UE (Exam 2) Muscles/Attach/Innervat

Question 0

Palmar Interossei

Answer 0

Deep Ulnar N C8,T1
metacarpal shaft//extensor expansion
MCP flex, ext PIP/DIP, MCP adduct

Intermetacarpal compartment

Question 1

Dorsal Interossei

Answer 1

Deep Ulnar N: C8,T1
Metacarpal shaft//extensor expansion
Flex MCP, extend PIP/DIP, MCP abd

Intermetacarpal compartment

Question 2

adductor pollicis

Answer 2

Deep Ulnar N: C8,T1
Origin: 
-Transverse head:3rd MC shaft
-Oblique head: capitate/trapezoid & base of their MC's
Insertion: proximal phalanx of thumb

Action:

• ulnar adduction of thumb
• adduct CMP, flex MCP of thumb

part of adductor compartment

Question 3

Lumbricals

Answer 3

Digits 2,3: median N C8,T1
Digits 4,5: deep Ulnar N C8,T1

FDP tendon//extensor expansion (slightly distal to interossei)

Flex MCP, extend PIP/DIP

Question 4

Abductor Digiti Minimi

Answer 4

Deep Ulnar N: C8,T1
Origin: flexor retinacul, pisiform
insert: ulnar side of prox phalanx of little finger

action: abd CMC, MCP
Hypothenar compartment

Question 5

flexor digiti minimi brevis

Answer 5

deep Ulnar N C8,T1
O:flexor retinacul, hook of hamate
I: lnar side of base of prox phalanx
A:flex CMC, MCP
Hypothenar compartment

Question 6

opponens digiti minimi

Answer 6

deep ulnar N: C8,T1
O:flexor retinacul, hook of hamate
I: body of MC of little finger (ulnar side)
A: circumduction of little finger toward thumb by flex, med rot of MC @ CMC jt
Hypothenar compartment

Question 7

Palmaris Brevis

Answer 7

superficial Ulnar N C8,T1
O:palmar aponeurosis, flex retinacul
I:skin over hypothenar compartment
A:pulls skin over hypothenar toward mid palm-->protect ulnar A&N
Hypothenar compartment

Question 8

Abductor Pollicis Brevis

Answer 8

recurrent branch of median N C8,T1
O: flexor retinacul, tubercle of scaphoid/trapezium
I: palmar radial side of base of prox thumb
A:radial abd of thumb @ CMC; assist in opposition
Thenar compartment

Question 9

flexor pollicis brevis

Answer 9

superficial head:recurrent branch of median N C8,T1
deep head: deep ulnar N C8, T1
O: tubercle of trapezium, flex retinacul
I:palmar radial side of base of prox thumb
A: flex MCP, CMC
thenar compartment

Question 10

Opponens pollicis

Answer 10

recurrent branch of median N C8,T1
O: flexor retinacul, tubercle of trapezium
I:radial side of MC
A:circumduction of thumb toward mid palm, medial rotation of MC (both at CMC)
Thenar compartment

Question 11

supinator

Answer 11

deep radial N C5,6
O: supinator crest, lat epi, RCL and annular lig
I:dorsal, lateral, palmar surface of prox radius
A: supinate @ prox rad-uln jt; stabilize prox rad-uln jt
Deep posterolateral compartment of forearm

Question 12

Abductor pollicis longus

Answer 12

deep radial N C7,8
O: posterior surface of middle ulna & radius; interosseous memb
I: dorsal base of MC
A: abd of CMC, radial dev, assists in supination
Deep posterolateral compartment of forearm

Question 13

Extensor Pollicis Longus

Answer 13

deep radial N C7,8
O: posterior surface of middle ulna; interosseous memb
I:dorsal base of distal thumb
A: extension of IP, MCP, CMC; Radial dev; assists in supination
deep posterolateral forearm

Question 14

extensor pollicis brevis

Answer 14

deep radial N C7,8
O: posterior surface of middle radius; interosseous memb
I:dorsal base of prox thumb
A:extension of MCP, CMC; rad dev; assists in supination
deep posterolateral forearm

Question 15

Extensor indicis

Answer 15

deep radial N C7,8
O: posterior surface of distal ulna; interosseous memb
I: extensor assembly of index finger
A: extension of DIP, PIP, MCP, CMC, wrist
deep posterolateral forearm

Question 16

brachioradialis

Answer 16

radial N C5,6
O: prox lateral supracondylar ridge
I: lateral base, styloid process of radius
A:flex humeroulnar, humeroradial jts, assists in supination to neutral
superficial lateral group

