INAH 3

Interstitial nucleus of the anterior hypothalamus
Anatomical terms of neuroanatomy

INAH-3 is the short form for the third interstitial nucleus of the anterior hypothalamus, and is the sexually dimorphic nucleus of humans. The INAH-3 is significantly larger in males than in females regardless of age and larger in heterosexual males than in homosexual males and heterosexual females. Homologs of the INAH-3 have been found to play a direct role in sexual behavior in quails, rhesus macaques, sheep, rats, mice, and ferrets.

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