Pec major
Origin: Clavicular head: anterior surface of clavicle; Sternal head: anterior surface of sternum, ribs 1–6
Insertion: Lateral lip of the bicipital groove of humerus
Action: Adduction, medial rotation, flexion of shoulder
Innervation: Thoracoacromial artery
Blood Supply: Medial and lateral pectoral nerves (C5-T1)

Rectus Femoris
Origin: Anterior inferior iliac spine
Insertion: Patella via quadriceps tendon
Action: Extends leg at knee, flexes thigh at hip
Blood Supply: Femoral artery
Innervation: Femoral nerve (L2-L4)

Rectus Abdominus
Origin: Pubic symphysis and pubic crest
Insertion: Xiphoid process, costal cartilages of ribs 5–7
Action: Flexes vertebral column, compresses abdominal contents
Blood Supply: Superior and inferior epigastric arteries
Innervation: Lower six thoracoabdominal nerves (T7-T11)

Short Head Biceps
Origin: coracoid process of scapula
Insertion: Radial tuberosity, bicipital aponeurosis
Action: Flexes elbow, supinates forearm, adducts shoulder
Blood Supply: Brachial artery
Innervation: Musculocutaneous nerve (C5-C6)

Middle Deltoid
Origin: Acromion process of scapula
Insertion: Deltoid tuberosity of humerus
Action: Shoulder Abduction
Innervation: Anterior and posterior humeral circumflex arteries
Blood Supply: Axillary nerve (C5, C6)

Anterior Tibialis
Origin: Upper 2/3 of the lateral surface of the tibia
Insertion: Medial cuneiform and the base of the first metatarsal
Action: Dorsiflexion and inversion of the foot
Blood Supply: Anterior and Posterior Tibial Arteries
Innervation: anterior tibial nerve

Soleus
Origin: Posterior surface of fibula and tibia
Insertion: Posterior surface of calcaneus via Achilles tendon
Action: Plantarflexion of foot
Blood Supply: Posterior tibial artery
Innervation: Tibial nerve (S1-S2)

Semimembranosis
Origin: Ischial tuberosity
Insertion: Posterior surface of medial tibial condyle
Action: Knee flexion, hip extension
Blood Supply: Femoral and popliteal arteries
Innervation: Sciatic nerve (L5, S1, S2, S3)

Semitendinosis
Origin: Ischial tuberosity
Insertion: Medial surface of tibia
Action: Knee flexion, hip extension
Blood Supply: Femoral and popliteal arteries
Innervation: Sciatic nerve (L5, S1, S2, S3)

Gluteus Minimus
Origin: External surface of the ilium between the anterior and inferior gluteal lines
Insertion: Greater trochanter of the femur
Action: Abduction and Internal Rotation of the Hip
Blood Supply: Superior gluteal artery
Innervation: superior gluteal nerve

Gluteus Medius
Origin: External surface of ilium
Insertion: Greater trochanter of femur
Action: Abducts and medially rotates hip
Blood Supply: Superior gluteal artery
Innervation: Superior gluteal nerve (L5-S1)

Posterior Deltoid
Origin: Spine of scapula
Insertion: Deltoid tuberosity of humerus
Action: Shoulder Extension
Blood Supply: Anterior and posterior humeral circumflex arteries
Innervation: Axillary nerve (C5, C6)

Anterior Deltoid
Origin: Lateral third of clavicle
Insertion: Deltoid tuberosity of humerus
Action: Shoulder Flexion
Blood Supply: Anterior and posterior humeral circumflex arteries
Innervation: Axillary nerve (C5, C6)

Pec Minor
Origin: Anterior surface of the third, fourth, and fifth ribs, near their costal cartilages
Insertion: Coracoid process of scapula
Action: Depression and protraction of scapula
Blood Supply: Pectoral branch of thoracoacromial artery
Innervation: Medial pectoral nerve (C8, T1)

Upper Trapezius
Origin: Superior nuchal line, External occipital protuberance, Nuchal ligament
Insertion: Lateral third of clavicle, Acromion, and Spine of scapula
Action: Elevation and upward rotaiton of the scapula, and Extends and laterally flexes the head and neck
Blood Supply: Transverse cervical artery
Innervation: Accessory nerve (CN XI), C3-C4

Supraspinatus
Origin: Supraspinous fossa of scapula
Insertion: Greater tubercle of humerus
Action: Abducts shoulder
Blood Supply: Suprascapular artery
Innervation: Suprascapular nerve (C5-C6)

Infraspinatus
Origin: Infraspinous fossa of scapula
Insertion: Greater tubercle of humerus
Action: Externally rotates shoulder
Blood Supply: Suprascapular artery
Innervation: Suprascapular nerve (C5-C6)

Long Head Biceps
Origin: supraglenoid tubercle of scapula
Insertion: Radial tuberosity, bicipital aponeurosis
Action: Flexes elbow, supinates forearm, flexes shoulder
Blood Supply: Brachial artery
Innervation: Musculocutaneous nerve (C5-C6)

Latissimus Dorsi
Origin: Spinous processes of T7-T12, thoracolumbar fascia, iliac crest, ribs 9-12
Insertion: Intertubercular groove of humerus
Action: Extension, adduction, medial rotation of arm
Blood Supply: Thoracodorsal artery
Innervation: Thoracodorsal nerve (C6-C8)

Lateral Head Gastrocnemius
Origin: Lateral condyle of femur
Insertion: Posterior surface of calcaneus via Achilles tendon
Action: Plantarflexion of foot, flexion of knee
Blood Supply: Sural branches of popliteal artery, posterior tibial artery
Innervation: Tibial nerve (S1-S2)

