cubital fossa/anterior forearm LOs Flashcards
1
Q
abductor pollicis longus m.
A
- BL: proximal posterior radius/ulna, interossesous membrane > base of first metacarpal, trapezium
- action: adducts/extends thumb at carpometacarpal joint, abducts hand at wrist (radial deviation)
- innervation: radial nerve
- SC: C6-8
2
Q
brachioradialis m.
A
- BL: lateral supracondylar ridge of humerus > distal radius lateral to styloid process
- action: flexes elbow
- innervation: radial nerve
- SC: C5-6
3
Q
extensor carpi radialis brevis m.
A
- BL: lateral epicondyle of humerus > base of 3rd metacarpal
- action: extends and abducts hand at wrist
- innervation: radial nerve
- SC: C6-8
4
Q
extensor carpi radialis longus m.
A
- BL: lateral supracondylar ridge of humerus > base of 2nd metacarpal
- action: extends and abducts hand at wrist, assists in elbow flexion
- innervation: radial nerve
- SC: C6-8
5
Q
extensor carpi ulnaris m.
A
- BL: lateral epicondyle of humerus > base of 5th metacarpal
- action: extends and adducts wrist
- innervation: radial nerve
- SC: C6-8
6
Q
extensor digitorum m.
A
- BL: lateral epicondyle of humerus > extensor expansions of digits 2-5
- action: extends phalanges (at metacarpophalangeal, second at interphalangeal), extends wrist
- innervation: radial nerve
- SC: C6-8
7
Q
extensor digiti minimi m.
A
- BL: lateral epicondyle of humerus > digitial expansion of 5th digit
- action: extends 5th digit (metacarpophalangeal and interphalangeal)
- innervation: radial nerve
- SC: C7-8
8
Q
extensor indicis m.
A
- BL: posterior surface of ulna, interosseous membrane > digital expansion of 2nd digit
- action: extends 2nd digit (metacarpophalangeal and interphalangeal)
- innervation: radial nerve
- SC: C7-8
9
Q
extensor pollicis brevis m.
A
- BL: posterior radial surface, interosseous membrane > base of 1st proximal phalanx
- action: extends thumb (metacarpophalangeal), extends and abducts CMC joint
- innervation: radial nerve
- SC: C6-8
10
Q
extensor pollicis longus m.
A
- BL: middle 1/3 of posterior ulna, interosseous membrane > base of 1st distal phalanx
- action: extends thumb (CMC, metacarpophalangeal, interphalangeal)
- innervation: radial nerve
- SC: C6-8
11
Q
flexor carpi radialis m.
A
- BL: medial epicondyle > palmar aspect of base of 2nd metacarpal
- action: flexes and abducts hand at wrist, pronation of forearm, flexion of elbow
- innervation: median nerve
- SC: C6-8
12
Q
flexor carpi ulnaris m.
A
- BL: medial epicondyle, proximal ulnar shaft > pisiform
- action: flexes and adducts hand at wrist, flexion of elbow
- innervation: ulnar nerve
- SC: C7-T1
13
Q
flexor digitorum profundus m.
A
- BL: anterior proximal 2/3 of ulna, interosseous membrane > base of distal phalanges of digits 2-5
- action: flexion of digits 2-5 (metacarpophalangeal, distal interphalangeal, proximal interphalangeal), flexion of hand at wrist
- innervation: anterior interosseous of median nerve (digits 2-3), ulnar nerve (digits 4-5)
- SC: C7-T1
14
Q
flexor digitorum superficialis m.
A
- BL: medial epicondycle > sides of middle phalanges of digits 2-5
- action: flexion of digits (metacarpophalanges, PIP), flexion of hand at wrist
- innervation: median nerve
- SC: C7-T1
15
Q
flexor pollicis longus m.
A
- BL: anterior surface of radius, interosseous membrane > base of distal phalanx of thumb
- action: flexes thumb (metacarpophalangeal and interphalangeal)
- innervation: anterior interosseous nerve of median n.
- SC: C7-T1
16
Q
palmaris longus m.
A
- BL: medial epicondyle > palmar aponeurosis
- action: flexes hand at wrist, tenses palmar fascia
- innervation: median nerve
- SC: C7-8
17
Q
pronator quadratus m.
A
- BL: anterior surface of distal ulna > anterior surface of distal radius
- action: ponates forearm
- innervation: anterior interosseous nerve of median nerve
- SC: C8-T1
18
Q
pronator teres m.
A
- BL: medial epicondyle, ulnar coronoid process > lateral aspect of radius
- action: pronates and flexes forearm
- innervation: median nerve
- SC: C6-7
19
Q
supinator m.
A
- BL: lateral epicondyle, radial collateral ligament, supinator crest of ulna > lateral surface of proximal radius
- action: supinates forearm
- innervation: radial nerve
- SC: C5-6
20
Q
humeroulnar joint classification
A
ginglymus/hinge
21
Q
humeroradial joint classification
A
radial/gliding
22
Q
proximal radio-ulnar joint classification
A
pivot/trochoid
23
Q
ulnar collateral ligament
A
- attachments: medial epicondyle > medial margin of coronoid process, olecranon process
- function: resists excessive cubital valgus
24
Q
radial collateral ligament
A
- attachments: lateral epicondyle > anular ligament
- function: resists excessive cubital varus
25
Q
annular ligament
A
- attachments: anterior margin of radial notch > posterior margin of radial notch surrounding head of radius
- function: stabilizes proximal radioulnar joint
26
Q
interosseous membrane
A
- attachment: interosseous border of radius > interosseous border of ulna
27
Q
collateral circulation around elbow
A
axillary artery | teres major | brachial artery
- ulnar side:
- superior ulnar collateral <> posterior ulnar recurrent (ulnar a.)
- inferior ulnar collateral <> anterior ulnar recurrent (ulnar a.)
- brachial | ulnar | superficial palmar arch
- brachial | common interosseous | anterior interosseous, posterior interosseous (recurrent interosseous)
- radial side:
- profunda brachii | radial collateral, middle collateral
- radial collateral <> radial recurrent
- middle collateral <> recurrent interosseous
- brachial | radial | deep palmar arch
29
Q
radial head subluxation
A
- proximal radial head subluxates from anular ligament on lateral side of elbow due to pulling force
- monkey bars, swinging child by hands
- radial head not fully ossified in childhood
33
Q
A
ulna (cross section)
34
Q
A
radius (cross section)
35
Q
A
flexor digitorum superficialis (corss section)
36
Q
A
flexor digitorum profundus (cross section)
37
Q
A
flexor carpi ulnaris (cross section)
38
Q
A
extensor indicis (cross section)
39
Q
A
interosseous membrane (cross section)
40
Q
A
pronator quadratus (cross section)
