| A | B |
|---|
| Occipitofrontalis | elevates eyebrows, wrinkles forehead (look of surprise) |
| Masseter | elevation of mandible, protraction and lateral and medial excursion (chewing) |
| Orbicularis oris | protrudes the lips (kissing muscle) |
| Orbicularis oculi | closes eye |
| Trapezius | elevates and retracts scapula |
| Sartorius | aids in knee and hip flexion, abducts and laterally rotates thigh |
| Vastus medialis and lateralis | extends knee and flexion of leg at hip |
| Brachilais | flexion of arm at elbow |
| Brachioradialis | flexion of arm at elbow (pronation) |
| Temporalis | elevated and retracts mandible, lateral excursion (chewing) |
| Sternocleidomastoid | rotates and flexes atlantooccipital joint. Laterally flexes head and neck to same side, if both contract flexes the neck |
| Rectus Abdominis | flexes lumbar spine (sit ups) compresses abdomen (childbirth, urination and defecation) flexes trunk ipsilaterally |
| Iliopsoas | flexion of hip (marching) external rotation of leg at the hip |
| Pectoralis major | adducts arm in frontal plane, flexes shoulder in sagittal plane, horizontally adducts arm in transverse plane, medially rotates arm |
| Latissimus dorsi | adducts arm in frontal plane, extends arm at the shoulder in sagittal plane, horizontally abducts arm in transverse plane and medially rotates arm. |
| Deltoid | Flexes and extends arm at the shoulder, abducts arm at the shoulder, medially and laterally rotates arm. |
| Biceps brachii | flexes arm at the elbow, weakly flexes glenohumeral joint, supinates hand and forearm |
| Triceps brachii | extends arm at the elbow joint, adducts and extends glenohumeral joint |
| Extensor digitorum | extends digits 2-5 at MCP (metacarpophlangeal joint) |
| Flexor digitorum superficialis | flexes digits at MCP and PIP (proximal interphalangeal joint) flexes wrist, weak flexion of elbow |
| Gluteus Maximus | stabilizes trunk in hip extension, extension and external rotation of the hip, lower fibers assist in hip adduction |
| Rectus Femoris | extension of knee and flexion of hip |
| Biceps femoris | flexion of knee, extension of hip, external rotation of hip and knee |
| Gastrocnemius | plantar flexion of ankle, weak flexion of knee |
| Tibialis anterior | dorsiflexion of ankle and inversion of foot |
| Supraspinatus | stabilizes GHJ, weak abduction of GHJ |
| Infraspinatus | stabilizes GHJ, external rotation, horizontal abduction and extension of GHJ |
| Teres Minor | stabilizes GHJ, external rotation, horizontal abduction and extension of GHJ |
| Subscapularis | stabilizes GHJ. internal rotation, adduction and extension of GHJ |
