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anatomie part deux > Anterior Forearm - lectures > Flashcards

Anterior Forearm - lectures Flashcards

1
Q

blood supply to anterior forearm

A
  • ulnar a.

- anterior interosseous a.

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2
Q

blood supply to posterior forearm

A
  • radial a.
  • recurrent interosseous a.
  • posterior interosseous a.
  • ulnar a.
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3
Q

blood supply to anterior hand

A

superficial palmar arch (ulnar a.)

deep palmar arch (radial a.)

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4
Q

common head of flexors of forearm

A

medial epicondyle

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5
Q

superficial muscles of ant. forearm

A

pronator teres
palmaris longs
flexor carpi radialis
flexor capri ulnaris

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6
Q

intermediate muscles of ant. forearm

A

flexor digitorum superficialis

  • radial head
  • humeral-ulnar head
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7
Q

deep muscles of ant. forearm

A
  • flexor pollicis longus
  • flexor digitorum profundus
  • pronator quadratus
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8
Q

pronator teres ABI and clinical relevance

A 
medial nerve goes through there and can become trapped - pronator syndrome
A: pronates and flexes forearm at elbow
B: Anterior ulnar recurrent artery 
(pronator teres m. has an aura!!!)
I: Median nerve (C6, C7)
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9
Q

flexor carpi radialis ABI

A

A: flexes and abducts hand at wrist
B: ulnar artery
I: median nerve (C6, C7)

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10
Q

palmaris longus ABI

A

A: flexes hand at wrist, tenses palmar aponeurosis
B: ulnar artery
I: median nerve (C6, C7,C8)
bigger muscle, longer - think of it as needing more innervation

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11
Q

flexor carpi ulnaris ABI

A

A: flexes and adducts hand at wrist
B: ulnar artery
I: ulnar nerve (C7, C8)

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12
Q

Why is adduction of hand easier to do than abduction

A

no styloid process of radius blocking that adducting side!

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13
Q

ulnar nerve becoming compressed in tendonous arch formed by humeral and ulnar heads of flexor carpi ulnaris in region of elbow can lead to …
s/s?

A

cubital tunnel syndrome!

s/s same as proximal ulnar n. lesion (numbness and tingling in medial part of palm and medial digits)

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14
Q

flexor digitorum superficialis ABI

A

A: flexes middle phalanges at proximal interphalangeal joint, flexes proximal phalanges at MCP joints
B: ulnar artery
I: median n. (C7, C8, T1)
[ going deeper, so needing lower spinal root innervation)

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15
Q

all ant. forearm muscles supplied by median nerve except 1.5 muscles
which muscles and nerve?

A

ulnar nerve!
flexor carpi ulnaris
ulnar part of flexor digitorum ulnaris

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16
Q

flexor digitorum profundus ABI

A

A: flexes distal phalanges at interphalangeal joints (power grip) = allows you to hold on to things using power tools, hammer etc.
B: anterior interosseous artery
I: median n. (ant. interosseus n. branch) AND ulnar nerves (C8, T1)

17
Q

flexor pollicis longus ABI

A

A: flexes thumb
B: ant. interosseous a.
I: median n. (ant. interosseus n. branch) C8, T1

18
Q

pronator quadratus ABI

A

A: pronates forearm, deep fibers bind radius and ulna together
B: anterior interosseous a.
I: median n. (ant. interosseus n. branch) C8, T1

19
Q

anatomical relationships of anterior forearm from lateral to medial

A

NANAN!!

  • radial n. (superficial branch)
  • radial a.
  • median n.
  • ulnar a.
  • ulnar n.
20
Q

ulnar nerve path from arm to hand

A
  • posterior to medial epicondyle
  • along forearm under FCU
  • through Guyon’s canal lateral to pisiform bone (medial edge of wrist)
  • enters hand and supplies most of intrinsic muscles of the hand
21
Q

what keeps anterior forearm muscle tendons from popping up at the wrist?

A

flexor retinaculum!

22
Q

ulnar a. relationship to FCU and hand

A

located right under FCU or just lateral to it

- travels via guyon’s canal as well, follows alongside ulnar n.

23
Q

median n. path from hand to forearm (branches)

A
  • median n. to pronator teres = runs through it
  • median n. to FDS = deep to it (between FDS and FDP)
  • median n. to flexor retinaculum = deep to it (through carpal tunnel)
24
Q

radial a. to brachioradialis m.

A

under brachioradialis or just medial to it

25
Q

whats running underneath pronator quadratus

A
  • anterior interosseous n.

- artery to pronator quadratus

26
Q

broken arm, cant make fist, hand and wrist hyperextended, unable to flex 4th and 5th digit.
what part of arm fractured? which nerve?

A

humeral medial epicondyle

ulnar nerve

anatomie part deux (11 decks)

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