Carpal Tunnel Flashcards Preview

► Med Misc 25 > Carpal Tunnel > Flashcards

Flashcards in Carpal Tunnel Deck (19)
Loading flashcards...
1
Q

What is the carpal tunnel?

A

A narrow passageway found on the anterior portion of the wrist

2
Q

What does the carpal tunnel serve as?

A

The entrance to the palm for several tendons and the median nerve

3
Q

What is the carpal tunnel formed by?

A

Two layers, a deep carpal arch, and a superficial flexor retinaculum

4
Q

What does the deep carpal arch form?

A

A concave surface, which is converted into a tunnel

5
Q

How is the deep carpal arch converted into a tunnel?

A

By the overlying flexor retinaculum

6
Q

What shape is the carpal arch?

A

Concave on the palmar side

7
Q

What is the carpal arch formed by?

A

Laterally by scaphoid and trapezium tubercles

Medially by hook of hamate and pisiform

8
Q

What is the flexor retinaculum?

A

Thick connective tissue

9
Q

What does the flexor retinaculum do?

A

Turns the carpal arch into the carpal tunnel by bridging the space between medial and lateral parts of the arch

10
Q

Where does the flexor retinaculum originate?

A

On the lateral side

11
Q

Where does the flexor retinaculum insert?

A

On the medial side of the carpal arch

12
Q

What does the carpal tunnel?

A

9 tendons, surrounded by synovial sheaths, and the median nerve

13
Q

What tendons does the carpal tunnel contain?

A

The tendon of the flexor pollicis longus
4 tenson of the flexor digitorum profundus
4 tendons of the flexor digitorum superficialis

14
Q

What are the 8 tendons of the flexor digitorum profundus and superficialis surrounded by?

A

A single synovial sheath

15
Q

What is the tendon of the flexor pollicis longus surrounded by?

A

It’s own synovial sheath

16
Q

What do the synovial sheaths of the tendons in the carpal tunnel allow for?

A

Free movement of the tendons

17
Q

What happens once the median nerve passes through the carpal tunnel?

A

It divides into two branches, the recurrent branch and the palmar digital nerves

18
Q

What do the palmar digital nerves give?

A

Sensory innervation to the palmar skin and dorsal nail beds of the lateral three and a half digits
Motor innervation to the lateral two lumbricals

19
Q

What does the recurrent branch of the median nerve supply?

A

The thenar muscle group