| A | B |
|---|
| Elevate the mandible | Temporalis; Masseter; Medial Pterygoid |
| Retract the mandible | Temporalis; Digastric |
| Protract the mandible | Medial & Lateral Pterygoid; Masseter (assists) |
| Depress the mandible | Suprahyoids; Platysma (assists); Digastric (w/Hyoid bone fixed); |
| Tighten the fascia of the neck; Draw down corner of the mouth | Platysma |
| Anchor and retract the galea posteriorly | Occipitalis (Occipitofrontalis) |
| Raise the eyebrows and wrinkle the forehead | Frontalis (Occipitofrontalis) |
| (Unilaterally) Laterally deviate the mandible to the opposite side | Medial & Lateral Pterygoid |
| Depress the hyoid bone and thyroid cartilage | Infrahyoids |
| Elevate the tongue | Suprahyoids |
| Elevate the hyoid bone | Suprahyoids; Digastric (w/mandible fixed) |
