Posterior Forearm and Hand

Question 1

Posterior compartment of forearm layers

Answer 1

Deep and superficial

Question 2

Most extensors arise from

Answer 2

lateral epicondyle

Question 3

Muscles of superficial layer of posterior

Answer 3

Brachioradialis 
Extensor carpi radialis longus 
Extensor carpi radialis brevis 
Extensor digitorum
Extensor carpi ulnaris 
Extensor carpi minimi

Question 4

Muslces of deep layer of posterior

Answer 4

Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Extensor indices
Supinator

Question 5

All muscles of posterior compartment innervated by the

Answer 5

radial nerve

Question 6

Brachioradialis function and innervation

Answer 6

Flexes forearm
Radial nerve
Crosses anterior to the elbow joint

Question 7

Extensor carpi radialis longus function and innervation

Answer 7

Radial

Extends and abducts wrist

Question 8

Extensor carpi radialis brevis function and innervation

Answer 8

Extends and abducts writst radial

Question 9

Extensor digitorum function and innervation

Answer 9

Extends fingers and wrist

Radial

Question 10

Extensor digiti minimi function and innervation

Answer 10

Extends digit 5 and wrist

Radial

Question 11

Extensor carpi ulnaris function and innervation

Answer 11

Extends and adducts wrist Radial

Question 12

Supinator function and innervation

Answer 12

Supinates forearm

Radial

Question 13

Abductor pollicis longus function and innervation

Answer 13

Radial

Abducts and extends thumb

Question 14

Extensor pollicis longus function and innervation

Answer 14

Extends 1st digit at MCP joint

Radial nerve

Question 15

Extensor indicis function and innervation

Answer 15

Extends digit 2

Radial

Question 16

Extensor expansion

Answer 16

Mostly works on the MCP

Connects extensors of the hand

Question 17

Radial artery forearm location

Answer 17

Deep to brachioradialis

Question 18

Ulnar artery location

Answer 18

Deep to flexor carpi ulnaris

Question 19

Which branch does common intnerosseus artery come from?

Answer 19

Ulnar artery

Question 20

Median nerve innervation and location

Answer 20

Between flexor digitorum superficialis and profundus

Innervates all anterior except flexor carpi ulnaris and medial half of flexor digitorum profundus

Question 21

Ulnar nerve location and innervation

Answer 21

Medial side deep to flexor carpi ulnaris

Innervates flexor carpi ulnairs and medial half of flexor digitorum ulnais

Question 22

Radial nerve location and innervation

Answer 22

Enters between brachioradialis and brachialis
Deep branch supplies all extensors
Superficial has no muscular or cutaneous in the forearm

Question 23

Compartments of hand

Answer 23

Thenar compartment
Hypothenar compartment
Central compartment
Adductor-interosseus compartment

Question 24

Compartments of hand separated by

Answer 24

Fascial septa

Question 25

Central compartment limited by the

Answer 25

``` Palmar aponeurosis (anterior) Thenar septum (laterally) Hypothenar septum (medially) Palmar interosseus fascia (posteriorly) ```

Question 26

Palmar aponeurosis

Answer 26

Covers palm between thenar and hypothenar eminences

Question 27

Tendon of palmaris longus inserts into

Answer 27

Palmar aponeurosis

Question 28

Thenar compartment muslces and innervation

Answer 28

``` Abductor pollicis brevis Flexor pollicis brevis Opponens pollicis Median nerve Position and move thumb ```

Question 29

Hypothenar muscles and innervation

Answer 29

``` Abductor digiti minimi Flexor digiti minimi Opponens digiti minimi Ulnar Position and move little finger ```

Question 30

Central compartment muscles and innervations

Answer 30

Lumbricals (medial 2 ulnar nerve, lateral 2 median nerve) Tendons of flexor digitorum superficialis Tendons of flexor digitorum profundus

Question 31

Lumbricals

Answer 31

Worm-like muscles that attach tendons of flexor digitorum profundus to the extensor expansions

Question 32

Lumbrical function and innervation

Answer 32

Flex MCP joints and extend IP joints 1 and 2 - median 3 and 4 - ulnar

Question 33

Adductor-interosseus compartment muscles and innervation

Answer 33

Adductor pollicis Palmar interossei Dorsal interossei Ulnar nerve

Question 34

Palmar interossei function

Answer 34

adduction - 2,4,5

Question 35

Dorsal interossei function

Answer 35

Abduction - 2,3,4

Question 36

Adductor pollicis function and innervation

Answer 36

Adducts thumb | Ulnar

Question 37

Dorsum of hand contains

Answer 37

Dorsal tendon compartment for extensor compartment of forearm

Question 38

Extensor retinaculum

Answer 38

Binds tendons to dorsal aspect of the hand

Question 39

Only muscles intrinsic to dorsum of hand

Answer 39

Dorsal interosseus muslces

Question 40

Synovial sheaths

Answer 40

Enclose tendons of the flexors and extensors to reduce friction during movement

Question 41

Flexor retinaculum

Answer 41

Forms carpal tunnel | Attaches carpal bones

Question 42

Digital fibrous sheaths

Answer 42

Fibrous bands superficial to the synovial digital tendon sheaths in the fingers Prevents bowing of tendons when muscles contract

Question 43

What does carpal tunnel contain

Answer 43

Tendons of flexor digitorum superficialis, flexor digitorum profundus, flexor pollicis longus, and median nerve,

Question 44

Palmaris longus lies

Answer 44

Superficial to flexor retinaculum and ends in palmar aponeurosis

Question 45

Flexor carpi radialis lies

Answer 45

In its own connective tissue sheath

Question 46

Carpal tunnel syndrome

Answer 46

Compresses median nerve | Affects mostly the index and middle fingers

Question 47

Radial and ulnar artery location

Answer 47

Superficial to flexor retinaculum

Question 48

Superficial palmar arch

Answer 48

Formed by anastomosis between ulnar and branch of radial artery

Question 49

Common palmar digital arteries

Answer 49

Originate from superficial palmar arch

Question 50

Proper palmar digital arteries

Answer 50

Branches of common palamr digital arteries and supply sides of 2,3,4,5

Question 51

Deep palmar arch

Answer 51

Formed by anastomsis between branch of ulnar and radial artery

Question 52

Palmar metacarpal arteries

Answer 52

Supplement superficial palmar arteries by anastomosis with common palmar arteries

Question 53

Princeps pollicis

Answer 53

Radial artery branch supplying thumb

Question 54

Radial indeces

Answer 54

Radial artery branch supplying index finger

Question 55

Where is deep arch located toward (radius or ulna)

Answer 55

Radial

Question 56

Anatomical snuff box boundaries

Answer 56

Extensor pollicis longus posteriorly | Extensor pollicis brevis and abductor pollicis longus anteriorly

Question 57

What artery passes through snuff box?

Answer 57

Raidal

Question 58

What forms floor of snuff box?

Answer 58

Scaphoid and trapezium