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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 |