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Latissimus dorsi
Action: Adducts, extends, internally rotates, and horizontally abducts the arm
Rhomboideus major
Action: Adduction and downward rotation of the scapula
Rhomboideus minor
Action: Adduction and downward rotation of the scapula
Teres minor
Action: External rotation and horizontal abduction of the arm
Levator scapulae
Action: Extension of neck, downward rotation and elevation of the scapulae
Trapezius
Action: Elevates, depresses (depends on area of muscle being activated), adducts and upwardly rotates the scapulae
Erector spinae
Action: Extension, lateral flexion and rotation of the head and neck
Shoulder, Chest and Arm Muscles
CHEST
Pectoralis major
Action: Adducts, flexes, extends (depends on fibers being recruited), internally rotates and horizontally adducts the arm
Pectoralis minor
Action: Depresses, protracts and downwardly rotates the scapulae
DELTOID
Anterior
Action: Abducts, flexion, internally rotates and horizontally adducts the arm
Medial
Action: Abducts the arm
Posterior
Action: Abducts, extends, externally rotates and horizontally abducts the arm
Coracobrachialis
Action: Flexes and horizontally adducts the arm
ROTATOR CUFF
Subscapularis
Action: Internally rotates the arm
Infraspinatus
Action: Externally rotates the arm
Teres Minor
Action: Externally rotates the arm
Supraspinatus
Action: Abduction of the arm
MUSCLES OF THE ARM
Biceps brachii
Action: Flexion of the elbow and shoulder, supination of the forearm
Brachialis
Action: Flexion of the elbow
Pronator teres
Action: Pronates the forearm
Triceps brachii
Action: Extends the elbow, adducts and extends the shoulder (long head)
Anconeus
Action: Extends the elbow
Supinator
Action: Supinates the forearm
Pronator quadratus
Action: Pronates the forearm
Flexor carpi radialis
Action: Flexes and abducts the wrist
Flexor carpi ulnaris
Action: Flexes and adducts the wrist
Palmaris longus
Action: Flexion of the wrist
Extensor carpi radialis longus
Action: Extends and adducts the wrist
Extensor digitorum
Action: Extends the wrist
QUADRICEPS
Rectus femoris
Action: hip flexion and knee extension
Vastus lateralis
Action: knee extension
Vastus medialis
Action: knee extension
Vastus Intermedius
Action: knee extension
OTHER
Sartorius
Action: flexion, external rotation, and abduction at the hip, flexion and internal rotation at the knee
Gracilis
Action: abduction, flexion, and internal rotation at the hip, internal rotation of the knee
Pectineus
Action: adduction, flexion, and horizontal adduction at the hip
Adductor longus
Action: adduction, flexion, and horizontal adduction at the hip
Adductor magnus
Action: adduction, flexion, and horizontal adduction at the hip
HAMSTRINGS
Semimembranosus
Action: extension a the hip, and flexion and internal rotation at the knee
Semitendinosus
Action: extension and internal rotation at the hip, flexion and internal rotation at the knee
Biceps Femoris
Action: extension at the hip, external rotation and flexion at the knee
Gluteus maximus
Action: extension, external rotation, horizontal abduction, and adduction at the hip
Gluteus medius
Action: abduction, horizontal abduction, internal rotation (anterior fibers), and external rotation (posterior fibers) at the hip
Gluteus minimus
Action: abduction, horizontal abduction, and internal rotation at the hip
LOWER LEG
Tibialis anterior
Action: dorsiflexion and inversion of the foot
Extensor digitorum longus
Action: dorsiflexion and eversion of the foot
Extensor hallucis longus
Action: inversion of the foot
Peroneus longus
Action: plantarflexion and eversion of the foot
Soleus
Action: plantarflexion
Gastrocnemius
Action: plantarflexion of the foot, flexion of the knee
TRUNK/ABDOMEN
Rectus abdominis
Action: flexion and lateral flexion of the trunk
External oblique
Action: flexion of the trunk, lateral flexion (same side), and rotation (opposite side)
Internal oblique
Action: flexion of the trunk, lateral flexion (same side), rotation (same side)
Serratus anterior
Action: protraction and upward rotation of the shoulder girdle
Tranversalis abdominis
Action: compresses the abdominal/pelvic cavity.