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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
Origin: spinous process of C7&T1

Insertion: base of spine of scapula

Action: elevate scapula, may tilt neck to same side
Rhomboid Minor
Origin: spine of T2-5

Insertion: medial border of scapula between spine andinferior angle


Action: retract/adduct, rotate down, elevate & fix medial borderof scapula

Rhomboid Major
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
Origin: anterolateral surface of ribs 1-8




Insertion: costal (anterior) surface of medial border of scapula (mostly at the inferior angle

Action: protract scapula; assist upward rotation; depress shoulder (via lowerfibers); prevents wingingof scapula

Serratus Anterior
Origin: ventral aspect of ribs 3-5

Insertion: coracoid process of scapula

Action: depresses & protracts (stabilizes) shoulder
Pectoralis Minor
Origin: supraspinous fossa of scapula

Insertion: superior facet of greater tubercle of humerus

Action: abduct arm; fixes head of humerus in glenoid
Supraspinatus
Origin: infraspinous fossa of scapula

Insertion: middle facet of greater tubercle of humerus

Action: externally rotate arm; assist stabilization of head ofhumerus
Infraspinatus
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
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
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
Origin: subscapular fossa

Insertion: lesser tubercle of humerus

Action: internal rotation of arm, stabilization of glenohumeral joint
Subscapularis
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
Origin: spinous process T7-12,spinous process of lumbar and sacral vertetebrae via lumbodorsal fascia, iliac crest, and lower 4 ribs


Insertion: floor of bicipital groove of humerus

Action: extend, adduct, IR arm,depress & inferiorly rotate scapula/shoulder (exerts a strong downward pull on scapula via its insertion on humerus)

Latissimus Dorsi
Origin: tip of coracoid process of scapula

Insertion: middle third of medial shaft of humerus

Action: flex & adduct arm; helps stabilize glenohumeral joint
Coracobrachialis
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)

Origin: distal half of anteriour surface of humerus, and intermuscular septum

Insertion: coronoid process andulnar tuberosity

Action: flex forearm
Brachialis
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
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
Origin: medial epicondyle humerus

Insertion: base of 2nd and 3rd metacarpals bones

Action: flex wrist; radial deviationof hand; assist pronation
Flexor Carpi Radialis
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
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
Origin: lateral epicondyle of humerus

Insertion: base of 3rd metacarpal

Action: extension at wrist; radially deviate hand
Extensor Carpi Radialis Brevis
Origin: lateral supracondylar ridge of humerus

Insertion: base of 2nd metacarpal

Action: extension at wrist; radially deviate hand; weaksupinator
Extensor Carpi Radialis Longus
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
Origin: short head: tip of coracoid process of scapula

long head: Supraglenoidtubercule

Insertion: bicipital tuberosity of radius; via bicipital aponeurosis to deep fascia of medial forearm

Action: flex forearm; strong supinator to neutral from the pronated position; longhead assists arm flexion

Biceps Brachii
Origin: medial epicondyle of humerus

Insertion: palmar aponeurosis

Action: flexion at wrist
Palmaris Longus
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

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

Anconeus

Origin: lateral epicondyle of humerus




Insertion: extensor expansion of little finger




Action: extension at MCP and IP joints of little finger

Extensor Digiti Minimi

Extensor Digiti Minimi

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

Abductor Pollicis Longus

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

Extensor Pollicis Brevis

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

Extensor


Pollicis Longus

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

Extensor Indicus

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

Abductor Pollicis Brevis

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

Flexor Pollicis Brevis

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

Opponens Pollicis

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

Adductor Pollicis

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

Abductor Digiti Minimi

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

Flexor Digiti Minimi Brevis

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

Opponens Digiti Minimi

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

Lumbricals

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

Dorsal Interossei

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

Palmer Interossei