Hypothalamus and the Limbic Sytem

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  1. Together the hypothalamus and limbic system control what ?
    endocrine system the autonomic nervous system to maintain homeostasis.
  2. Hypothalamus and Limbic System what non - physical traits does these systems control ?
    Emotion and Motivated Behavior
  3. Hypothalamus and Limbic System name the for symptoms usually caused by these systems ?
    • Fever 
    • Anxiety 
    • Obesity 
    • Addiction
  4. What are the 5 functions of the Hypothalamus ?
    • Sex
    • Metabolism
    • Stress
    • Temperature
    • Blood Pressure
  5. What is the two cell types in the paraventricular nucleus ?
    –Parvocellular -hypothalamic releasing hormones, such as CRH.

    –Magnocellular - oxytocin and vasopressin
  6. What pathways deliver visceral information to the hypothalamus ?
    • CN: VII - Facial  
    • CN:IX  - glossopharyngeal  
    • CN:X - Vagus
  7. What pathways control autonomic responses?
    -hypothalamus, the parabrachial nucleus, the nucleus of the solitary tract, and neurons in the ventrolateral medulla.

    -Indirect control of autonomic responses originates from the cortex, amygdala , and the periqueductal gray matter.
  8. Neural Input and Hormonal Output: oxytocin release and lactation explain ?
    magnocellular > secrete oxytocin >  baby sucks mechanoreceptors > activate magnocellular hypothalamic neurons> releasing oxytocin > Oxytocin increases> myoepithelial > milk ejection.
  9. Servo-control system does what  ?
    • "Homeostasis"
    • Receives sensory information from external body–
    • Compares sensory information with biological set points.–
    • Adjusts an array of autonomic, endocrine and behavioral responses aimed at maintaining homeostasis
  10. What portion of the hypothalamus controls heat ?
    anterior hypothalamus
  11. Which portion of the hypothalamus controls heat conservation ?
    posterior hypothalamus
  12. What will lesions of the ventromedial hypothalamus produce ?
    hyperphagia and obesity.
  13. Lesions of the lateral hypothalamus produce ?
    Aphagia, leading to starvation. Stimulation produced the opposite effect of these lesions.
  14. Does the hypothalamus have both a “feeding center” and a “satiety center”. T or F ?
  15. Dopaminergic neurons > projecting from the substantia nigra >striatum > tegmental area to innervate parts of the limbic system. Dopaminergic neurons are thought to be important for reward processing and arousal, and therefore may affect feeding behavior...

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Hypothalamus and the Limbic Sytem
2014-02-19 07:47:28

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