Ectotympanic
(Redirected from Tympanic ring)
The ectotympanic, or tympanicum, is a bony structure found in all mammals, located on the tympanic part of the temporal bone, which holds the tympanic membrane (eardrum) in place. In catarrhine primates (including humans), it takes a tube-shape.[1][2] Its position and attachment to the skull vary between primates, and can be either inside or outside the auditory bulla.[3][4]
It is homologous with the angular bone of non-mammalian tetrapods. When the latter is present, it contacts the entotympanic.[5]
References
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External links
[edit | edit source]- webref: Anthropology Archived 2012-02-12 at the Wayback Machine
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