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Skeletal System
Functions of the muscles
| Muscle | Function |
|---|---|
| Frontalis | raises eyebrows |
| zygomaticus | pulls up corners of mouth |
| orbicularis oculi | closes eyes |
| occipitalis | assists in raising eyebrows |
| temporalis | closes jaw |
| masseter | clenches jaw |
| orbicularis oris | purses lips |
| buccinator | pulls in cheeks |
| mentalis | pulls down bottom lip |
| sternocleidomastoid | rotate/ flexes head/ nack |
| platysma | retracts jaw |
| pectoralis major | flexes shoulders, adducts arm, rotates shoulder |
| pectoralis minor | depresses scapula |
| rectus abdominis | flexes spine |
| external obliques | rotates trunk |
| serratus anterior | rotates scapula |
| trapezius | elevates scapula, rotates scapula |
| teres major/minor | adducts arm, rotates scapula |
| rhomboids | rotates scapula |
| latissimus dorsi | extension of arms, adduction, rotates humerus |
| deltoids | abducts arm, rotates arm |
| biceps brachii | flexes forearms, supinates forearm |
| triceps brachii | extension at elbow |
| brachialis | flexion at elbow |
| brachioradialis | flexion of wrist, pronates/supinates forearm |
| flexors | flexion of wrist |
| extensors | extension of wrist |
| gluteus maximus | extensions at hip, rotates hip |
| gluteus medias | abduction, rotates hip |
| tensor fasciae latae | abducts, rotates hip |
| sartorius | abducts, flexes hip |
| quadriceps | flexes at hip, extends at knee |
| adductors | adducts knee |
| gracilis | adducts leg, flexes at knee |
| hamstrings | extends at hip, flexes at knee |
| gastrocnemius | plantar flexion |
| tibilais anterior |