Brachial Plexus Flashcards Preview

SHB Exam 1 > Brachial Plexus > Flashcards

Flashcards in Brachial Plexus Deck (8)
Loading flashcards...
1

Cause & effect of true claw:

Cause: Damage to lower roots --> damage to median, radial, and ulnar nerves
Effect: Inability to extend digits

2

Cause & effect of ulnar claw:

Cause: Distal ulnar nerve injury
Effect: Paralysis of the 2 medial lumbricals. May cause thenar wasting due to loss of adductor pollicis.

3

Cause & effect of Pope's blessing or Benedictine sign:

Cause: Median nerve injury
Effect: Paralyzes the lateral 2 lumbricals and weakens the flexor digitorum superficialis and deep.
Appears the same as ulnar claw but only upon attempting to make a fist.

4

Klumpke's palsy: what is it? How can it come about?

- Damage to the lower roots affects the ulnar, median, and radial nerves--affecting all lumbricals and weakening extension of the digits.
- Can occur thru sudden jerking of a child's arm or grabbing branch while falling from a tree.

5

Erb's palsy: what is it? How can it come about?

- A result of upper root damage and affects the suprascapular, musculocutaneous, and axillary nerves. The deltoid, brachialis, biceps, supraspinatus, and infraspinatus muscles may be affected contributing to the "waiter's tip" sign.

6

Dystocia definition. Which palsy's can it lead to?

- Difficult birth, typically caused by a large or awkwardly positioned fetus, by smallness of the maternal pelvis, or by failure of the uterus and cervix to contract and expand normally.
- Can lead to Klumpke's or Erb's palsy.

7

Dermatome (simple definition)

Sensory band served by 1 dorsal root

8

Cutaneous nerves (simple definition)

May come from several dorsal roots; innervate larger patch of skin than dermatome