Upper Extremity Anatomy Flashcards
Supraspinatus
O: Supraspinous Fossa of Scapula Ins: Greater Tubercle of Humerus Inn: Suprascapular Nerve (C5-6)
Infraspinatus
O: Infraspinous Process of Scapula Ins: Greater Tubercle of Humerus Inn: Suprascapular Nerve (C5-6)
Teres Minor
O: Lateral Upper 2/3 of Scapula Ins: Greater Tubercle of Humerus Inn: Axillary Nerve
Subscapularis
O: Subscapular Fossa of Scapula Ins: Lesser Tubercle of Humerus Inn: Subscapular Nerve (C5-6)
Teres Major
O: Lower 1/3 of Lateral Scapula Ins: Lesser Tubercle of the Humerus Inn: Subscapular Nerve (C5-6)
Biceps Brachii Long Head
O: Supraglenoid tubercle of the scapula Ins: Radial Tuberosity Inn: Musculocutaneous Nerve (C5, 6, 7)
Biceps Brachii Short Head
O: Coracoid Process of the Scapula Ins: Radial Tuberosity Inn: Musculocutaneous Nerve (C5, 6, 7)
Triceps (Long Head)
O: Infraglenoid Tubercle of Scapula Ins: Olecranon Process of Ulna via triceps tendon Inn: Radial Nerve (C6-8)
Pronator Teres
O: Medial Epicondyle of Humerus/Common Flexor Tendon/Coronoid Process of Ulna Ins: Lateral radius, distal to supinator insertion Inn: Median Nerve (C6-7)
Supinator
O: Lateral Epicondyle of Humerus, radial collateral ligament, and annular ligament of the radius Ins: Lateral 1/3 of proximal radius Inn: Deep Branch of Radial Nerve (C6-7)
Flexor Digitorum Superficialis
O: Humeroulnar Head, Medial Epicondyle of Humerus, Radial Head, Middle 1/3 of Radius. Ins: Shafts of Middle Phalanges 2-5 Inn: Median Nerve (C8-T1)
Flexor Digitorum Profundus
O: Posterior and medial borders of ulna Ins: Base and palmar surface of distal phalanges of digits 2-5 Inn: Median Nerve and Ulnar Nerve (C8-T1)
Flexor Pollicis Longus
O: Interosseous Membrane and anterior surface of radius Ins: Palmar side of distal phalanx of first digit Inn: Anterior Interosseous Nerve, branch of Median Nerve (C8-T1)
Extensor Carpi Radialis Longus and Brevis
O: humerus at the anterior of lateral epicondyle (common extensor tendon) I: Posterior base of the 3rd metacarpal Nerve: deep branch of the radial nerve
Flexor Pollicis Brevis (Superficial and Deep)
O: Superficial- Flexor Retinaculum Deep- Capitate and Trapezium Bones Ins: Base of Proximal Phalanx of the 1st digit Inn: Recurrent Branch of Median Nerve
Adductor Pollicis
O: Capitate, 2nd and 3rd metacarpals (oblique), 3rd metacarpal (transverse) Ins: Proximal phalanx (oblique and transverse) Inn: Ulnar (C8-T1)
Abductor Pollicis Brevis
O: Navicular and trapezium Ins: Base of proximal phalanx Inn: Median (SO IS THE Flexor Pollicis and Opponens Pollicis)
Ape Hand forms due to Median Nerve Palsy
Extensor Pollicis Longus
Posterior surface of ulna; interosseous membrane; I: Distal phalanx I Inn:Posterior interosseous nerve
Lumbricals
O: Tendons of flexor digitorum profundus Ins: Radial side of extensor expansion of extensor digitorum Inn: Lateral two, median; medial two, ulnar
Dorsal/Palmar Interossei
O: Dorsal- The medial side of the proximal end of the 1-4 metacarpal and lateral side of the 2-5 metacarpal…Palmar- medial surface of the base of the metacarpal Ins: Dorsal- Lateral side of the base of the 2-5…Palmar- proximal phalanx and the extensor expansion Inn: deep branch of the ulnar nerve (C8, T1)
Serratus Anterior
O: Ribs 1-8 Ins: Ventral surfaces of the superior and inferior angles and vertebral (medial) border of scapula Inn: Long Thoracic Nerve
Levator Scapulae
O: Transverse Processes of C1-4 Ins: Superior angle of medial border of scapula Inn: 3rd and 4th cervical spinal nerves
Rhomboids
O: Spinous process of C7-T5 Ins: Medial Border of Scapula Inn: Dorsal Scapular
Low Trap
O: Spinous Process of T5-12 Ins: Spinous Process of Scapula Inn: CN 11, Spinal Accessory Nerve
Mid Trap
O: Spinous Process of Vertebrae T1-4 Ins: Acromion of Scapula Inn: CN 11, Spinal Accessory Nerve
Upper Trap
O: Superior Nuchal Line; external occipital protuberance Ins: Lateral 1/3 of Clavicle Inn: CN 11, Spinal Accessory Nerve
Pec Major
O: Clavicular head – anterior surface of the medial half of clavicle. Sternocostal head – is the larger of the two heads… The anterior surface of the manubrium and body of sternum, The anterior surface of the superior six costal cartilages. Superior part of the aponeurosis of external oblique muscle. Ins: Crest of greater tubercle (Lateral lip of bicipital groove) Inn: Upper- Lateral pectoral nerve, C5-7 Lower- Lateral and medial pectoral nerve, C6-T1
Pec Minor
O: Anterior Ribs 3-5 Ins: Coracoid Process of Scapula Inn: Medial Pectoral Nerve (C8-T1)
Latissmus Dorsi
O: Spinous processes of T7-L5 b. Iliac crest of sacrum. c. Thoracolumbar fascia. d. Inferior angle of the scapula. e. Lower Ribs 3-4 Ins: Intertubercular Groove of Humerus Inn: Thoracodorsal (C6-8)
Sternocleidomastoid
O: a medial rounded and tendinous sternal head (SH) a lateral fleshy clavicular head (CH). Ins: Lateral surface of the mastoid process through a strong tendon, and to the lateral half of superior nucheal line through an aponeurosis. Inn: Spinal Accessory Nerve 11
Deep Neck Flexors
O: Ins: Inn:
External Intercostals
O: inferior border of rib above Ins: superior border of rib below Inn: Respective Intercostal Nerve *Goes diagonal towards stomach
Internal Intercostals
O: from the costal groove (lower part of inner surface of rib near the inferior border) of the rib above Ins: Upper border of rib below Inn: Respective Intercostal Nerve *Goes diagonal towards back
