Mammillary bodies

Last revised by Yahya Baba on 10 Oct 2021

The mammillary bodies, also spelled mamillary bodies, form part of the hypothalamus and have a role in memory, although their exact role is yet to be established. 

Mamillary can be spelled with either one or two ms. The former (mamillary) tends to be more common in UK spelling, whereas the latter (mammillary) is more common in the US 3

The mammillary bodies are round, paired structures that are a relay in the Papez circuit and lie in the inferior hypothalamus. They are separated in the midline by the intermammillary sulcus. 

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