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anatomy Unit 3 > Anterior Forearm > Flashcards

Anterior Forearm Flashcards

1
Q

what group of muscles in the anterior formarm crosses the elbow

A

superficial

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2
Q

does the superficial anterior forearm group act upon the elbow joint

A

no (not flexion or extension)

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3
Q

Most of the anterior forearm muscles are innervated by the

A

median nerve C6-T1

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4
Q

Ulnar nerve controls what in the anterior forearm

A
  1. FCU

2. (medial side) FDP

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5
Q

inflammation of common flexor origin and periosteum of the medial epicondyle

A

Medial epicondylitis (“Golfer’s elbow”):

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6
Q

common origin of the superficial flexors of the forearm

A

♣ Medial Epicondyle of the Humerus

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7
Q

pronator teres insertion

A

mid shaft of the radius

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8
Q

Flexor carpi radialis insertion

A

radial (lateral) side of hand

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9
Q

Flexor carpi ulnaris insertion

A

ulnar (medial) side of hand

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10
Q

Palmaris longus insertion

A

palmar aponeurosis

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11
Q

what muscle is absent in 15%

A

Palmaris longus

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12
Q

Flexor digitorum superficialis (FDSF) insertion

A

middle phalanges of digits 2-5

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13
Q

Flexor digitorum superficialis (FDSF) actions

A

flex digits 2-5 (MCP and PIP joints), flex wrist joint

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14
Q

Flexor digitorum profundus (FDP)

insertion

A

distal phalanges of digits 2-5

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15
Q

Flexor digitorum profundus (FDP) action

A

flex digits 2-5 (MCP, PIP, and DIP joints), flex wrist joint

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16
Q

Flexor digitorum profundus (FDP) innervation

A
  • Lateral (radial) ½ (to digits 2, 3) = median nerve

- Medial (ulnar) ½ (to digits 4, 5) = ulnar nerve

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17
Q

flex thumb (CMC, MCP and IP joints), flex wrist joint

A

Flexor pollicis longus

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18
Q

Pronator quadratus insertion

A

distal radius

19
Q

forms the roof of the carpal tunnel

A

The flexor retinaculum

20
Q

Contents of the carpal tunnel (4 items) 9 tendons 1 nerve

A

median nerve
tendons of flexor digitorum superficialis
tendons of flexor digitorum profundus
tendon of flexor pollicis longus

21
Q

Contains the 3 thenar muscles acting on the thumb

A

♣ Thenar compartment

22
Q

o Contains the adductor pollicis muscle

A

♣ Adductor compartment

23
Q

o Untreated infections of the (what) can spread through the carpal tunnel and into the anterior compartment of the forearm

A

central compartment

24
Q

Most of the intrinsic muscles are innervated by the

A

Ulnar nerve

25
Q

Innervation levels in the hand regardless of the nerve

A

C8-T1

26
Q

what nerve innervates the thenar eminence

A

recurrent branch of the median nerve

27
Q

♣ Hypothenar Muscles

A
  • Abductor digiti minimi
  • Flexor digiti minimi brevis
  • Opponens digiti minimi
28
Q

Lumbricals originate where

A

tendons of flexor digitorum profundus

29
Q

Lumbricals Insert where

A

extensor expansions of digits 2-5

30
Q

flex MCP joints and extend PIP & DIP joints of digits 2-5

A

(what is the action of the lumbricles)

31
Q

The lumbricals to digits 2 & 3 are innervated by the , (?) while lumbricals to digits 4 & 5 are innervated by the (?) nerve.

A
  • median

- Ulnar

32
Q

PAD how many

A

3

33
Q

DAB how many

A

4

34
Q

How less DAB vs PAD

A

can’t ADD digit 3

35
Q

Does NOT innervate

structures in the arm (what nerve)

A

median

36
Q

o Courses through the cubital fossa

what nerve

A

median

37
Q

Test: pad-to-pad opposition

Cutaneous sensation tip of digit 2

A

proximal median

38
Q

Can be compressed here (cubital tunnel syndrome)

A

ulnar nerve

39
Q

all interossi are innervated by what nerve

A

ulnar

40
Q

o Brachial artery gives rise to the ulnar and radial arteries in the

A

cubital fossa

41
Q

Give the beakdown of ulnar arteries

A

o Ulnar artery
recurrent arteries
• common interosseous artery, which divides into:
◊ Anterior interosseous
◊ Posterior interosseous artery
• superficial palmar arch which provides primary blood supply to the common and proper digital arteries
• Ulnar artery anastomoses with the radial artery via the superficial and deep palmar arches

42
Q

Passes into wrist superficial to flexor retinaculum

A

Ulnar artery

43
Q

Radial artery break down

A
  • Gives rise to radial recurrent artery (anastomoses around elbow)
  • Supplies anterior and posterior compartment muscles on the lateral aspect of the forearm
  • The pulse rate is usually measured on the radial artery at the wrist, where it lies lateral to the tendon of flexor carpi radialis
  • Gives rise to deep palmar arch which provides modest blood supply to the digital arteries (exception: main blood supply to the thumb)

anatomy Unit 3 (7 decks)

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