Question 17

extensor carpi radialis longus

Answer 17

radial N C6,7
O:distal lateral supracondylar ridge
I: base of 2nd MC
A: extension of radial wrist, radial deviation
superficial lateral group

Question 18

extensor carpi radialis brevis

Answer 18

deep radial N C7
O:lateral epi via common ext tend; Rad Collateral Lig
I: base of 3rd MC
A: wrist ext
superficial lateral group

Question 19

extensor digitorum

Answer 19

deep radial N C7,8
O: lateral epi (common ext tend)
I: extensor assembly D2-5
A: extension of DIP, PIP, MCP, wrist
superficial posterior compartment of forearm

Question 20

extensor digiti minimi

Answer 20

deep radial N C7,8
O: lat epi (common ext tend)
I: extensor assembly of little finger
A: extend DIP, PIP, MCP of little finger
superficial posterior group

Question 21

extensor carpi ulnaris

Answer 21

deep radial N C7,8
O: lateral epi (common ext tend), post ulna
I:dorsal base of 5th MC
A: ext of ulnar side of wrist; ulnar dev
superficial posterior group

Question 22

pronator teres

Answer 22

median N C6,7
O: medial epi (common flex tend); coronoid process
I: middle 1/3 of lateral radius
A: pronation @ prox/dist radioulnar jt; elbow flex; stabilize prox radioulnar jt.
Anteromedial compartment

Question 23

flexor carpi radialis

Answer 23

median N C6,7
O: medial epi (common flex tend)
I:palmar base of MC 2&3 (index, middle)
A:flexion of radial side of wrist; rad dev @ midcarpal jt; elbow flex
anteromedial compartment

Question 24

palmaris longus

Answer 24

``` median N C7 O: med epi (common flex tendon) I: palmar aponeurosis, flex retinacul A: flexion of radiocarpal jt; tenses palmar aponeurosis Anteromedial compartment ```

Question 25

Flexor Digitorum Superficialis

Answer 25

``` median N C7,8 O: med epi (common flex tendon); coronoid process;central anterior radius I: sides of middle phalanx of digits 2-5 A: flex PIP, MCP, wrist, elbow anteromedial compartment ```

Question 26

flexor carpi ulnaris

Answer 26

ulnar N C8,T1 O: med epi (common flex tendon); olecranon, prox posterior ulna I: palmar base of little finger, pisiform, hook of hamate;tendon continuous as pisohamate, pisometacarpal A: flexion of ulnar side of wrist; uln dev @ midcarpal jt; elbow flex anteromedial compartment

Question 27

Flexor Digitorum Profundus

Answer 27

``` C8,T1 Anterior interosseous N: D2,3 ulnar N: D4,5 O: prox anterior & medial shaft of ulna; medial coronoid process;interosseous compartment I:base of distal digits 2-5 A:flexion of DIP, PIP, MCP, CMC deep anteromedial compartment ```

Question 28

flexor pollicis longus

Answer 28

anterior interosseous N C8,T1 O: anterior shaft of radius; interosseous memb I: palmar base of distal thumb A: flexion of IP, MCP, CMC; assists in wrist flex, pronation Deep anteromedial compartment

Question 29

pronator quadratus

Answer 29

``` Anterior Interosseous N: C8,T1 O:distal anterior ulna I: distal anterior radius A:pronation at prox/distal radioulnar jt; stabilizes distal radioulnar jt Deep anteromedial compartment ```

Question 30

Triceps

Answer 30

radial N C6,7,8 O: -long head: infraglenoid tubercle -lateral head: upper lateral/posterior humerus (prox to rad groove) -short head: lower medial/posterior humerus (distal to rad groove) I: posterior, superior olecranon A: elbow extension (all three heads); GH Ext and Add (long head) Posterior compartment

Question 31

anconeus

Answer 31

radial N C7,8 O: posterior surface of lateral epicondyle I: lateral aspect of olecranon and posterior prox ulna A: extend elbow posterior compartment

Question 32

coracobrachialis

Answer 32

``` musculocutaneous N C5,6,7 lateral cord O: tip of coracoid process I: anteromedial aspect of mid humerus A: GH flex; assists in GH adduct when humerus abducted Anterior compartment of arm ```

Question 33

Biceps brachii

Answer 33

Musculocutaneous N (C5,6) O: -long head (labrum/supraglenoid tubercle) -short head (tip of coracoid process) I: radial tuberosity, bicipital aponeurosis A:elbow flex; supination; assists in GH flex; GH abd (long head when arm is externally rotated) Anterior compartment of arm

Question 34

brachialis

Answer 34

``` musculocutaneous N C5,6 O: distal half of anterior humerus I: coronoid process, ulnar tuberosity A: elbow flex Anterior compartment of arm ```