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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 |