A deep bursa between the temporalis muscle and the lateral surface of the greater wing of the sphenoid and squamous temporal bone, reducing friction during jaw opening and closing as the temporalis slides over the bony temporal fossa floor.
Temporalis deep bursitis contributes to temporal headache and jaw pain syndromes, particularly in patients with bruxism and temporomandibular joint dysfunction. Deep temporal nerve block targets the deep temporal space adjacent to this bursa. Temporal space infection (deep temporal space abscess) from odontogenic sources tracks into this potential space, producing trismus and temporal swelling.
Odontogenic infection spreading from an upper molar into the deep temporal space between the temporalis and the temporal bone, producing severe trismus, temporal swelling, and the potential for intracranial spread.
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