Muscles 4
Internal abdominal obliques
Compresses abdomen
Decompresses abdomen
Latissimus dorsi action
Shoulder extension, adduction, medial rotation of humerus
Shoulder flexion, abduction, medial rotation of humerus
Levator scapulae action
Elevates and retracts scapula
Decompresses and retracts scapula
Massester action
Elevate the mandible
Decompress the mandible
Orbicularis oculi
Closes eye
Opens eye
Orbicularis oris
Closes lips
Opens lips
Pectineus action
Flexes the hip, abducts the leg
Flexes the hip, adducts the leg
Extends the leg, flexes the hip
Pectoralis major action
Flexion, adduction, and medial rotation of ribs
Flexion, abduction, and medial rotation of humerus
Flexion, adduction, and medial rotation of humerus
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