Temporal bone

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Temporal bone (left) of the person to which the temporal bone also belongs

The temporal bone or the temporal bone pyramid ( pars petrosa [ossis temporalis] , petrosum , outdated also pyramis ) is the hardest bone of the mammalian and human skull and a section of the temporal bone ( os temporale ). It surrounds the inner ear (labyrinth).

Sometimes, especially in animal anatomy, the pars tympanica , which surrounds the middle ear , and the pars mastoidea of the temporal bone are also included in the temporal bone pyramid.

The nervus facialis and the nervus tympanicus , among others, pass through the petrous pyramid . On the front surface (in animals the inner surface) there is a shallow pit for the trigeminal ganglion .


Temporal bone pyramid of humans (marked in green)
Skull of a sheep
Os temporale marked in violet, petrous pyramid bordered in blue

The temporal bone has three important accesses:

A fissure ( fissura petrotympanica ) between the temporal bone and the tympanic part ( pars tympanica ) of the temporal bone serves for the exit of the timpani cord ( chorda tympani ).

Stylus process (
processus styloideus ) on a human specimen. The ear canal can be seen above

In some mammals (e.g. humans , horses , cattle ) the hyoid bone is attached to the stylus process ( processus styloideus ) of the temporal bone by ligament .

See also

Web links

Commons : Temporal Bone  - Collection of images, videos, and audio files
Wiktionary: temporal bone  - explanations of meanings, word origins, synonyms, translations