordosis response)
VMH afferents
vomeronasal organ (pheromones) and somatosensory system via amygdala
estrogen increases…
dendritic trees of neurons in VMH and stimulates production of progesterone receptors
what happens when VMH gets more dendrites
the system is more sexually receptive
VMH sends axons to the ____ which projects to the ____
periaqueductal gray in midbrain
medullary reticular formation (NPGi)
How does NPGi project to spinal cord
reticulospinal tract
What needs to happen to initiate sex in males
remove the brakes, needs to be disinhibited
What coordinates male copulatory behavior
medial preoptic area of hypothalamus (mPOA)
afferents of medial preoptic area of hypothalamus
vomeronasal organ (pheromones) and somatosensory system via amygdala