UE Muscles Origin Insertion Action Innervation PDF

MUSCLES OF THE UE (MOORE, DALLEY, & AGUR 7TH ED) MUSCLE & AXN SUPERIOR/ INFERIOR/DISTAL INNERVATION PROXIMAL Sternocleidomastoid: Mastoid process of temporal bone; Sternal head...

MUSCLES OF THE UE (MOORE, DALLEY, & AGUR 7TH ED) MUSCLE & AXN SUPERIOR/ INFERIOR/DISTAL INNERVATION PROXIMAL Sternocleidomastoid: Mastoid process of temporal bone; Sternal head: ant surface CN XI (motor), ventral Ipsilateral sidebending of head lateral half of sup nuchal line Manubrium of sternum Clavicular rami C2, C3 (sensory) with rotation to opposite; head: sup surface of medial 1/3 Bilat-neck flexion clavicle Posterior fibers bilat-extension at O-A joint Levator scapulae: Post tubercle of transverse Superior aspect of medial border of Dorsal Scapular n C5, Elevates scapula; downward rot processes, CV1-CV4 scapula C3-C4 ventral rami scapula Upper trapezius: upwardly Medial 1/3 superior nuchal line; Lateral 1/3 clavicle CN XI (motor), ventral rotate w/ lower trapezius, Occipital protuberance to CV7, Rami C3-4 (sensory) elevate & retract scapula ligamentum nuchae Middle trapezius: retract CV7 to TV4 spinous process Acromion & crest of spine of scapula See above scapula Lower trapezius: upwardly TV4 to TV12 spinous process Spine of scapula See above rotate w/ Upper trapezius, depress, retract scapula Serratus anterior: protract Ext lateral surface of ribs 1-8 Anterior surface of medial border of Long Thoracic N. scapula & holds it against scapula C5, C6,C7 thoracic wall; upward rotation scapula Pectoralis major: Clavicular head: anterior surface of Lateral lip of intertubercular groove Lateral & Medial Add & IR humerus medial ½ of clavicle of humerus Pectoral nn. Clavicular head alone: flexes Sternocostal head; ant surface of Clavicular: C5-C6 1  MUSCLES OF THE UE (MOORE, DALLEY, & AGUR 7TH ED) MUSCLE & AXN SUPERIOR/ INFERIOR/DISTAL INNERVATION PROXIMAL humerus sternum, upper 6 costal cartilages, SC: C7, C8-T1 SC head alone: ext humerus & aponeurosis of Ext Oblique ms. from overhead position; horizontal add at g/h joint Pectoralis minor: 3rd to 5th ribs near costal cartilages Medial border & superior surface of Medial & lateral pectoral n. Stabilizes scapula by drawing it coracoid process of scapula C6, C7, C8 inferiorly and anteriorly against thoracic wall Anterior deltoid: Lateral 1/3 of the clavicle, anterior Deltoid tuberosity of the humerus Axillary N. C5,C6 Abd, flex, IR humerus surface Middle deltoid : abd humerus Lateral aspect of acromion Deltoid tuberosity See above Posterior deltoid: ext, ER, abd Inf lip of crest of spine of scapula Deltoid tuberosity See above humerus Supraspinatus: Initiates & assists Supraspinous fossa (medial 2/3) of Superior facet on Greater tubercle Suprascapular N. C4, C5, C6 deltoid in abd of humerus; holds scapula of humerus head in glenoid cavity (rotator cuff) Infraspinatus: ER humerus; hold Infraspinous fossa of scapula Middle facet Greater tubercle of Suprascapular n. C5, C6 humeral head in glenoid humerus (rotator cuff) Teres Minor: ER humerus; hold Middle part of lateral border of Inferior facet on greater tubercle of Axillary N. C5-C6 humeral head in glenoid scapula humerus (rotator cuff) Subscapularis: Subscapular fossa Lesser tubercle of humerus Upper & Lower IR & add humerus; hold head of Subscapular nn. 2  MUSCLES OF THE UE (MOORE, DALLEY, & AGUR 7TH ED) MUSCLE & AXN SUPERIOR/ INFERIOR/DISTAL INNERVATION PROXIMAL humerus in place C5, C6, C7 (rotator cuff) Teres major: Dorsal surface of inferior angle of Medial lip of intertubercular groove Lower subscapular n. Ext, add, IR humerus scapula C5, C6 Rhomboids Major: Spinous processes TV2-TV5 Medial border of scapula from spine Dorsal scapular N. C4-C5 Retract scapula; Elevate to inferior angle scapula; downward rotation