What is temporal bone

The temporal bones are paired bones that help make up the sides and base of the skull (cranium). This places them lateral—to the side of—the temporal lobes of the brain’s cerebral cortex, ensuring that the cranium is properly supported and protecting the important structures there.

What is attached to the temporal bone?

The temporal bone serves as a point of attachment for many muscles. Due to the involvement of the temporal bone in forming the temporomandibular joint (i.e. joint of the jaw) some fibres from muscles of mastication such as the temporalis and masseter muscles attach to the temporal bone.

What are the 3 processes of the temporal bone?

This lesson will explore the processes of the temporal bone: the zygomatic process, the mastoid process and the styloid process.

What happens if the temporal bone is damaged?

Temporal bone fractures can occur after severe blunt trauma to the head and sometimes involve structures of the ear, causing hearing loss, vertigo, balance disturbance, or facial paralysis.

Why is it called temporal bone?

Etymology. Its exact etymology is unknown. It is thought to be from the Old French temporal meaning “earthly,” which is directly from the Latin tempus meaning “time, proper time or season.” Temporal bones are situated on the sides of the skull, where grey hairs usually appear early on.

Which bone is superior to the temporal bone?

Lateral to the arcuate eminences is the tegmen, a thin plate of bone roofing the mastoid antrum, epitympanic area, and external acoustic meatus. The temporal bone articulates anteriorly with the sphenoid bone, above with the parietal bone, and posteriorly with the occipital bone.

What is the temporal process?

Medical Definition of temporal process : a process of the zygomatic bone that with the zygomatic process of the temporal bone with which it articulates laterally forms part of the zygomatic arch.

What shape is the temporal bone?

The petrous part of the temporal bone or petrous temporal bone is part of the skull base, situated between the paired sphenoid bone and singular occipital bone. It has a pyramid shape with a base and an apex.

Is temporal bone a facial bone?

The bones that make up the neurocranium are the singular occipital, frontal, sphenoid, and ethmoid bones, and the paired temporal and parietal bones. The neurocranium is, therefore, composed of eight bones. As we have already seen, the facial bones sometimes include the sphenoid and ethmoid bones, and sometimes not.

What part of brain does temporal bone protect?

The temporal bones are two major bones in the skull, or cranium. They help form the sides and base of the skull, where they protect the temporal lobe of the brain and surround the ear canal.

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Can temporal bone cause deafness?

A temporal bone fracture may cause facial paralysis, hearing loss, bruising behind the ear, and bleeding from the ear.

What muscles are attached to the temporal bone?

Muscular attachments The temporalis muscle originates from the temporal fossa, which is formed partially by the lateral aspect of the temporal bone. The sternocleidomastoid, splenius capitis, longissimus capitis and digastric are all attached to the mastoid process of the temporal bone.

What is the weakest part of the skull?

Clinical significance The pterion is known as the weakest part of the skull. The anterior division of the middle meningeal artery runs underneath the pterion. Consequently, a traumatic blow to the pterion may rupture the middle meningeal artery causing an epidural haematoma.

Is Temporal Bone a flat bone?

No, the temporal bone is not a flat bone. Instead, it is usually classified as an irregular bone due to its unusual shape.

What foramina are present in the temporal bone?

BoneCranial fossaForaminatemporalmiddle cranial fossacarotid canaltemporalposterior cranial fossainternal acoustic meatustemporalposterior cranial fossajugular foramentemporalposterior cranial fossastylomastoid foramen

How thick is the temporal bone?

Bone thickness ranged between 1 and 8 mm across all age groups. In the group 5 to 6 years, the average temporal bone thickness was 3.42 ± 1.16 mm. Also in our study, a similar range of bone thicknesses was observed in the younger age groups.

Which part of the temporal bone is related with hearing and balancing?

Internal Ear. The internal ear contains the auditory apparatus for hearing and vestibular apparatus for balance. It is embedded within the petrous part of the temporal bone and consists of the membranous labyrinth which is suspended within similarly shaped bony labyrinth.

Is mastoid part of temporal bone?

The mastoid process is a pyramidal bony projection from the posterior section of the temporal bone. … The posterior border articulates with the occipital bone, and the anterior border is merged with the descending portion of the squamous section of the temporal bone.

What is a ethmoid bone?

The ethmoid bone is an unpaired cranial bone that is a significant component of the upper nasal cavity and the nasal septum. The ethmoid bone also constitutes the medial orbit wall.

Is the zygomatic arch part of the temporal bone?

In anatomy, the zygomatic arch, or cheek bone, is a part of the skull formed by the zygomatic process of the temporal bone (a bone extending forward from the side of the skull, over the opening of the ear) and the temporal process of the zygomatic bone (the side of the cheekbone), the two being united by an oblique …

Which bone has a prominent head?

Occipital boneHuman skull (Occipital bone is at bottom right).Position of occipital bone (shown in green)DetailsArticulationsthe two parietals, the two temporals, the sphenoid, and the atlas

What are the main important markings of the temporal bones?

• Squamous part. Located inferior to the squamous suture.
• Zygomatic process. Located at squamous part; a bridge like projection that articulates with the zygomatic bone.
• Mandibular fossa. …
• Tympanic part. …
• External acoustic meatus. …
• Styloid process. …
• Petrous part. …
• Jugular foramen.

What are the key landmarks of the temporal bone?

The surface landmarks on the squamous portion: 1, temporal fossa; 2, supra-meatal crest; 3, temporal line; 4, external acoustic meatus; 5, supra-meatal triangle (Macewen’s triangle); 6, middle temporal artery; 7, squamo-mastoid suture; 8, mandibular fossa (glenoid fossa); 9, articular eminence; 10, zygomatic process; …

Which bones protect the brain?

The skull protects the brain and forms the shape of the face. The spinal cord, a pathway for messages between the brain and the body, is protected by the backbone, or spinal column.

What are the 7 facial bones?

Facial Bones. The viscerocranium (face) includes these bones: vomer, 2 inferior nasal conchae, 2 nasals, maxilla, mandible, palatine, 2 zygomatics, and 2 lacrimals.

What is nose bone?

The nasal bones are two oblong halves that meet to form the bridge of your nose. … The nasal bones along with the frontal processes of the maxilla make up one of three nasal vaults, known as the bony vault.

What causes thinning of the temporal bone?

It can also be caused from certain infections as well as head trauma. Many believe that it is multifactorial in that there may be a congenitally thin area of bone that is then susceptible to trauma or infections, or may simply thin further with aging.

How do you manage a temporal bone fracture?

When the fracture extends to the otic capsule and subsequent profound SNHL occurs, complete mastoidectomy and obliteration of the mastoid with abdominal fat graft, middle ear, and EAC overclosure are recommended.

Who treats temporal bone fracture?

Therefore, neurosurgeons, neurologists, and emergency physicians should be trained to assess the 2 most important aspects of temporal bone fractures: status of the external canal (checking for blood or CSF) and status of the facial nerve.

How do you manage hemotympanum?

The treatment of an uncomplicated hemotympanum is usually conservative. Antibiotics may be prescribed for infection prophylaxis. A myringotomy tube may be needed for patients with persistent effusion to prevent long-term complications.

What if my ears are ringing?

Ringing in your ears, or tinnitus, starts in your inner ear. Most often, it is caused by damage to or the loss of sensory hair cells in the cochlea, or the inner ear. Tinnitus can present in many different ways, including sounds related to the ocean, ringing, buzzing, clicking, hissing or whooshing.