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The petrous part of the temporal bone is pyramid-shaped and is wedged in at the base of the skull between the sphenoid and occipital bones. Directed medially, forward, and a little upward, it presents a base, an apex, three surfaces, and three angles, and houses in its interior the components of the inner ear.
The petrous part is a wedge shaped mass of bone located between the sphenoid and occipital bones within the cranial cavity. It is the most medial part of the temporal bone, and it is the landmark dividing the middle and posterior cranial fossae from each other. It has a base, an apex and three surfaces: anterior, posterior and inferior.
The petrous part of the temporal bone, also known as the petrous temporal bone (PTB), petrous pyramid, or petrous face 5, forms the part of skull base between the sphenoid and occipital bones.
These are hollowed out areas within the temporal bone. They act as a reservoir of air, equalising the pressure within the middle ear in the case of auditory tube dysfunction. The mastoid air cells can also become infected, known as mastoiditis. The petrous part is pyramidal shaped, and lies at the base of temporal bone. It contains the inner ear.
Each temporal bone is composed of five osseous parts: the squamous, mastoid, petrous, tympanic, and styloid portions. Several intrinsic channels, intrinsic fissures, and extrinsic sutures are often apparent on CT images and can mimic fractures (pseudofractures) ( 1 ).
The temporal bone is composed of five parts: the squama, the petrous, mastoid, and tympanic parts, as well as the styloid process. These parts attach to muscles involved in chewing and other functions.
The petrous part of temporal bone has a triangular or pyramid-like shape, with its apex directed forward and inward, and its base facing outward and to the side. Positioned between the sphenoid bone's greater wing and the basilar portion of the occipital bone, this pyramidal portion of the temporal bone features three surfaces—anterior ...
The temporal bone is comprised of four distinct osseous segments including tympanic, mastoid, petrous, and squamous. The pinna attaches to the lateral surface of the temporal bone and opens up into the external auditory canal (EAC), which is an S-shaped tube that has a cartilaginous and osseous component.
The petrous part of the temporal bone is a pyramidal-shaped ridge, with its wider base near the squamosal and mastoid portions of the bone and its smaller apex located anteromedially. It forms the posterior and anterior portions of the middle and posterior cranial fossae, respectively.