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DPT 500-Anatomy and Histology > Upper Limb Muscles > Flashcards

Upper Limb Muscles Flashcards

(45 cards)

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1
Q

palmaris brevis

A

origin: palmar aponeurosis and flexor retinaculum

insertion: dermis of skin on the medial margin of the hand

innervation: superficial branch of the ulnar nerve (C8, T1)

function: improves grip

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2
Q

trapezius

A

origin: superior nuchal line, external occipital protuberance, medial margin of the ligamentum nuchae, spinous processes of CVII to TXII and the related supraspinous ligaments

insertion: superior edge spine of the scapula, acromion, posterior border of lateral one-third of clavicle

innervation: accessory nerve (CN 11)

function: descending: powerful elevator of the scapula; rotates the scapula upward during abduction of humerus above horizontal; transverse fibers retract scapula; ascending fibers depress scapula

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3
Q

deltoid

A

origin: spine of the scapula, acromion, anterior border of lateral 1/3 of clavicle

insertion: deltoid tuberosity of humerus

innervation: axillary nerve (CN5, CN6)

function: acromial fibers-major abductor of arm; clavicular fibers assist in flexing the arm; scapular fibers assist in extending the arm

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4
Q

levator scapulae

A

origin: transverse processes of C1 and C2 vertbebrawe and posterior tubercles of transverse processes of C3 and C4 vertebrae

insertion: medial border of scapula

innervation: dorsal scapular nerve (CN 5)

function: elevates the scapula

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5
Q

rhomboid minor

A

origin: lower end of ligamentum nuchae and spinous processes of C7 and T1 vertebrae

insertion: posterior surface of medial border of scapula at the root of the spine of the scapula

innervation: dorsal scapular nerve (C4, C5)

function: elevates and retracts the scapula

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6
Q

rhomboids major

A

origin: spinous processes of T2 -T5 vertebrae

insertion: posterior surface of medial border of scapula from the root of the spine of the scapula to the inferior angle

innervation: dorsal scapular nerve (C4, C5)

function: elevates and retracts the scapula

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7
Q

supraspinatus:

A

origin: supraspinous fossa of the scapula

insertion: most superior facet on the greater tubercle of the humerus

innervation: suprascapular nerve (C5, C6)

function: rotator cuff muscle, participates in abduction of the GH joint; stabilization of GH joint

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8
Q

Infraspinatus

A

origin: infraspinatus fossa of the scapula

insertion: middle facet on posterior surface of greater tubercle of humerus

innervation: suprascapular nerve (C 5, C 6)

function: rotator cuff muscle, lateral rotation of arm at GH joint; stabilization of GH joint

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9
Q

subscapularis

A

origin: subscapular fossa

insertion: lesser tubercle of humerus

innervation: upper (C5, C6) and lower (C5, C6, C7) subscapular nerves

function: rotator cuff muscle; medial rotation of the arm at the GH joint, stabilization of GH joint

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10
Q

teres minor

A

origin: lateral border of scapula

insertion: inferior facet on posterior surface of greater tubercle of humerus

innervation: axillary nerve (C5, C6)

function: rotator cuff muscle, lateral rotation of the arm at the GH joint; stabilization of GH joint

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11
Q

teres major

A

origin: inferior angle of scapula

insertion: medial lip of intertubercular sulcus

innervation: lower subscapular nerves (C5, C6, C7)

function: medial rotation and extension of the arm at the GH joint

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12
Q

coracobrachialis

A

origin: Apex of coracoid process

insertion: linear roughening on mid-shaft of humerus on medial side

innervation: musculocutaneous nerve (C5, C6, C7)

function: flexor of the arm at the GH joint

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13
Q

biceps brachii

A

origin: long head: supraglenoid tubercle of scapula; short head: coracoid process

insertion: radial tuberosity

innervation: musculocutaneous nerve (C5, C6)

function: powerful flexor of the forearm at the elbow joint and supinator of the forearm; accessory flexor of the arm at the GH joint

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14
Q

brachialis

A

origin: anterior aspect of humerus

insertion: tuberosity of ulna

innervation musculocutaneous nerve (C5, C6, C7)

function: powerful flexor of the forearm at the elbow joint

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15
Q

triceps brachii

A

origin: long head-infraglenois tubercle of scapula; medial head-posterior surface of humerus; lateral head: posterior surface of humerus

insertion: olecranon

innervation: radial nerve (C6, C7, C8)

function: extension of the forearm at the albow joint; long head extends and adducts the arm at the shoulder joint

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16
Q

flexor digitorum profundus

A

origin: ulna and interosseous membrane

insertion: palmar side of distal phalanges of digits 2-5

innervation: lateral half- anterior interosseous nerve (C8); medial half-ulnar nerve (C8, T1)

function: flexes distal interphalangeal joints

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17
Q

flexor pollicis longus

A

origin: radius and interosseous membrane

insertion: palmar side of distal phalynx of thumb

innervation: anterior interosseous nerve (C8)

function: flexes interphalangeal joints of the thumb

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18
Q

pronator quadratus

A

origin: distal anterior surface of ulna

insertion: distal anterior surface of radius

innervation: anterior interosseous nerve (C8)

function: pronation

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19
Q

flexor digitorum superficialis

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A

origin: humero-ulna head-medial epicondyle of humerus and coronoid process; radial head-oblique line of radius

insertion: palmar surfaces of the middle phalanges of medial 4 digits

innervation: median nerve (C8, T1)

function: flexes proximal interphalangeal joints

20
Q

flexor carpi ulnaris

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A

origin: humeral head-medial epicondyle of humerus ; ulnar head-olecranon

insertion: pisiform bone

innervation: ulnar nerve (C7, C8, T1)

