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MABS Physiology > Functions of the Hypothalamus > Flashcards

Functions of the Hypothalamus Flashcards

1
Q

what structures are important in the function of the hypothalamus?

A

anterior preoptic region

posterior region

mid anterior and posterior region

paraventricular and anterior regions

supraoptic and paraventricular nuclei

anterior nuclei

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2
Q

what is the function of the anterior preoptic region?

A

maintains heat loss, maintains constant body temperature

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3
Q

what is the function of the posterior region?

A

maintains heat conservation, responds to temperature changes

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4
Q

what is the function of the midanterior and posterior region?

A

activate sympathetic nervous system

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5
Q

what is the function of the paraventricular and anterior region?

A

activate parasympathetic nervous system

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6
Q

what is the function of the supraoptic and paraventricular nuclei?

A

regulate water balance

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7
Q

what is the function of the anterior nuclei? what are the parts?

A

regulate appetite and food intake

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8
Q

what is the effect if a lesion develops in the anterior preoptic region of the hypothalamus?

A

central hyperthermia

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9
Q

what is the effect if a lesion develops in the posterior region of the hypothalamus?

A

hypothermia

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10
Q

what happens if a lesion develops in the supraoptic and paraventricular nuclei?

A

diabetes insipidus, also lack of thirst response resulting in hyponatremia

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11
Q

what is the effect if a lesion develops in the medial part of the anterior nuclei of the hypothalamus?

A

obesity

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12
Q

what is the effect if a lesion develops in the lateral part of the anterior nuclei of the hypothalamus?

A

anorexia and emaciation

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13
Q

what are the afferent connections of the hypothalamus?

A

fornix
medial forebrain
stria terminalis
peduncle of mamilary bodies

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14
Q

this afferent connection conveys afferent fibers from the hippocampus, it is an important fiber tract of the limbic system (passes anteriorly)

A

fornix

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15
Q

this afferent connection transmits afferent fibers from the olfactory areas to the preoptic nuclei (from the olfactory cortex)

A

medial forebrain

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16
Q

this afferent connection conveys afferent fibers from the amygdala (superior most portion of upper part of fornix)

A

stria terminalis

17
Q

this afferent connection transmits visceral afferent fibers

A

peduncle of mamillary bodies

18
Q

maintain constant body temperature

A

Anterior Preoptic region of Hypothalamus

19
Q

central hyperthermia

A

Lesion of the Anterior Preoptic Region of the hypothalamus

20
Q

Respond to temperature changes

A

Posterior Region of the Hypothalamus

21
Q

hypothermia

A

Lesion to posterior Region of the Hypothalamus

22
Q

activates the sympathetic nervous system

A

Midanterior and posterior region of the hypthalamus

23
Q

Activate the parasympathetic nervous system

A

Paraventricular and anterior regions of the hypothalamus

24
Q

regulates the release of gonadotropic hormones from the adenohypophysis sexual arousal

A

medial preoptic nucleus

25
Q

Circadian Rhythm

  • tells pineal gland to release melatonin
  • light sensitive proteins in retina signal this to alter production of pineal gland
A

suprachiastmatic nucleus

26
Q

secretes oxytocin

A

paraventricular nucleus

27
Q

secretes vasopressin and CRH

A

suproptic nucleus

28
Q

involved in feeding, reproductive, and parenting, thermoregulation

A

dorsomedial and ventromedial nuclei

29
Q

regulate appetite and food intake

A

Anterior Nuclei

30
Q

anorexia

A

Lesion to lateral Anterior nucleus

31
Q

obesity

A

Lesion to medial anterior nucleus

32
Q

involved in limbic forebrain and midbrain functional integration

A

Mammillary Body

MABS Physiology (57 decks)

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