Petrous Part Of Temporal Bone

Each temporal bone consists of four parts. The temporal bone is formed of five portions.

Anatomy Of Temporal Bone By Dr Vijay Kumar Amu

The petrous part of the temporal bone or more simply petrous temporal bone ptb forms the part of skull base between the sphenoid and occipital bones.

Petrous part of temporal bone. The squama which forms the lateral wall of the middle cranial fossa. The petrous which is the medial triangular portion that houses the inner ear the internal. The mastoid which is the aerated posterolateral portion and most frequently affected by trauma.

Gross anatomy the petrous temporal bone has a pyramidal shape with an apex and a base as we. The petrous part is a wedge shaped mass of bone located between the sphenoid and occipital bones within the cranial cavity. Called also petrous bone.

6 the temporal bone consists of three principal parts. 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 portion is among the most basal elements of the skull and forms part of. 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.

Some anatomists divide it into two separate subparts calling the posterior section the mastoid part reserving the term petrous part for the anterior section only and calling the entire area the petromastoid part. The temporal bone is ossified from eight centers exclusive of those for the internal ear and the tympanic ossicles. One for the squama including the zygomatic process one for the tympanic part four for the petrous and mastoid parts and two for the styloid process just before the end of prenatal development fig.

Os temporale is a paired bone situated at the lateral side and base of the skull the temporal bone features important structures of the vestibulocochlear apparatus including the external acoustic meatus the tympanic cavity and the structures of the inner ear. In describing the petrous part of the temporal bone bell notes there are two nerves that enter the internal auditory meatus the portio dura and the portio mollis the true nerve of hearing the portio dura emerges on the cheek and surely is the cranial nerve we call the fifth and he recognizes that it is no part of the organ of hearing. The temporal bone latin.

It has a base an apex and three surfaces. Petrous mastoid tympanic and squamous parts. Petrous part of temporal bone the part of the temporal bone located at the base of the cranium containing the inner ear.

The vestibulocochlear organ is embedded in the temporal bone which has complex anatomy. Anterior posterior and inferior.

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