USMLE Step 1 Neuroanatomy Review 26 05 Hypothalamus (3_6)

USMLE Step 1 Neuroanatomy Review 26 05 Hypothalamus (3_6)

 

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Play USMLE Audio MP3 26 05 Hypothalamus (3_6) Below

Begin 26 05 Hypothalamus (3_6) Transcription

Now there are four supraoptic nuclei in the supraoptic region. Student doctor, please name these four supraoptic nuclei.

First, the suprachiasmic nucleus.

Second, the anterior nucleus.

Third, the paraventricular nucleus,

and fourth, the supraoptic nucleus.

Student doctor, please pause if you wish and describe the function of suprachiasmic nucleus in the supraoptic region. The suprachiasmic nucleus is involved in the control of circadian rhythm, for example the secretion of melatonin and ACTH, body temperature rhythm and sleep-wake cycle.

Student doctor, what is the function of the anterior nucleus in the supraoptic region?

  • The anterior nucleus in the supraoptic region is involved in maintenance of body temperature.

Student doctor, what would be the result of a lesion to the anterior nucleus in the supraoptic region?

  • A lesion to the anterior nucleus in the supraoptic region would result in hyperthermia.

Student doctor, what is the function of the supraoptic nuclei in the supraoptic region?

  • The supraoptic nuclei are involved in the synthesis of ADH and oxytocin.

Student doctor, please pause and describe the function of the medial division of the paraventricular nuclei in the supraoptic region.

The medial division of the paraventricular nuclei in the supraoptic region is involved in the synthesis of corticotrophin releasing factor, thyroxin releasing hormone, somatostatin, and dopamine.

Now please pause if you wish again, and describe the function of the intermedial division of the paraverntricular nuclei in the supraoptic region.

The intermedial division of the paraverntricular nuclei in the supraoptic region is involved in the production of oxytocin and vasopressin.

 

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