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muscle actions
anterior neck and face
Term | Definition |
---|---|
Sternocleidomastoid | Together: flexes neck assists in head extension Individually: flexes laterally rotates neck |
Scalenes | Together: flexes neck Individually: rotates neck flexes neck assist in respiration |
Longus colli | flexes neck lateral flexion |
Longus capitis | flexes head and cervical spine |
Infrahyoids | depresses and elevates hyoid bone |
Levator scapula | rotates neck lateral flexion extends neck |
Frontalis (occipitofrontalis) | moves scalp raises eyebrows |
Corrugator supercilii | brings eyebrows down and together |
Buccinator | "compresses cheeks" (for whistling or blowing) |
Orbicularis occuli | closes eyes |
Zygomaticus (major and minor) | draws mouth up and back |
Nasalis | enlarges nostrils |
Orbicularis oris | presses lips together and pushes out |
Temporalis | elevates mandible retracts mandible |
Masseter | elevates mandible mastication jaw protrusion |
Pterygoids | draws lower jaw forward and sideways |