File:Hypothalamus histology 001.jpg

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Hypothalamus Histology - Paraventricular and Suprachiasmatic Nuclei

  • monkey hypothalamus (cross-section) either side of the 3rd ventricle.

Paraventricular Nucleus (PVN, PVA, or PVH)

  • lies beside the third ventricle.
  • highly vascularised.
  • neuroendocrine neurons extend into the median eminence and then into the posterior pituitary (neurohypophysis).
    • release oxytocin or vasopressin.

Suprachiasmatic Nucleus (SCN)

  • lies directly above the optic chasm.
  • involved in the control of circadian rhythms.
  • cells contain vasopressin, vasoactive intestinal peptide and neurotransmitters.


Links: PVN and SCN | Pituitary | Hypothalamus Development

Image source: John K. Young, Ph.D. (VMHman). This image of the monkey hypothalamus has not been previously published or copyrighted and is freely available to all who want to use it.

The copyright holder of this file, John K. Young, allows anyone to use it for any purpose, provided that the copyright holder is properly attributed. Redistribution, derivative work, commercial use, and all other use is permitted.

http://en.wikipedia.org/wiki/File:HIGHPVN.jpg

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current16:12, 12 May 2012Thumbnail for version as of 16:12, 12 May 2012500 × 405 (84 KB)Z8600021 (talk | contribs)==Hypothalamus Histology - A cross section of the monkey hypothalamus displays 2 of the major hypothalamic nuclei on either side of the fluid-filled 3rd ventricle. Category:Histology Category:Endocrine Category:Hypothalamus