What are zygomatic arches

zygomatic arch, bridge of bone extending from the temporal bone at the side of the head around to the maxilla (upper jawbone) in front and including the zygomatic (cheek) bone as a major portion. … The zygomatic arch is particularly large and robust in herbivorous animals, including baboons and apes.

What is created by the zygomatic arch?

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 …

What muscle attaches to the zygomatic arch?

The bony junction between the temporal process of the zygoma and the zygomatic process of the temporal bone constitutes the zygomatic arch. The temporal fascia and masseter muscle are attached to the arch.

What does the zygomatic arch articulate with?

In the human skull, the zygomatic bone (cheekbone or malar bone) is a paired irregular bone which articulates with the maxilla, the temporal bone, the sphenoid bone and the frontal bone.

What is the difference between the zygomatic process and the zygomatic arch?

The zygomatic arch is formed from parts of both the zygomatic bone and the temporal bone. The extension of the temporal bone is known specifically as the zygomatic process, and attaches directly to the similarly shaped process on the zygomatic bone.

What does the mastoid process do?

Mastoid Process Function The mastoid process’ main function is to provide an area of attachment to several important muscles in the head. For instance, it is the attachment site of certain muscles of the neck: Sternocleidomastoid muscle – enables the rotation of the head to the contralateral side.

Which statement correctly describes the zygomatic arch?

Which statement correctly describes the zygomatic arch? The arch is formed by the maxilla and zygomatic bones. The zygomatic bone has a temporal process.

What is a zygomatic arch fracture?

Zygomatic arch fractures After the nasal bone, the zygoma is the second most common bone of the face to be fractured. The group at highest risk is young males. Aetiology is usually blunt trauma to the cheek, such as involved in: Assault. Road traffic accidents.

What structures contribute to the zygomatic arch quizlet?

Together, the zygomatic bone and the temporal bone form the zygomatic arch.

What muscle inserts on the mastoid process?

The mastoid process is part of the temporal bone. It is the insertion for the sternocleidomastoid muscle. In fact it is this muscle that causes this landmark to develop.

Article first time published on

In what way does a throat infection involve the mastoid?

Your eustachian tube connects your middle ear to the back of your throat. If an infection develops in your middle ear and blocks your eustachian tube, it may subsequently lead to an infection in the mastoid bone. This serious infection is known as mastoid bone infection of the skull, or mastoiditis.

What part of the skull is weakest?

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.

Which are parts of the ethmoid bone?

The ethmoid bone is an anterior cranial bone located between the eyes. It contributes to the medial wall of the orbit, the nasal cavity, and the nasal septum. The ethmoid has three parts: cribriform plate, ethmoidal labyrinth, and perpendicular plate.

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.

Which of the following is not part of the ethmoid bone?

The following is not part of the ethmoid bone b) greater wing. The ethmoid bone is a small, single bone located in the middle of the facial region…

What mastoid means?

Definition of mastoid (Entry 1 of 2) 1 : being the process of the temporal bone behind the ear also : being any of several bony elements that occupy a similar position in the skull of lower vertebrates. 2 : of, relating to, or occurring in the region of the mastoid process. mastoid.

Where in the body is the mastoid bone?

The mastoid is located just behind the ear. Mastoiditis is an infection of the bony air cells in the mastoid bone, located just behind the ear.

Is mastoiditis contagious?

Ear infections are the most common cause of mastoiditis. When a person does not receive antibiotics for mastoiditis, the bacteria can spread. If people stop taking antibiotics too soon, this can also allow the infection to spread.

Which of the following bones makes up part of the zygomatic arch?

The cranial portion of the zygomatic arch is formed by the zygomatic bone, and the caudal portion is formed by the zygomatic process of the temporal bone. The zygomatic arch forms the ventral and lateral rim of the orbit.

Which bone forms part of the zygomatic arch?

The zygomatic bone extends backward to meet the zygomatic process of the temporal bone, forming the zygomatic arch.

Which of the following bones forms part of the zygomatic arch?

Together, the zygomatic bone and the temporal bone form the zygomatic arch.

Can a zygomatic fracture heal on its own?

Zygomatic complex fractures with no or minimal displacement are often treated without surgical intervention, whereas fractures with functional or esthetic impairments in the form of diplopia, extraocular muscle entrapment, malocclusion, restricted mouth opening and/or depression of the malar prominence often …

Where is a zygomatic arch fracture?

CLINICAL QUESTION/LEVEL OF EVIDENCE: The zygomatic arch is important for facial width and projection. Isolated arch fractures typically occur from a single blow to the lateral cheek. If the fractures are left untreated, facial contour asymmetry, functional deficits, and psychological consequences can develop.

Why does my zygomatic arch hurt?

Zygomatic arch pain is commonly reported by patients visiting the orofacial pain clinic and is majorly accepted to be caused by masseter muscle pain. But a variety of conditions may present as orofacial pain in the zygomatic arch region, including life-threatening diseases such as salivary gland tumors.

Which muscle has its origin on the zygomatic arch?

The masseter muscle provides powerful elevation and protrusion of the mandible by originating from the zygomatic arch and inserting along the angle and lateral surface of the mandible.

What muscle is right under your chin?

Submental spaceLatinSpatium submentaleAnatomical terminology

What muscles are under chin?

The digastric muscle, also referred to as the digastricus, is a small muscle situated under the jaw. The primary function of this muscle is to elevate the hyoid bone – a small, horseshoe shaped bone located between the thyroid cartilage and chin.

What are the symptoms of a mastoid infection?

• redness, tenderness and pain behind the ear.
• swelling behind the ear that can cause it to stick out.
• discharge from the ear.
• a high temperature, irritability and tiredness.
• headache.
• hearing loss in the affected ear.

What bacteria causes mastoiditis?

The most common are Streptococcus pneumoniae and Pseudomonas aeruginosa, as well as Staphylococcus aureus and nontypeable Haemophilus influenzae. Anaerobic organisms may also cause mastoiditis. However, the prevalence of bacterial organisms may be dependent on age and location.

What does a mastoid infection feel like?

Mastoiditis symptoms may include: Fever, irritability, and lethargy. Swelling of the ear lobe. Redness and tenderness behind the ear.

What lies deep Pterion?

The pterion is known as ‘the danger area’ on the skull for head injuries. This is because the bone is thin at this site and is grooved by vessels on its internal surface (or may even lie in a bony tunnel here). It is the anterior branch of the middle meningeal artery (and vein) that lies deep to the pterion.