Lecture 6: Flexor Forearm & Hand

Question 1

Where do most anterior (flexor) muscles originate?

Answer 1

Common flexor tendon on medial epicondyle

Question 2

What nerves innervate most muscles of anterior compartment of forearm?

Answer 2

Median N

Question 3

What innervates the FCU

Answer 3

Ulnar N

Question 4

What innervates FDP

Answer 4

Ulnar N

Question 5

What are the superficial muscles of the anterior forearm?

Answer 5

Flexor Carpi Radialis
Flexor Carpi Ulnaris
Flexor Digitorum Superficialis
Pronator Teres
Palmaris Longus

Question 6

What is the function of the FCR

Answer 6

Flex + ABDuct wrist

Question 7

What is the function of the FCU

Answer 7

Flex + ADDuct wrist

Question 8

What is the function of the FDS

Answer 8

Flex wrist + digits

Question 9

What is the function of pronator teres

Answer 9

Pronate

Question 10

Palmaris longus function

Answer 10

Flex wrist

Question 11

What are the deep muscles of forearm (ant)

Answer 11

Flexor pollicis longus
Flexor digitorum profundus
Pronator quadratus

Question 12

FPL function

Answer 12

Flex thumb

Question 13

FDP function

Answer 13

Flex wrist + Digits

Question 14

Pronator Quadratus function

Answer 14

Pronates

Question 15

Describe the vasculature of the forearm

Answer 15

Ulnar & Radial A

Question 16

Ulnar Artery and its subdivisions

Answer 16

Ulnar A –> Common interosseous A –> Anterior Interosseous –> Posterior interosseous

Question 17

Does the median N travel through the carpal tunnel?

Answer 17

yes!

Question 18

What two muscles does the median N not supply in ant forearm?

Answer 18

FCP, Medial 1/2 FDP

Question 19

What are the branches of median nerve?

Answer 19

Anterior interosseous N + Palmar cutaneous branch (over Flexor Ret.)

Question 20

Where does the Ulnar N run in the forearm?

Answer 20

Behind medial epicondyle, along ulna, to hand

Question 21

What does the ulnar N supply in forearm?

Answer 21

-FCU, medial 1/2 FDP

Question 22

What type of joint is the radiocarpal jt?

Answer 22

Condylooid (ellipsoid) synovial joint

Question 23

What are the movements of the wrist joint with the intercarpal joint?

Answer 23

Full ROM - flexion, extension, ADDuction, ABDuction, circumduction

Question 24

What is deep to the flexor retinaculum?

Answer 24

Carpal Tunnel

Question 25

What are the lateral attachements of the flexor retinaculum?

Answer 25

-Scaphoid -Trapezium

Question 26

What are the medial attachments of the flexor retinaculum?

Answer 26

-Pisiform -Hamate

Question 27

What are the contents of the carpal tunnel?

Answer 27

Flexor digitorum superficialis & profundus Flexor pollicis longus Median N

Question 28

Does the Radial N & A travel in the carpal tunnel?

Answer 28

No

Question 29

Does the Ulnar N & Artery travel in the carpal tunnel

Answer 29

No

Question 30

Does the palmar cutaneous branch of median N travel through carpal tunnel?

Answer 30

No

Question 31

What forms the floor of the anatomical snuff box?

Answer 31

Scaphoid bone

Question 32

Where does the radial A travel in the wrist region?

Answer 32

Snuff box

Question 33

What tendons bound the anatomical snuff box?

Answer 33

-ABDuctor pollicis longus -Extensor pollicis brevis -Extensor pollicis longus

Question 34

What is a triangular-shaped thickening of deep fascia on the palm?

Answer 34

Palmar Aponeurosis

Question 35

What is the function of the palmar aponeurosis?

Answer 35

Provide a firm attachement to skin and this improve grip Structure protection

Question 36

What are the compartments of the hand?

Answer 36

-Thenar -Central -Hypothenar

Question 37

What are the muscles around the metacarpals (compartment)?

Answer 37

Interosseous compartment

Question 38

What are the 3 muscles of the thenar compartment?

Answer 38

-Flexor pollicis brevis -ABDuctor pollicis brevis -Opponens pollicis

Question 39

What innervates the thenar compartment?

Answer 39

Recurrent branch - Median N

Question 40

What are the 3 muscles of the hypothenar compartment?

Answer 40

Flexor digiti minimi ABDuctor digiti minimi Opponens digiti Minimi

Question 41

What is the innervation of the hypothenar compartment?

Answer 41

Deep branch of ulnar N

Question 42

What is found in the central compartment?

Answer 42

FDS amd FDP tendons Lumbricals Superficial and deep palmar arteries branches of median and ulnar N

Question 43

What are the muscles of the interosseous compartment?

Answer 43

-ADDuctor pollicis -Palmar interossei -Dorsal interossei

Question 44

Muscles of the interosseous compartment are innervated by

Answer 44

Deep branch of Ulnar N

Question 45

Function of lumbrical and interossei muscle

Answer 45

Flex the MP joints + extend the PIP and DIP joints

Question 46

What is the innervation of the lateral 2 lumbricals?

Answer 46

median N

Question 47

What is the innervation of the medial 2 lumbricals?

Answer 47

Deep branch of ulnar N

Question 48

Innervation of palmar interossei

Answer 48

Deep branch of ulnar N

Question 49

Function of palmar interossei

Answer 49

ADduct the fingers

Question 50

Innervation of dorsal interossei

Answer 50

Deep branch of ulnar N

Question 51

Function of Dorsal interossei

Answer 51

ABduct fingers

Question 52

The superficial palmar arch is formed primarily from the _________ artery. The deep palmar arch is formed by the _________ artery.

Answer 52

Ulnar; Radial