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Anatomy > Unit 12 Anterior Hand > Flashcards

Unit 12 Anterior Hand Flashcards

1
Q

What are the landmarks of the anterior hand?

A

Thenar eminence, hypothenar eminence

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2
Q

What is the Thenar eminence?

A

The swelling at the base of the thumb

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3
Q

What is the hypothenar eminence?

A

Swelling at the base of the little finger.

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4
Q

How is the deep fascia of the palm continuous with the antebrachial fascia?

A

Palmar carpal ligament

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5
Q

What are the three deep fascias of the hand?

A

Thenar, hypothenar, palmar aponeurosis

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6
Q

What three muscles originate on the lateral end of the flexor retinaculum?

A

Abductor pollicis brevis, opponens pollicis, flexor pollicis brevis

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7
Q

What innervates the three muscles that originate from the lateral end of the flexor retinaculum? What is their vascular supply?

A

All innervated by the recurrent branch of the medial nerve, all receive blood from the superficial palmar branch of the radial artery

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8
Q

Where is the insertion of the abductor pollicis brevis?

A

Lateral side of base of proximal phalanx

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9
Q

Where is the insertion of the opponens pollicis?

A

Along the shaft of first metacarpal

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10
Q

Where is the insertion of the flexor pollicis brevis?

A

Abductor pollicis brevis

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11
Q

Which three muscles have their origin on the medial portion of the flexor retinaculum?

A

Abductor digiti minimi (quinti), opponens digiti minimi (quinti), flexor digiti minimi brevis

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12
Q

What provides innervation to the three muscles originating from the medial portion of the flexor retinaculum? What supplies blood?

A

Deep branch of ulnar nerve, superficial and deep branches of the ulnar artery

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13
Q

Where does the abductor digiti minimi insert?

A

Medial side of base of proximal phalanx

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14
Q

Where does the opponens digiti minimi insert?

A

Medial side of entire 5th metacarpal

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15
Q

Where does the flexor digiti minimi brevis muscle insert?

A

With abductor minimi muscle

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16
Q

What is the origin of the four lumbrical muscles?

A

From tendons of flexor digitorum profundus, pass lateral to the digit they serve

17
Q

Where do the 4 lumbrical muscles insert?

A

Radial side of extensor tendons

18
Q

What is the action of the 4 lumbrical muscles?

A

Help flex metacarpophalangeal joints and extend interphalangeal joints

19
Q

What innervates the lumbricals?

A

Lateral two lumbricals innervated by median nerve and lateral two lumbricals innervated by the ulnar nerve

20
Q

What is the origin of the adductor pollicis muscle?

A

2nd, 3rd, and 4th metacarpal bones and oblique heads from capitate

21
Q

Where does the adductor pollicis insert?

A

Medial side of first phalanx of thumb

22
Q

What kind of muscles are the three palmar interosseous muscles?

A

Adductors

23
Q

What is the origin of the three palmar interosseous muscles?

A

Metacarpal bone

24
Q

What is the insertion of the three palmar interosseous muscles?

A

Base of proximal phalanx and base of extensor tendon acted upon

25
Q

What is the function of the four dorsal interosseous muscles?

A

Abduction

26
Q

What is the origin of the 4 dorsal interosseous muscles?

A

Adjacent metacarpals

27
Q

What is the insertion for the 4 dorsal interosseous muscles?

A

on base of proximal phalanx and extensor tendon

28
Q

What provides innervation for the adductor-interosseous muscles?

A

deep branch of the ulnar nerve

29
Q

What artery supplies the adductor-interosseous muscles?

A

deep palmar artery and branches

30
Q

What are the two synovial sheaths of the flexors of the hand?

A

ulnar bursa and radial bursa

31
Q

What are the two fascial clefts of the hand?

A

midpalmar cleft (medially), thenar cleft (laterally)

32
Q

What are the radial artery branches in the hand?

A
  1. princeps pollicis artery
  2. radialis indicis artery
  3. deep palmar arch - connection between deep radial and ulnar arteries
  4. palmar metacarpal arteries
  5. perforating and recurrent branches
33
Q

What are the ulnar arteries of the hand?

A
  1. deep branch
  2. superficial palmar arch
    3 common and proper palmar digital arteries
34
Q

From where do the palmar arteries arise? What do they become?

A

three common arise from the superficial palmar arch, divide into the proper palmar digital arteries

35
Q

What are the three branches of the median nerve in the hand?

A

palmar cutaneous, recurrent muscular, common and proper palmar digital nerves

36
Q

What are the three branches of the ulnar nerve in the hand?

A
  1. palmar cutaneous branch - given off in forearm
  2. superficial palmar branch - sensory to medial 1 1⁄2 fingers
  3. deep palmar branch - motor to all the muscles

Anatomy (16 decks)

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