Musculature origins Flashcards by Aydin Wiebe

Sternocleidomastoid origin

Manubrium of sternum (sternal head)

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Trapezius origin

occipital bone, spinous process of T spine, ligamentum nuchae

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Latissimus dorsi origin

spinous processes of inferior T spine, and lumbar/sacral vertebrae and thoracolumbar fascia

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Rhomboid Major origin

Spinous processes of T2 - T5

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Rhomboid Minor origin

spinous processes of C7 and T1

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Levator Scapulae origin

Transverse process of first 4 cervical vertebrae

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External oblique origin

Ribs (5-12)

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Internal oblique origin

iliac crest

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Rectus abdominis origin

Superior surface around pubic symphysis (pubic crest)

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pectoralis minor origin

anterior surfaces and superior margins of ribs 3-5

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pectoralis major origin

cartilage of ribs 2-6, body of sternum, inferior medial portion of clavicle

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Serratus Anterior origin

anterior and superior margins of ribs 1-8, 1-9, or 1-10

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Subclavius origin

First rib

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Coracobrachialis origin

Coracoid process

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Deltoid origin

Clavicle and scapula (acromion and adjacent scapular spine)

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Supraspinatus origin

Supraspinous fossa of scapula

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Infraspinatus origin

Infraspinous fossa of scapula

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Subscapularis origin

Subscapular fossa of scapula

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Teres Major origin

inferior angle of scapula

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Teres Minor origin

Lateral border of scapula

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Biceps Brachii short head origin

Coracoid process

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Biceps Brachii long head origin

Supraglenoid tubercle

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Brachialis origin

(Humerus) Distal half of anterior surface of humerus

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Brachioradialis origin

(Humerus) lateral supracondylar ridge of humerus

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Triceps brachii long head origin

(scapula) Infraglenoid tubercle of scapula

Triceps Brachii lateral head origin

superior lateral margin of humerus

Anconeus origin

Lateral epicondyle of humerus

Coracobrachialis origin

Coracoid process of scapula

Flexor carpi radialis origin

medial epicondyle of humerus

Flexor carpi ulnaris origin

medial epicondyle of humerus

Palmaris longus origin

medial epicondyle of humerus

Extensor carpi radialis longus origin

lateral supracondylar ridge of humerus

Extensor carpi radialis brevis origin

lateral epicondyle of humerus

extensor carpi ulnaris origin

lateral epicondyle of humerus, dorsal surface of ulna

Pronator Teres origin

medial epicondyle of humerus

Pronator Quadratus origin

anterior and medial surface of distal ulna

Supinator origin

lateral epicondyle of humerus

Gluteus Maximus origin

iliac crest

Gluteus medius origin

anterior iliac crest between posterior and anterior gluteal lines

Gluteus minimus origin

lateral surface of illium between inferior and anterior gluteal lines

Tensor Fasciae latae origin

iliac crest

Obturators (externus and internus) origins

lateral and medial margins of obturator foramen

piriformis origin

anterolateral surface of sacrum

Gemelli (Superior and Inferior) origin

ischial spine (sup) ischial tuberosity (inf)

Quadratus Femoris origin

Ischial tuberosity

iliacus origin

iliac fossa

Psoas major origin

transverse processes of vertebrae (T-12 - L5)

Adductor brevis origin

inferior pubic ramus

Adductor longus origin

inferior pubic ramus

Adductor magnus origin

inferior pubic ramus

Pectineus origin

superior ramus of pubis

Gracilis origin

inferior pubic ramus

Rectus Femoris origin

anterior inferior iliac spine

Vastus intermedius origin

Anterolateral surface of femurs and linea aspera (distal half)

Vastus lateralis origin

Anterior and inferior to greater trochanter of femur and along lines aspersions (proximal half)

Vastus Medialis origin

Entire length of Linea aspera of femur

Biceps femoris origin

ischial tuberosity (long head) linea aspera (short head)

Semimembranosus origin

ischial tuberosity

Semitendinosus origin

ischial tuberosity

Sartorius origin

Anterior superior iliac spine

Popliteus origin

Lateral condyle of femur

Gastrocnemius origin

femoral condyles

Soleus origin

head and proximal shaft of fibula, postmedial shaft or tibia

Plantaris origin

Lateral supracondylar ridge

Tibialis posterior origin

Interosseous membrane

Fibularis longus origin

head of fibula

Fibularis Brevis origin

midlateral margin of fibula

Flexor Digitorum longus origin

postmedial surface of tibia

Flexor Hallucis longus origin

Posterior surface of fibula

Tibialis anterior origin

lateral condyle and proximal shaft of tibia

Extensor digitorum longus origin

lateral condyle of tibia, anterior surface of fibula

Extensor Hallucis longus origin

anterior surface of fibula