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44 Cards in this Set
- Front
- Back
Origin: external occipital protuberance, ligamentum nuchae, spinous processes of C7-T12
Insertion: spine of scapula, acromion, lateral 1/3 of clavicle Action: retract/adduct scapula;upward rotation of scapula(elevate lateral angle);upper fibers: elevate shldr & rotate scapula up, sidebend neck ipsilaterally middle fibers: retract scapula lower fibers: depressshoulder & superiorly rotate scapula |
Trapezius
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Origin: spinous process of C7&T1
Insertion: base of spine of scapula Action: elevate scapula, may tilt neck to same side |
Rhomboid Minor
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Origin: spine of T2-5
Insertion: medial border of scapula between spine andinferior angle
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Rhomboid Major
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Origin: transverse processes of C1-C4
Insertion: medial border of scapula between superior angleand base of spine Action: elevate scapula, may tilt neck to same side |
Levator Scapulae
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Origin: anterolateral surface of ribs 1-8
Insertion: costal (anterior) surface of medial border of scapula (mostly at the inferior angle |
Serratus Anterior
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Origin: ventral aspect of ribs 3-5
Insertion: coracoid process of scapula Action: depresses & protracts (stabilizes) shoulder |
Pectoralis Minor
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Origin: supraspinous fossa of scapula
Insertion: superior facet of greater tubercle of humerus Action: abduct arm; fixes head of humerus in glenoid |
Supraspinatus
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Origin: infraspinous fossa of scapula
Insertion: middle facet of greater tubercle of humerus Action: externally rotate arm; assist stabilization of head ofhumerus |
Infraspinatus
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Origin: lateral 1/3 of clavicle, acromion, and spine ofscapula
Insertion: lateral surface of middle humerus (deltoid tuberosity) Action: anterior fibers: flex &internally rotate arm middle fibers: abduct arm posterior fibers: extend & externally rotate arm |
Deltoid
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Origin: upper 2/3 of posterior surface of lateral border of scapula
Insertion: lowest facet of greater tubercle of humerus Action: external rotation of arm; assist adduction |
Teres Minor
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Origin: posterior surface of inferior angle of scapula
Insertion: medial lip of bicipital groove (crest of lesser tubercle) Action: extend (including hyperextension), adduct, internally rotate arm |
Teres Major
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Origin: subscapular fossa
Insertion: lesser tubercle of humerus Action: internal rotation of arm, stabilization of glenohumeral joint |
Subscapularis
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Origin: medial 2/3 of clavicle, anterior manubrium and body of sternum, costal cartilages of ribs 1-6, aponeurosis of external oblique
Insertion: lateral lip of bicipital groove (intertubercular crest of the greater tubercle) Action: adduction, horiz adduction, IR of arm; assist arm flexion; assist arm extension from fullflexion; depress & inferiorly rotate scapula/shoulder |
Pectoralis Major
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Origin: spinous process T7-12,spinous process of lumbar and sacral vertetebrae via lumbodorsal fascia, iliac crest, and lower 4 ribs
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Latissimus Dorsi
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Origin: tip of coracoid process of scapula
Insertion: middle third of medial shaft of humerus Action: flex & adduct arm; helps stabilize glenohumeral joint |
Coracobrachialis
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Origin: long head: infraglenoid tubercule lateral head: posterior surface of humerus, superior to radial groove medial head: posterior surface of humerus,inferior to radial groove
Insertion: olecranon process of ulna Action: extend forearm; long head aids in extensionand adduction of arm |
Triceps Brachii
(lateral head, long head, medial head) |
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Origin: distal half of anteriour surface of humerus, and intermuscular septum
Insertion: coronoid process andulnar tuberosity Action: flex forearm |
Brachialis
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Origin: lateral supracondylar ridge
Insertion: lateral side of distal radius Action: flex at elbow; assist pronation and supination to neutral from extremes of these positions (ie, from extreme pronation it assists in supination to neutral) |
Brachioradialis
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Origin: humeral head: medial supracondylar ridge ulnar head: coronoid proc.
