What surfaces of the greater wings of sphenoid bone are separated by infratemporal crest?
Anatomical terms of bone The lateral surface of the greater wing of the sphenoid is convex, and divided by a transverse ridge, the infratemporal crest, into two portions.
What is infratemporal crest?
Medical Definition of infratemporal crest : a transverse ridge on the outer surface of the greater wing of the sphenoid bone that divides it into a superior portion that contributes to the formation of the temporal fossa and an inferior portion that contributes to the formation of the infratemporal fossa.
What are surfaces of greater wing of sphenoid bone?
Gross Anatomy The greater wing of the sphenoid features superior, lateral and orbital surfaces. The superior surface features: foramen rotundum: transmits the maxillary branch of the trigeminal nerve.
What muscle attaches to infratemporal crest?
Lateral pterygoid muscle
Origin | Superior head: Infratemporal crest of greater wing of sphenoid bone Inferior head: Lateral surface of lateral pterygoid plate of sphenoid bone |
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Insertion | Superior head: Joint capsule of temporomandibular joint Inferior head: Pterygoid fovea on neck of condyloid process of mandible |
What is the most complex bone in the human body?
The sphenoid bone
The sphenoid bone is located at the central skull base and is commonly considered the most complex bone in the human body. It forms the major boundary between the intra- and extracranial structures and is a conduit for several cranial nerves.
How do you know if you have a sphenoid bone?
It is situated in the middle of the skull towards the front, in front of the basilar part of the occipital bone. The sphenoid bone is one of the seven bones that articulate to form the orbit. Its shape somewhat resembles that of a butterfly or bat with its wings extended.
What is medial pterygoid?
The medial pterygoid muscle, a major elevator of the jaw is a square-shaped masticatory muscle, located on the medial aspect of the lower jaw bilaterally. It is also known as internal pterygoid muscle. This muscle lies medial to the lateral pterygoid muscle.
What is the function of greater wing of sphenoid bone?
The greater wing extends from the sphenoid body in a lateral, superior and posterior direction. It contributes to three parts of the facial skeleton: Floor of the middle cranial fossa. Lateral wall of the skull.