scapula; Fix scapula against thoracic wall Rhomboid Minor: Nuchal ligament & spinous Medial border of scapula at the level Dorsal Scapular N. C4-C5 Retract scapula; Elevate processes of CV7 & TV1 of the spine scapula; downward rotation scapula; Fix scapula against thoracic wall Latissimus dorsi: Ext, add, IR Thoracolumbar fascia, Floor of intertubercular groove of Thoracodorsal N. C6, C7, humerus Spinous processes TV6 to humerus C8 TV12, inferior 3 or 4 ribs, iliac crest Coracobrachialis: flexion w/ add Tip or apex of coracoid process of Middle 1/3, medial humerus Musculocutaneous n. of humerus scapula C5, C6, C7 Biceps brachii: Short head: Coracoid process of Radial tuberosity & fascia of forearm Musculocutaneous n. Long-weak shoulder flexion; scapula via bicipital aponeurosis C5-C6 weak abd if humerus ER Long head: supraglenoid tubercle of 3  MUSCLES OF THE UE (MOORE, DALLEY, & AGUR 7TH ED) MUSCLE & AXN SUPERIOR/ INFERIOR/DISTAL INNERVATION PROXIMAL Both: elbow flexion with scapula forearm supination Brachialis: Distal half humerus, anterior Ulnar tuberosity & ant aspect Musculocutaneous n. Elbow flexion regardless of surface coronoid process of ulna C5-C6 position Brachioradialis: Proximal 2/3 of lateral Lateral surface of distal end of radius Radial n. Elbow flexion (midpronation supracondylar ridge of humerus C5, C6, C7 most effective) Triceps: all heads: elbow Long head: Infraglenoid tubercle of Proximal end of Olecranon process Radial n. C6, C7, C8 extension scapula of the ulna & fascia of forearm Lat head: post surface humerus, Long head: steadies head of sup to radial groove abducted humerus Medial head: post surface humerus, inf to radial grove Pronator teres: pronates (humeral head) Medial epicondyle Middle of lateral surface of radius Median n. C6-C7 forearm; flexes elbow of the humerus; (ulnar head) coronoid process of the ulna Pronator quadratus: pronates Distal ¼ of ant surface of ulna Distal ¼ ant surface of radius Ant interosseous n (from forearm median n.)C8-T1 Supinator: supinates forearm Lateral epicondyle humerus, radial Proximal radius, anterior , lateral, Deep Branch radial n. C7, collateral & annular ligaments, posterior surfaces C8 supinator fossa & crest of ulna Extensor carpi radialis longus : Lateral supracondlyar ridge of Base of 2nd metacarpal bone Radial n. C6,C7 ext & abd hand at wrist joint humerus 4  MUSCLES OF THE UE (MOORE, DALLEY, & AGUR 7TH ED) MUSCLE & AXN SUPERIOR/ INFERIOR/DISTAL INNERVATION PROXIMAL Ext carpi radial brevis: ext & abd Lateral epicondyle of humerus Base of 3rd metacarpal Deep branch of radial n. hand at wrist joint C7-C8 Extensor digitorum: Ext medial 4 Lateral epicondyle humerus Base of middle phalanges of fingers Post interosseous n. C7-C8 digits at MCP joint: assist with IP of medial 4 digits via extensor (continuation of the deep ext; ext hand at wrist jt expansion br of radial n.) Extensor Digiti Minimi: Ext 5th Lateral epicondyle of humerus Extensor expansion of 5th digit Post interosseous n. C7-C8 digit at MCP & IP joints (continuation of the deep br of radial n.) Extensor carpi ulnaris: Ext & add Lateral epicondyle humerus & post Base of 5th metacarpal Post interosseous n. C7-C8 hand at wrist border of ulna (continuation of the deep br of radial n.) Abductor Pollicis Longus: Abd Post surface of proximal halves of Base of 1st metacarpal Post interosseous n. C7-C8 thumb & extends it at CMC jt ulna, radius, & interosseous (continuation of the deep membrane br of radial n.) Extensor Pollicis Brevis: Ext prox Posterior surface of radius & Dorsal aspect Base of proximal Post interosseous n. C7-C8 phalanx of thumb at MCP; ext at interosseous membrane phalanx of thumb (continuation of the deep CMC br of radial n.) Extensor Pollicis Longus: Ext Posterior surface of middle 1/3 of Base