WHAT IS TMJ ?
tempromandibular joint(TMJ) is a sliding and rotating ball &
socket joint located just in front of ear. Its consists of the temporal
bone (side of skull) and the mandible(lower jaw), hence the
named tempromandbular joint.
The temporal bone is the keystone of cranium, it has several major
foramina through which pass important vital structures. like Internal
Acoustic Meatus, Foramen lacerum, Foramen for auditory tube, portion
of jugular foramen, and total cranial nerve nine are in close proximity
to the temporal bone. Spasm of the sternocloidomastoid, splenius
capitus, longus capitus, and digastric muscles will induce
an internal temporal rotation. internal rotation of the temporal
bone follows a movement that is directly opposite to that of external
rotation the mastoid tips move inferiorly, anteriorly and laterally
while the super border border of the squma moves posteriorly
and medially. The condyle compensates in an anterior and lateral
position within fossa.
Common clinical symptoms attributed to temporal bone restriction
are conductive hearing loss, disequilibrium, head pain, vagotonia,
motor eye dysfunction(strabismus), dyslexia, recurrent arm
&shoulder pain syndromes.
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