Insertion: middle of lateral surface of radius Action: pronate forearm; assist forearm flexion |
Pronator Teres
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Origin: medial epicondyle humerus
Insertion: base of 2nd and 3rd metacarpals bones Action: flex wrist; radial deviationof hand; assist pronation |
Flexor Carpi Radialis
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Origin: humeral head: medial epicondyle ulnar head: olecranon and adjacent ulnar shaf
Insertion: pisiform, hamate, 5th metacarpal Action: flex wrist; ulnar deviation of hand |
Flexor Carpi Ulnaris
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Origin: lateral epicondyle of humerus and midshaft of posterior ulna
Insertion: base of 5th metacarpal Action: extend and ulnarly deviate hand (at wrist) |
Extensor Carpi Ulnaris
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Origin: lateral epicondyle of humerus
Insertion: base of 3rd metacarpal Action: extension at wrist; radially deviate hand |
Extensor Carpi Radialis Brevis
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Origin: lateral supracondylar ridge of humerus
Insertion: base of 2nd metacarpal Action: extension at wrist; radially deviate hand; weaksupinator |
Extensor Carpi Radialis Longus
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Origin: lateral epicondyle of humerus, lateral and annular ligaments,supinator crest of ulna
Insertion: lateral and anterioursurface of proximal 1/3 of radius Action: supinates forearm |
Supinator
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Origin: short head: tip of coracoid process of scapula
long head: Supraglenoidtubercule |
Biceps Brachii
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Origin: medial epicondyle of humerus
Insertion: palmar aponeurosis Action: flexion at wrist |
Palmaris Longus
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Origin: lateral epicondyle ofhumerus
Insertion: extensor expansion* of digits 2-5 (thus to dorsum of proximal, middle, and distal phalanges) Action: extend at MCP** and IP joints; assist extension atwrist |
Extensor Digitorum
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Origin: posterior aspect of lateral epicondyle of humerus Insertion: lateral surface of olecranon and superior part of posterior surface of ulna Action: assists triceps in forearm extension; supports lateral side of elbow joint when contracting |
Anconeus |
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Origin: lateral epicondyle of humerus Insertion: extensor expansion of little finger Action: extension at MCP and IP joints of little finger |
Extensor Digiti Minimi |
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Origin: posterior surfaces of middle 1/3 of radius, ulna and interosseous membrane Insertion: “lateral” side of base of1st metacarpal Action: abduct thumb at CMC joint;radially deviate and flex hand (at wrist) |
Abductor Pollicis Longus |
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Origin: posterior surface of distal radius, interosseous membrane Insertion: dorsum of base of proximal phalanx of thumb Action: extend thumb at MCPjoint; assist extension at CMC joint ; assist radial deviation of hand |
Extensor Pollicis Brevis |
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Origin: middle 1/3 of posterior shaft of ulna and interosseous membrane (just distal to APL) Insertion: dorsum of base of distalphalanx of thumb Action: extend IP and MCP jointsof thumb; assist radialdeviation of hand |
Extensor Pollicis Longus |
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Origin: distal shaft of ulna, interosseus membrane Insertion: joins extensor digitorum to index finger Action: extend index finger at IP &MCP joints; assist adduction of index finger atMCP joint |
Extensor Indicus |
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Origin: flexor retinaculum, scaphoid & trapezium Insertion: radial side of proximal phalanx of thumb Action: abduct thumb at CMC joint, assist flexion at MCP joint, assist extension at IP joint |
Abductor Pollicis Brevis |
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Origin: flexor retinalculum and trapezium Insertion: base of palmar surface of proximal phalanx of thumb Action: flex MCP joint, assist opposition and adduction of thumb |
Flexor Pollicis Brevis |
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Origin: flexor retinaculum and trapezium Insertion: length of radial side of palmer surface of 1st metacarpa Action: opposition of thumb (draws1st metacarpal across palm, rotating it palmarly at the same time) |
Opponens Pollicis |
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Origin: transverse head: palmer surface of body of 3rd metacarpal oblique head: palmar surface of bases of 2nd and 3rd metacarpals, capitate, trapezoid and trapezium Insertion: ulnar side of palmar surfaceof base of proximal phalanx of thumb Action: adduct thumb at CMC joint, assist flexion at CMC joint, assist in opposition |
Adductor Pollicis |
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Origin: pisiform bone, also often the tendon of flexor carpi ulnaris Insertion: ulnar surface of base of proximal phalanx of little finger Action: abduct little finger at MCPjoint; assist flexion at MCPjoint |
Abductor Digiti Minimi |
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Origin: hook of hamate and flexor retinaculum Insertion: ulnarly and slightly palmarly on proximal phalanx of little finger Action: flex proximal phalanx of little finger at |
Flexor Digiti Minimi Brevis |
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Origin: hook of hamate and flexor retinaculum Insertion: ulnar border of shaft of 5th metacarpal Action: draws little finger & 5th metacarpal anteriorly (out of palm) and rotates it palmarly; bringing it into opposition with thumb and deepening hollow of hand |
Opponens Digiti Minimi |
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Origin: 1st & 2nd: radial sides of flexor digitorum tendons to index and middle finger 3rd & 4th: adjacent sides of flexor digitorum profundus tendons to middle and ring, and ring and little fingers Insertion: radial sides of extensorexpansions (dorsal hood) ofdigits 2-5 Action: flex MCPjoints, extend IPjoints |
Lumbricals |
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Origin: adjacent surfaces of 1st/2nd,2nd/3rd, 3rd/4th, 4th/5thmetacarpals Insertion: 1st: radial side of base of proxphal. of 2nd digit, & dorsal hood 2nd: radial side of base of proxphal of 3rd digit, & DH 3rd: ulnar side of base of proxphal of 3rd digit, & DH 4th: ulnar side of base of proxphal of 4th digit, & DH Action: abduct 2nd, 3rd,& 4th digits(away from 3rd digit), assist flexion at MCP joints & extension at IP joints |
Dorsal Interossei |
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Origin: 1st: ulnar side of 2ndmetacarpal2nd: radial side of 4thmetacarpal3rd: radial side of 5thmetacarpal Insertion: 1st: ulnar side of prox phalanxof 2nd digit, & dorsal hood2nd: radial side of prox phalanxof 4th digit, & DH 3rd: radial side of prox phalanxof 5th digit, & DH Action: adduct 2nd, 4th & 5th digits (toward 3rd digit), assist flexion at MCP joints & ext at IP joints |
Palmer Interossei |