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M2 MSK > upper limb muscles > Flashcards

upper limb muscles Flashcards

(55 cards)

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1
Q

posterior proximal muscles to the shoulder (NOT shoulder muscles)

A

trapezius, levator scapulae, rhomboid major and minor, latissimus dorsi

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2
Q

trapezius origin, insertion, innervation

A

origin: C7-T12
insertion: superior nuchal line, lateral 1/3 of clavicle, spine of scapula
nerve: spinal accessory nerve (CNXI)

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3
Q

levator scapulae origin, insertion, innervation

A

origin: C1-C4
insertion: medial border of scapula
innervation: dorsal scapular nerve (branch of brachial plexus)

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4
Q

rhomboid major origin, insertion, innervation

A

origin: T2-T5
insertion: medial border of scapula
innervation: dorsal scapular nerve (branch of brachial plexus)

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5
Q

rhomboid minor origin, insertion, innervation

A

origin: C7-T1
insertion: medial border of scapula
innervation: dorsal scapular nerve (branch of brachial plexus)

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6
Q

latissimus dorsi origin, insertion, innervation

A

origin: T6-L5, inferior 4 ribs, iliac crest
insertion: bicipital groove of humerus
innervation: thoracodorsal nerve (branch of brachial plexus)

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7
Q

anterior proximal muscles to the shoulder (NOT shoulder muscles)

A

serratus anterior, pectoralis major and minor, subclavius

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8
Q

serratus anterior origin, insertion, innervation

A

origin: ribs 1-8
insertion: anterior surface of the medial border of the scapula
innervation: long thoracic nerve (C5, C6, C7)

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9
Q

pectoralis major origin, insertion, innervation

A

origin: (clavicular) medial 1/2 of clavicle, (sternocostal) anterior sternum and superior 6 costal cartilages
insertion: lateral lip of bicipital groove of humerus
innervation: lateral (from C5-C7) and medial pectoral nerves (both from brachial plexus)

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10
Q

pectoralis minor origin, insertion, innervation

A

origin: external surface of ribs 3-5, near costal cartilages
insertion: coracoid process of scapula
innervation: medial pectoral nerve

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11
Q

subclavius origin, insertion, innervation

A

origin: medial 1/3 of clavicle
insertion: 1st rib
innervation: nerve to subclavius

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12
Q

shoulder muscles

A

supraspinatus, infraspinatus, teres major and minor, subscapularis, deltoid

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13
Q

supraspinatus origin, insertion, innervation

A

origin: supraspinous fossa of scapula
insertion: greater tuberosity of humerus
innervation: suprascapular nerve (C4, C5, C6)

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14
Q

infraspinatus origin, insertion, innervation

A

origin: infraspinous fossa of the scapula
insertion: greater tuberosity of the humerus
innervation: suprascapular nerve (C5, C6)

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15
Q

teres minor origin, insertion innervation

A

origin: middle portion of the lateral border of the scapula
insertion: greater tuberosity of the humerus
innervation: axillary nerve (C5, C6)

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16
Q

subscapularis origin, insertion, innervation

A

origin: subscapular fossa of scapula
insertion: lesser tuberosity of the humerus
innervation: subscapular nerve (C5, C6, C7)

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17
Q

teres major origin, insertion, innervation

A

origin: posterior surface of the inferior angle of the scapula
insertion: medial lip of bicipital groove of humerus
innervation: lower subscapular nerve

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18
Q

deltoid origin, insertion, innervation

A

origin: (anterior) clavicle, (middle) acromion of scapula, (posterior) spine of scapula
insertion: deltoid tuberosity of the humerus
innervation: axillary nerve (C5, C6)

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19
Q

boundaries of the axilla (4)

A

anteriorly: pectoralis major and minor
posteriorly: subscapularis and scapula
medially: serratus anterior and 1-4 ribs
laterally: intertubercular groove

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20
Q

anterior muscles of the upper arm

A

coracobrachialis, biceps brachii, brachialis

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21
Q

coracobrachialis origin, insertion, innervation

A

origin: coracoid process of scapula
insertion: medial humerus
innervation: musculocutaneous nerve (branch of brachial plexus)

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22
Q

biceps brachii origin, insertion, innervation

A

origin: (long head) supraglenoid tubercle, (short head) coracoid process
insertion: radial tuberosity
innervation: musculocutaneous nerve (branch of brachial plexus)

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23
Q

brachialis origin, insertion, innervation

Study These Flashcards
A

origin: anterior surface of humerus
insertion: ulnar tuberosity
innervation: musculocutaneous nerve (branch of brachial plexus)

