Hypothalamic Nuclei

Question 2

Fxn/stimulus of ventromedial hypothalamic nucleus

Answer 2

• mediates satiety
  
  • destruction ==> hyperphagia
• stimulated by leptin

Question 3

Fxn/stimulus of lateral hypothalamic nucleus

Answer 3

• mediates hunger
  
  • destruction ==> anorexia
• inhibited by leptin

Question 4

Fxn of anterior hypothalamic nucleus

Answer 4

• mediates heat dissipation via parasympathetics
  
  • destruction ==> hyperthermia

Question 5

Fxn of posterior hypothalamic nucleus

Answer 5

• mediates heat conservation via sympathetics
  
  • destruction ==> hypothermia

Question 6

Fxn of arcuate hypothalamic nucleus

Answer 6

• secretion of hormones:
  
  • dopamine (inhibits prolactin)
  • GHRH
  • GnRH

Question 7

Fxn of paraventricular hypothalamic nucleus

Answer 7

• secretion of hormones:
  
  • ADH
  • CRH
  • Oxytocin
  • thyrotropin-releasing hormone

Question 8

Fxn of supraoptic hypothalamic nucleus

Answer 8

• secretion of hormones:
  
  • oxytocin
  • ADH

Question 9

Fxn of suprachiasmatic hypothalamic nucleus

Answer 9

• circadian rhythm
• pineal gland fxn