Medial Head Gastrocnemius
Origin: Medial condyle of femur
Insertion: Posterior surface of calcaneus via Achilles tendon
Action: Plantarflexion of foot, flexion of knee
Blood Supply: Sural branches of popliteal artery, posterior tibial artery
Innervation: Tibial nerve (S1-S2)

Biceps Femoris
Origin: long head: ischial tuberosity; short head: lateral lip of the linea aspera
Insertion: head of fibula and lateral condyle of the tibia
Action: extends the hip, flexes the knee
Blood Supply: perforating branches of the deep femoral artery
Innervation: long head: tibial nerve; short head: common fibular (peroneal) nerve

Brachioradialis
Origin: Upper two-thirds of the lateral supracondylar ridge of the humerus
Insertion: Lateral side of the base of the styloid process of the radius
Action: flexes the elbow, assists in pronation & supination
Blood Supply: Radial recurrent artery
Innervation: radial nerve

Extensor Carpi Radialis Longus
Origin: Lateral supracondylar ridge of humerus
Insertion: Base of second metacarpal
Action: Wrist extension, radial deviation
Blood Supply: Radial recurrent artery
Innervation: Radial nerve (C6-C7)

Extensor Carpi Radialis Brevis
Origin: Lateral epicondyle of humerus
Insertion: Base of 3rd metacarpal
Action: Extends and abducts wrist
Blood Supply: Radial artery
Innervation: Radial nerve (C7-C8)

Extensor Digitorum
Origin: Lateral epicondyle of humerus
Insertion: Extensor expansions of digits 2-5
Action: Extends fingers and wrist
Blood Supply: Posterior interosseous artery
Innervation: Posterior interosseous nerve (C7-C8)

Extensor Digiti Minimi
Origin: Common extensor tendon (lateral epicondyle of the humerus)
Insertion: joins the extensor digitorum tendon to the 5th digit and inserts into the extensor expansion
Action: extends the metacarpophalangeal, proximal interphalangeal and distal interphalangeal joints of the 5th digit
Blood Supply: interosseous recurrent artery
Innervation: Deep radial nerve

Extensor Carpi Ulnaris
Origin: Humoral head: originates from the common extensor tendon; Ulnar head originates from the common aponeurosis
Insertion: Humoral Head: lateral epicondyle of the humerus; Ulnar Head posterior border of the ulna
Action: Wrist extension and ulnar deviation
Blood Supply: posterior interesses artery
Innervation: posterior interosseous nerve

Levator Scapulae
Origin: Transverse processes of C1-C4
Insertion: Medial border of scapula
Action: Elevates scapula
Blood Supply: Dorsal scapular artery
Innervation: Dorsal scapular nerve (C3-C4)

Rhomboid Minor
Origin: Spinous processes of C7 and T1 vertebrae
Insertion: Medial border of scapula, above spine
Action: Retraction and elevation of scapula
Blood Supply: Dorsal scapular artery
Innervation: Dorsal scapular nerve (C4-C5)

Rhomboid Major
Origin: Spinous processes of T2-T5
Insertion: Medial border of scapula
Action: Retracts scapula
Blood Supply: Dorsal scapular artery
Innervation: Dorsal scapular nerve (C4-C5)

Serratus Posterior Inferior
Origin: Spinous processes of T11-L2
Insertion: Lower borders of ribs 9-12
Action: Depresses ribs 9-12
Blood Supply: Posterior intercostal arteries
Innervation: Intercostal nerves (T9-T12)

Plantaris
Origin: above the lateral femoral condyle (above the lateral head of gastrocnemius)
Insertion: dorsum of the calcaneus medial to the calcaneal tendon
Action: flexes the knee; plantar flexes the foot
Blood Supply: popliteal artery
Innervation: tibial nerve

Peroneus Brevis
Origin: Lower two-thirds of lateral surface of fibula
Insertion: Base of fifth metatarsal
Action: Plantarflexion and eversion of foot
Blood Supply: Peroneal artery
Innervation: Superficial peroneal nerve (L5, S1)

Peroneus Longus
Origin: Head and upper two-thirds of lateral surface of fibula
Insertion: Medial cuneiform and base of first metatarsal
Action: Plantarflexion, eversion of foot
Blood Supply: Peroneal artery
Innervation: Superficial peroneal nerve (L5, S1)

Pronator Teres
Origin: Medial epicondyle of humerus and coronoid process of ulna
Insertion: Middle lateral surface of radius
Action: Pronates forearm
Blood Supply: Ulnar artery
Innervation: Median nerve (C6-C7)

Flexor Carpi Radialis
Origin: Medial epicondyle of humerus
Insertion: Base of 2nd and 3rd metacarpals
Action: Flexes and abducts hand at wrist
Blood Supply: Radial artery
Innervation: Median nerve (C6-C7)

Flexor Digitorum Profundus
Origin: Posterior border of the ulna, proximal two-thirds of medial border of ulna, interosseous membrane
Insertion: Base of the distal phalanx of digits 2-5
Action: Flexes the metacarpophalangeal, proximal interphalangeal and distal interphalangeal joints
Blood Supply: ulnar artery, anterior interosseous artery
Innervation: median nerve (radial one-half); ulnar nerve (ulnar one-half)

Flexor Carpi Ulnaris
Origin: common flexor tendon & (ulnar head) from medial border of olecranon & upper 2/3 of the posterior border of the ulna
Insertion: pisiform, hook of hamate, and base of 5th metacarpal
Action: flexes wrist, adducts hand
Blood Supply: ulnar artery
Innervation: ulnar nerve

Flexor Digitorum Superficialis
Origin: Medial epicondyle of humerus, coronoid process, anterior radius
Insertion: Middle phalanges of digits 2-5
Action: Flexes wrist and middle phalanges
Blood Supply: Ulnar artery
Innervation: Median nerve (C7-T1)