24
Q

posterior muscles of the upper arm

Study These Flashcards
A

anconeus, triceps brachii

25
anconeus origin, insertion, innervation
origin: lateral epicondyle of the humerus insertion: posterior surface of ulnar innervation: radial nerve
26
triceps brachii origin, insertion, innervation
origin: (long head) infraglenoid tubercle, (lateral head) posterior humerus, (medial head) posterior humerus insertion: olecranon of the ulna innervation: radial nerve
27
anterior muscles of the lower arm
superficial: pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris intermediate: flexor digitorum superficialis deep: flexor digitorum profundus, flexor pollicis longus, pronator quadratus
28
pronator teres origin, insertion, innervation
origin: medial epicondyle of humerus + coronoid process of ulna insertion: lateral surface of radius innervation: median nerve
29
flexor carpi radialis origin, insertion, innervation
origin: medial epicondyle of humerus insertion: bases of 2nd metacarpal innervation: median nerve
30
palmaris longus origin, insertion, innervation
origin: medial epicondyle of humerus insertion: flexor retinaculum and palmar aponeurosis innervation: median nerve
31
flexor carpi ulnaris origin, insertion, innervation
origin: medial epicondyle of humerus + olecranon of ulna insertion: pisiform, hook of hamate and base of 5th metacarpal innervation: ulnar nerve
32
flexor digitorum superficialis origin, insertion, innervation
origin: medial epicondyle of humerus, coronoid process of ulna, superior 1/2 of radius insertion: middle phalanx of medial 4 fingers innervation: median nerve
33
flexor digitorum profundus origin, insertion, innervation
origin: ulna and interosseous membrane insertion: distal phalanges of medial 4 fingers innervation: ulnar nerve (medial 1/2) and median nerve (lateral 1/2)
34
flexor pollicis longus origin, insertion, innervation
origin: radius and adjacent interosseous membrane insertion: distal phalanx of thumb innervation: median nerve
35
pronator quadratus origin, insertion, innervation
origin: anterior surface of shaft of ulna insertion: anterior surface of shaft of radius innervation: median nerve
36
cubital fossa boundaries
medial: pronator teres lateral: brachioradialis superior: lateral and medial epicondyles of humerus floor: brachialis and supinator roof: deep fascia and bicipital aponeurosis
37
contents of cubital fossa of the elbow (Mother Bought Ten Rabbits)
**median nerve**, bifurcation of **brachial artery** (into radial and ulnar arteries), tendon of **biceps brachii**, **radial nerve**, cephalic vein, basilic vein, median cubital vein
38
carpal tunnel boundaries
floor: carpal tunnel bones roof: flexor retinaculum spans over the carpal bones, scaphoid lunate triquetrum pisiform trapezium trapezoid capitate hamate
39
posterior lower arm muscles
extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris, brachioradialis, abductor pollicis longus, extensor pollicis longus, extensor pollicis brevis, extensor indicis, supinator
40
posterior arm muscles originating from the lateral supracondyle of the humerus (and their insertions)
extensor carpi radialis longus, inserts at base of 2nd metacarpal brachioradialis, inserts at midshaft of radius
41
posterior arm muscles originating from the lateral epicondyle of the humerus (and their insertions)
1. extensor carpi radialis brevis (base of 3rd metacarpal) 2. extensor digitorum (middle + distal phalanges of medial 4 fingers) 3. extensor digiti minimi (extensor expansion of little finger) 4. extensor carpi ulnaris (base of 5th metacarpal) 5. supinator (proximal 1/3 of radius)
42
abductor pollicis longus origin, insertion, innervation
origin: posterior surface of shafts of radius and ulna insertion: base of 1st metacarpal innervation: radial nerve
43
extensor pollicis longus origin, insertion, innervation
origin: posterior surface of shaft of radius insertion: base of 1st metacarpal innervation: radial nerve
44
extensor pollicis brevis origin, insertion, innervation
origin: posterior surface of shaft of radius insertion: base of proximal phalanx of thumb innervation: radial nerve
45
extensor indicis origin, insertion, innervation
origin: posterior surface of shaft of ulna insertion: extensor expansion of index finger innervation: radial nerve
46
thenar muscles and innervation
abductor pollicis brevis (median nerve), flexor pollicis brevis (median nerve), opponens pollicis (median nerve), adductor pollicis (ulnar nerve)
47
short muscles of the hand (lumbricals) origin, insertion, innervation
origin: tendons of flexor digitorum profundus insertion: lateral extensor expansions of digits 2-5 innervation: median nerve (lumbricals 1-2), ulnar nerve (lumbricals 3-4)
48
dorsal interossei origin, insertion, innervation
origin: metacarpals insertion: extensor expansion and bases of proximal phalanges innervation: ulnar nerve to abduct the digits!
49
palmar interossei origin, insertion, innervation
origin: metacarpals insertion: extensor expansion and bases of proximal phalanges innervation: ulnar nerve
50
contents of the axilla
brachial plexus, axillary artery and branches, axillary vein, axillary lymph nodes
51
carpal tunnel contents
median nerve, flexor digitorum superficialis, flexor digitorum profundus, flexor pollicis longus
52
carpal tunnel syndrome pathogenesis and presentation
pathogenesis: compression of the median nerve within the tunnel (due to thickening of synovial sheaths/arthritic changes in carpal bones) presentation: burning pain along the median nerve to lateral 3.5 fingers and weakness of thenar muscles, positive Phalen's sign and Tinel's sign
53
positive Phalen's sign and indication
flexion of the wrist (90°) for 30-60s will compress the carpal tunnel, producing carpal tunnel syndrome signs
54
positive Tinel's sign and indications
palpation of median nerve when it runs superficially results in tingling in the distal portions supplied (lateral 3.5 fingers), indicates carpal tunnel syndrome
55
anatomical snuffbox boundaries and significance
medial: tendon of extensor pollicis longus lateral: tendons of abductor pollicis longus and extensor pollicis brevis significance: area to palpate the scaphoid bone (checking for fracture) and pulsations of the radial artery

M2 MSK (10 decks)

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