Your browser is too old
We can't provide a great video experience on old browserUpdate now
To cope with the continuously increasing stress of medical students, sqadia.com is making variety of medical lectures on almost all the medical subjects. Talking about this lecture that is anatomy of temporal region, Warda Naz explains temporal region through medical definition. Then she tells that temporalis muscle, zygomaticotemporal nerve and deep temporal arteries are contents of temporal fossa. Masseter muscle, lateral pterygoid muscle, and medial pterygoid muscle are discussed under the muscles of mastication. Temporomandibular joint are the two joints connecting jawbone to the skull. Warda Naz also discusses the disorder of temporomandibular joint in this lecture.
Above the zygomatic arch there is a fan shaped space which is located on the lateral side of the skull is known as the temporal fossa. The floor of the temporal fossa is formed by the frontal and parietal bones superiorly and the greater wing of the sphenoid and squamous temporal inferiorly. Anthropometric landmark overlies anterior branch of middle meningeal artery and lateral fissure of cerebral hemisphere.
Contents of Temporal Fossa
Contents of temporal fossa are discussed in succession by the anatomy demonstrator Warda Naz. The temporalis muscle is a large fan-shaped muscle filling much of the temporal fossa. Next is the zygomaticotemporal nerve, derived from zygomatic nerve, a branch of the maxillary nerve. Deep temporal arteries are two in number i.e. anterior and posterior. They ascend between the temporalis and the pericranium.
The first layer is the skin which is a thin, movable and hairless in anterior part, and thick, less moveable and abundant of hairs in posterior part. Second layer is a subcutaneous fat layer. Third and fourth layers are superficial fascia and temporal fascia/aponeurosis respectively. Fifth Layer comprises subaponeurotic fat space. Temporal muscle supplied by deep temporal arteries is the sixth layer. Seventh layer is named as submuscular fat space. Eighth layer is periosteum. Lastly, ninth layer refers to the sponge layer of squamous part of temporal bone.
Muscles of Mastication
Muscles which have the ability of moving the mandible and acting on the temporomandibular joint is known as muscle of mastication. Masseter muscle originates from lower border and medial surface of zygomatic arch. Nerve to masseter are supplied from the anterior division of the mandibular nerve. Lateral pterygoid muscle is the largest component of the infratemporal fossa. Medial pterygoid muscle is the deepest of the four muscles of mastication. The temporalis muscle can be divided into 3 distinct areas according to fibers direction.
Temporomandibular joint are the two joints connecting jawbone to the skull. The articular disc is a fibrous extension of the capsule that runs between the two articular surfaces of the temporomandibular joint. Temporomandibular joint disorder (TMD) is discussed as in this disorder there is pain in the jaw around the ear with difficulty in jaw movement. Causes of temporomandibular joint disorder are also discussed.