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Question 1

What Extensor Retinacular Compartment is effected by dequervain’s syndrome?

Answer 1

1

With apple peanutbutter

Abductor Pollicus Longus

and Extensor Pollicus Brevis

Question 2

What subcutaneous nerve is innervating this area?

Answer 2

Radial Nerve c6-c8

Question 3

What subcutaneous nerve is innervating this area?

Answer 3

Medial cutaneous nerve of forearm (c8 t1)

Question 4

A FOOSH injury is most likely to injure what carpal?

Answer 4

scaphoid

Question 5

What tendons are in compartment 1 and compartment 2?

Answer 5

1. Abductor Pollicus Longus, Extensor Pollicus Brevis
2. Extensor Carpi Radialis Brevis AND Longus

Question 6

What tendons are in compartment 3 and compartment 4?

Answer 6

3. Extensor Pollicus Longus
4. Extensor Digitorum and Extensor Indicis

Question 7

What tendons are in compartment 5 and compartment 6?

Answer 7

5. Extensor Digiti Minimi
6. Extensor Carpi Ulnaris

Question 8

What is the muscle action of Palmar Interossei

Also, is the Palmar Interossei UNIPENNATE or BIPENNATE

Answer 8

Adduct the 2nd, 4th, and 5th digit towards the axial line

Assists Lumbercles with FLEXING the metacarpophalangeal joints while EXTENDING the interphalangeal joints

UNIPENNATE

Question 9

What is the proximal attachment of the Palmar Interossei

Answer 9

Palmar surfaces of 2nd, 4th, and 5th metacarpals

AS UNIPENNATE

Question 10

What is the distal attachment of the palmar interossei

Answer 10

Base of proximal Phalanges, Extensor expansion of digit 2, 4 and 5

Question 11

What is the innervation of Palmar Interossei AND the Dorsal Interossei

Answer 11

deep branch of Ulnar Nerve c8 t1

Question 12

The Palmar Interossei acts to _____ whereas the dorsal interossei acts to _____

Answer 12

Palmar: Adduct

Dorsal: Abduct

remember: PAD DAB

Question 13

What is the muscle action of the Dorsal Interossei muscle?

Answer 13

Abduct the 2nd, 4th, and 5th digit away from the axial line.

Also acts with the lumbricles to flex the metacarpophalangeal joints while extending the Interphalangeal joints <- same as palmar interossei

Question 14

What is the proximal attachment of the Dorsal interossei

Answer 14

Adjacent side of two metacarpals as a Bipennate muscle

Question 15

What is the distal attachment of the Dorsal Interossei Muscle?

Answer 15

Bases of proximal phalanges AND

extensor expansions of 2nd–4th digits

Question 16

What is the muscle action of the Lumbricals of the hand?

Answer 16

Flex the metacarpophalangeal joints

AND

extending the interphalageal joints

Question 17

What is the proximal attachment of the lumbricals of the hand?

Answer 17

1 and 2: UNIPENNATE to the LATERAL two tendons of the flexor digitorum profundus

3 and 4: BIPENNATE to the MEDIAL 3 tendons of the flexor digitorum profundus

Question 18

Identify as Unipennate or Bipennate:

Dorsal Interossei

Palmar Interossei

Lumbricles

Answer 18

Dorsal: Bipennate

Palmar: Unipennate

Lumbricles: 1 and 2 Uni

3 and 4 Bi

Question 19

What is the distal attachment of the lumbricals?

Answer 19

Radial side of extensor expansions of 2nd–5th
digits

Question 20

What is the innervation of the lumbricals (hint 2)

Answer 20

1 and 2: Digital of median nerve C8 T1

3 and 4: Deep branch of Ulnar Nerve C8 T1

Question 21

Identify this muscle

Answer 21

Palmar Interossei

Question 22

What is Dupuytren’s Contracture

Answer 22

Abnormal thickening of Palmar Aponeurosis, leads to contracture of 4th and 5th digi t

Question 23

What are two functions of synovial sheaths?

Answer 23

Reduce friction during movement

lubricate tendons

Question 24

What two structures pass through Guyons Canal in the

Answer 24

Ulnar Artery

Ulnar Nerve