1
OCCIPITOFRONTALIS
actions:
- occipitalis: draws scalp posteriorly
- frontalis: draws scalp anteriorly & elevates brows when looking up
2
SUPRAHYOID GROUP ATTACHMENTS
- to the top of the hyoid bone
- affects tongue movement
- weak synergist flexors of the neck @ spinal joints
3
TEMPORALIS
- action: elevates / retracts mandible at the TMJ
4
LATERAL PTERYGOID & TMJ SYNDROME
- entire muscle: sphenoid bone
- actions: protracts the mandible @ the TMJ; contralaterally deviates the mandible @ the TMJ
- insertion: mandible & the TMJ
- superior head: the capsule and articular disc of TMJ
- TMJ syndrome a group of symptoms
5
SCALENES
- origin: anterior tubercles of TP's (transverse process)
- anterior: ORIGIN = C3-C6. INSERTION = 1ST RIB
- middle: ORIGIN = C2-C7 I NSERTION = 1ST RIB
- posterior: ORIGIN = C5-C7 INSERTION = 2ND RIB
6
SCM (STERNOCLEIDOMASTOID)
- sternal head - anterior sup surface of the manubrium of the sternum
- clavicular head - medial 1/3 of clavicle
- insertions: mastoid process of temporal bone & lateral 1/3 of the sup nuch line of the occipital bone
- stretch: contract, eccentric