Anterior Posterior
Temporalis Elevates & retracts mandible Masseter Elevates mandible Sternocleidomastoid Neck flexion Trapezius Elevates & depresses shoulders
Masseter Elevates mandible Temporalis Elevates & retracts mandible
Sternocleidomastoid Flexes neck Scalenes Elevate 1 st 2 ribs Flex & rotate neck
Pectoralis minor With scapula fixed - draws rib cage superiorly With ribs fixed draws scapula forward & downward Deltoid Abducts, flexes & medially rotates arm Biceps brachii Flexes forearm Pectoralis major Flexes, medially rotates & adducts arm Serratus anterior Protracts scapula
Trapezius Sternocleidomastoid Deltoid Biceps brachii lateral head long head medial head Triceps brachii Extends forearm Brachialis Flexes forearm
Posterior Triceps brachii Extends forearm Latissimus dorsi Extends, adducts & medially rotates arm
Anterior Forearm biceps brachii Brachioradialis Flexes forearm - Best when forearm is partially flexed and semipronated Flexors Pronator teres Pronates forearm
Supinator Supinates forearm
Posterior Forearm Extensors
External Intercostals Elevate rib cage
Internal Intercostals Depress rib cage
Serratus anterior Protracts scapula External oblique Compresses abdomen Flexes vertebral column Internal oblique Compresses abdomen Flexes vertebral column Transversus abdominus Compresses abdominal contents Rectus abdominis Flexes & rotates lumbar vertebral column Increases intra-abdominal pressure
Trapezius Elevates & depresses shoulder Deltoid Abducts, flexes & medially rotates arm Latissimus dorsi Extends, adducts & medially rotates arm
Supraspinatus Abducts arm Stabilizes shoulder Prevents downward dislocation Infraspinatus Laterally rotates arm Stabilizes shoulder Teres minor Laterally rotates arm Stabilizes shoulder Teres major Posteromedially extends, medially rotates & adducts arm
Anterior Arm & Shoulder Coracobrachialis Flexes & adducts arm Subscapularis Medially rotates arm Stabilizes shoulder Brachioradialis Flexes forearm
supraspinatus infraspinatus teres minor subscapularis Rotator Cuff
Respiratory Diaphragm Flattens on contraction increasing vertical dimension of thorax
Pelvic Diaphragm Supports pelvic viscera coccygeus levator ani
Iliopsoas Flexes thigh iliacus psoas major Flexes trunk on thigh (bow) Postural muscle Sartorius Flexes, abducts & laterally rotates thigh (cross-legged position) Gracilis Adducts thigh Flexes & medially rotates leg
Pectineus Adducts, flexes & medially rotates thigh Tensor fasciae latae Abducts, flexes & medially rotates thigh Rectus femoris Flexes thigh Extends leg Adductor longus Adducts, flexes & medially rotates thigh Adductor magnus Anterior part - Adducts, flexes & medially rotates thigh Posterior part extends thigh
Pectineus (cut) Adducts, flexes & medially rotates thigh Adductor longus Adducts, flexes & medially rotates thigh Adductor magnus Anterior part Adducts, flexes & medially rotates thigh Posterior part Extends thigh
Vastus intermedius Extends leg Vastus lateralis Extends leg Stabilizes knee Vastus medialis Extends leg Stabilizes patella
Gluteus maximus Extends thigh Especially when thigh is flexed, as during climbing stairs Gluteus medius Abducts & medially rotates thigh Adductor magnus Anterior part - Adducts, flexes & medially rotates thigh Posterior part extends thigh Biceps femoris Extends thigh Flexes & laterally rotates leg Semitendinosus Extends thigh Flexes & medially rotates leg Semimembranosus Extends thigh Flexes & medially rotates leg
Gluteus medius Abducts & medially rotates thigh Gluteus maximus Extends thigh Especially when thigh is flexed, as during climbing stairs Gluteus minimus Abducts & medially rotates thigh
peroneus (fibularis) longus tibialis anterior gastrocnemius soleus extensor digitorum longus
Gastrocnemius Plantar flexes foot when leg is extended Flexes leg when when foot is dorsiflexed Soleus Plantarflexes foot Peroneus (fibularis) longus Plantar flexes & everts foot Tibialis anterior Dorsiflexes & inverts foot Extensor digitorum longus Extends toes Dorsiflexes foot
gastrocnemius
soleus gastrocnemius