function: flexes and adducts the wrist joint

21
Q

palmaris longus

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A

origin: medial epicondyle of humerus

insertion: palmar aponeurosis of hand

innervation: median nerve (C7, C8)

function: flexes wrist joint

22
Q

flexor carpi radialis

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A

origin: medial epicondyle of humerus

insertion: base of metacarpals 2-3

innervation: median nerve (C6, C7)

function: flexes and abducts the wrist

23
Q

pronator teres

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A

origin: humeral head-medial epicondyle and adjacent supraepicondylar ridge; ulnar head-coronoid process

insertion: midshaft of radius

innervation: median nerve (C6, C7)

function: pronation

24
Q

supinator

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A

origin: superficial layer-lateral epicondyle of humerus; deep layer-supinator crest of the ulna

insertion: radius superior to the anterior oblique line

innervation: posterior interosseous nerve (C6, C7)

function: supination

25
abductor pollicis longus
origin: ulna, radius, interosseous membrane insertion: lateral side of base of metacarpals 1 innervation: posterior interosseous nerve (C7, C8) function: abducts carpometacarpal joint of thumb
26
extensor pollicis brevis
origin: radius, interosseous membrane insertion: dorsal surface of base of proximal phalynx of the thumb innervation: posterior interousseous nerve (C7, C8) function: extends metacarpophalangeal joint of the thumb
27
extensor pollicis longus
origin: ulna, interosseous membrane insertion: dorsal surface of base of distal phalynx of thumb innervation: posterior interosseous nerve (C7, C8) function: extends interphalangeal joint of the thumb
28
extensor indicis
origin: ulna, interosseous membrane insertion: extensor hood of divit 2 innervation: posterior interosseous nerve (C7, C8) function: extends digit 2
29
brachioradialis
origin: lateral supracondylar ridge of humerus insertion: lateral surface of distal end of radius innervation: radial nerve (C5, C6) function: flex elbow
30
extensor carpi radialis longus
origin: lateral supracondylar ridge of humerus insertion: base of metacarpal 2 innervation: radial nerve (C6, C7) function: extends and abducts the wrist
31
extensor carpi radialis brevis
origin: lateral epicondyle of humerus insertion: base of matacarpals 2 and 3 innervation: posterior interosseous nerve (C7, C8) function: extends and abducts the wrist
32
extensor digitorum
origin: lateral epicondyle of humerus insertion: extensor hoods of digits 2-5 innervation: posterior interosseous nerve (C7, C8) function: extends digits 2-5
33
extensor digiti minimi
origin: lateral epicondyle of humerus insertion: extensor hood of the little finger (digit 5) innervation: posterior interosseous nerver (C7, C8) function: extends the little finger
34
extensor carpi ulnaris
origin: lateral epicondyle of humerus insertion: metacarpal 5 innervation: posterior interosseous nerve (C7, C8) function: extends and adducts the wrist
35
anconeus
origin: lateral epicondyle of humerus insertion: olecranon and proximal posterior surface of ulna innervation: radial nerve (C6, C7, C8) function: stabilizes the ulna in pronation; extends elbow
36
opponents digiti minimi
origin: hook of hamate and flexor retinaculum insertion: medial aspect of metacarpal 5 innervation: deep branch of ulnar nerve (C8, T1) function: laterally rotates metacarpal 5 (opposition)
37
abductor digiti minimi
origin: pisiform, the pisohamate ligament, and tendon of flexor carpi ulnaris insertion: proximal phalynx of little finger innervation: deep branch of ulnar nerve (C8, T1) function: abducts little finger at MCP joint
38
flexor digiti minimi brevis
origin: hook of the hamate and flexor retinaculum insertion: proximal phalynx of little finger innervation: deep branch of ulnar nerve (C8, T1) function: flexes little finger at MCP joint
39
lumbricals (4 muscles)
origin: tendons of flexor digitorum profundus insertion: extensor hoods of index, ring, middle, and little fingers innervation: medial 2 by deep branch of the ulnar nerve; lateral 2 by digital branches of the median nerve function: flex MCP joints while extending interphalangeal joints
40
dorsal interossei (4 muscles)
origin: adjacent sides of metacarpals insertion: extensor hood and base of proximal phalanges of digits 2-4 innervation: deep branch of ulnar nerve (C8, T1) function: abduction of index, middle, and ring fingers at the MCP joints
41
palmar interossei (3 or 4 muscles)
origin: sides of metacarpals insertion: extensor hoods (except middle finger) innervation: deep branch of ulnar nerve (C8, T1) function: adduction of the thumb, index, ring, and little fingers at the MCP joints
42
opponents pollicis
origin: tubercle of trapezium and flexor retinaculum insertion: lateral margin and adjacent palmar surface of metacarpal 1 innervation: recurrent branch of median nerve (C8, T1) function: medially rotates thumb
43
abductor pollicis brevis
origin: tubercles of scaphoid and trapezium and adjacent flexor retinaculum insertion: proximal phalynx and extensor hood of thumb innervation: recurrent branch of median nerve (C8, T1) function: abducts thumb at MCP joint
44
flexor pollicis brevis
origin: tubercle of the trapezium and flexor retinaculum insertion: proximal phalanx of the thumb innervation: recurrent branch of median nerve (C8, T1) function: flexes thumb at MCP joint
45
adductor pollicis
origin: transverse head-metacarpal 3; oblique head-capitate and bases of metacarpals 2-3 insertion: base of proximal phalanx and extensor hood of thumb innervation: deep branch of ulnar nerve (C8, T1) function: adducts thumb

DPT 500-Anatomy and Histology (12 decks)

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