What is the petrous part of temporal bone?
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.
Which type of brain hemorrhage is most commonly associated with a temporal bone fracture?
Subdural hematoma was the most prevalent type of bleed (55.6%).
What comprises the internal surface of the petrous part of temporal bone?
Gross anatomy The petrous temporal bone has three surfaces—anterior, posterior and inferior: the anterior surface forms the posterior part of the middle cranial fossa. Laterally, it is continuous with the inner surface of the squamous part united by the petrosquamous suture.
What is a bilateral temporal bone fracture?
Temporal bone fracture is suggested by Battle sign (post-auricular ecchymosis) and bleeding from the external auditory canal. As the fracture can sometimes involve the ossicles, inner ear and facial nerve, symptoms such as hearing loss, vertigo, balance disturbance, or facial paralysis may be present.
What is the function of temporal bone in ear?
The temporal bone surrounds the ears and protects nerves and structures that play a role in controlling hearing and balance. Sound enters the ear canal and makes the tiny bones (ossicles) inside the ear vibrate.
How long does it take a temporal bone fracture to heal?
It could take a month or more to fully heal. It may take 6-8 weeks for the bruising around the temporal nerve to go away. A repeat hearing test and follow-up with Ear, Nose and Throat (ENT) clinic may be required after you have healed.
What is the function of temporal bone?
The temporal bone is a thick, hard bone that forms part of the side and base of the skull. This bone protects nerves and structures in the ear that control hearing and balance.
What nerve goes through temporal bone?
Nerves of the meatus The vagus nerve, by its auricular branch that separates from it just beneath the cranial base. It then runs in an osseous canal nestled in the petrous part of the temporal bone (mastoid canaliculus) and gives off a small branch to the facial nerve.
What happens if you break your temporal bone?
A temporal bone fracture may cause facial paralysis, hearing loss, bruising behind the ear, and bleeding from the ear. Doctors use computed tomography (CT) to diagnose temporal bone fractures. Treatment, sometimes including surgery, is needed if the fracture causes problems.
What causes a petrous fracture of the temporal bone?
Abstract Fractures of the petrous part of the temporal bone are a common lesion of the base of the skull; most of these fractures result from high-energy trauma.
What is the shape of the petrous bone?
The petrous temporal bone has a pyramidal shape with an apex and a base as well as three surfaces and angles: apex (petrous apex) direct medially; articulates with the posterior aspect of the greater wing of the sphenoid and basilar occiput base directed laterally and fuses with the internal surface of squama temporalis and mastoid
Can a CT scan detect a petrous bone fracture?
In patients with multiple trauma, these injuries can be detected on CT scans of the head and neck, where the direct and indirect signs are usually … Fractures of the petrous part of the temporal bone are a common lesion of the base of the skull; most of these fractures result from high-energy trauma.
Which is the most common site of metastasis in the temporal bone?
Metastasis. The petrous apex is the most common site for metastases in the temporal bone (83% of cases) and is the sole site of temporal bone involvement in 31% of cases. The most common tumor to metastasize to the petrous apex is breast cancer, followed by lung, prostate, and renal cell carcinomas ( 4 ).