of distal phalanx of thumb Post interosseous n. C7-C8 distal phalanx of thumb at IP; ulna & interosseous membrane (continuation of the deep ext MCP & CMC jts br of radial n.) Extensor Indicis: ext 2nd digit; Posterior Surface of distal 1/3 of Extensor expansion of 2nd digit Post interosseous n. C7-C8 assists w/ wrist ext ulna & interosseous membrane (continuation of the deep br of radial n.) Flexor carpi radialis: Flexes and Medial epicondyle of the humerus Base of 2nd metacarpal Median n. C6-C7 5 abducts of hand at the wrist Flexor carpi ulnaris: flexes & Humeral head: medial epicondyle Pisiform, hook of hamate and base Ulnar n. C7-C8 adducts hand at the wrist of humerus of 5th metacarpal Ulnar head: olecranon & post border of ulna Palmaris Longus: assist wrist Medial epicondyle from the Distal ½ of the flexor retinaculum Median N. (C7,8) flexion; tense palmar common flexor origin and palmar aponeurosis aponeurosis Flexor digitorum superficialis: Humeroulnar head: medial Bodies of middle phalanges of Median N. C7-T1 flexes PIP joints of medial four epicondyle of humerus, ulnar medial 4 digits digits: also flexes MCP joints; collateral ligament, coronoid assist wrist flexion process of ulna; Radial head: sup ½ of ant border of radius Flexor digitorum profundus: DIP Proximal ¾ of medial & ant surface Bases of distal phalanges of medial 4 Anterior Interosseus N flexion of medial four digits; of ulna & interosseous membrane digits (from median n.). C8-T1 to also flexes PIP & MCP; assist lateral 2 FDP wrist flexion Ulnar n. C8-T1 to medial 2 FDP Flexor Pollicis Longus: flexes IP, Ant surface of radius & adj Base of distal phalanx thumb Ant interosseous n. (from MCP, CMC of thumb interosseous membrane median n.) C8-T1 Intrinsics of the Hand Abd Poll Brevis: abd thumb; Flexor retinaculum & tubercles of Lat side of base of proximal phalanx Recurrent br. Median N. assist thumb opposition scaphoid & trapezium of thumb (C8, T1) & extensor expansion Flexor Poll Brevis (2 heads): flex Flexor retinaculum & tubercles of Lat side of base of proximal phalanx Superficial head: Recurrent thumb scaphoid & trapezium of thumb br. Median N. (C8, T1) Deep head: Deep br. Ulnar 6  n. (C8, T1) st Opponens Pollicis: oppose Flexor retinaculum & tubercles of Lateral aspect 1 MC Recurrent br. Median n. thumb scaphoid & trapezium (C8, T1) Adductor Pollicis (2 heads): Oblique: base of 2nd & 3rd MC, Medial side of base of proximal Deep br. Ulnar N. (C8, T1) Adducts thumb capitate and adj carpals phalanx of thumb Transverse: ant surface of shaft of 3rd MC Abd digiti minimi: abduct 5th Pisiform Medial side base of proximal Deep br Ulnar N. (C8, T1) digit; assist flex of 5th prox phalanx of 5th digit phalanx Flexor digit mini(brevis): flexes Hook of the hamate & flexor Medial side base of proximal Deep br Ulnar N. (C8, T1) prox phalanx of 5th digit retinaculum phalanx of 5th digit Opponens Digiti (minimi): Draws Hook of the hamate & flexor Medial border of 5th MC Deep br Ulnar N. (C8, T1) 5th MC anteriorly to oppose the retinaculum thumb Lumbricals 1 & 2: flex MC jts and Lateral 2 tendons of FDP Lateral sides of extensor expansion Median nerve (C8, T1) extend IP joints of digits 2-5 Lumbricals 3 & 4: flex MC jts and Bipennate from medial 3 tendons Deep br of ulnar N. (C8, T1) extend IP joints of FDP Palmar Interossei: adduct 2nd, Palmar surfaces of 2nd, 4th, & 5th Base of proximal phalanges & ext Deep br. Of Ulnar nerve 4th, and 5th digit toward MC expansion of 2nd, 4th, and 5th digits (C8, T1) midline: assist with MCP flexion; IP extension Dorsal Interossei: abduct digits Bipennate adjacent sides of Base of proximal phalanges & ext Deep br. Of Ulnar nerve 2-4 away from midline; assist Metacarpals expansions of 2nd, 4th, & 5th digits (C8, T1) with MCP flexion; IP extension 7