USMLE Step 1 Neuroanatomy Review 26 03 Hypothalamus (1_6)

USMLE Step 1 Neuroanatomy Review 26 03 Hypothalamus (1_6)

 

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Play USMLE Audio MP3 26 03 Hypothalamus (1-6) Below

 

Begin 26 03 Hypothalamus (1-6) Transcription

Part 6, the hypothalamus. Please refer to figure 6.1 for this section.

The hypothalamus is a division of what brain structure?

  • The diencephalon.

Where is the hypothalamus located?

  • It is located beneath the thalamus on either side of the third ventricle.

The hypothalamus is involved in the maintenance of what overall function? In the maintenance of homeostasis.

Now the hypothalamus is involved in the maintenance of homeostasis through regulation of what two systems?

  • The autonomic nervous system and the endocrine.

Now the hypothalamus can be divided into two major groups depending upon their action on two different parts of the nervous system.

What are these two major divisions of the hypothalamic nuclei?

The anterior hypothalamic nuclei and the posterior hypothalamic nuclei.

The anterior hypothalamic nuclei have what effect on which nervous system?

  • The anterior hypothalamic nuclei have an excitatory effect on the parasympathetic nervous system.

The posterior hypothalamic nuclei have what effect on which nervous system?

  • The psosterior hypothalamic nuclei have an excitatory effect on the sympathetic nervous system.

 

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