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Flashcards in Nerve + Muscles Test 1 Deck (32)
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1
Q

Second most common postop peripheral neuropathy

A

Brachial plexus

2
Q

Injured when arm abduction > 90 or improperly placed shoulder brace

A

Brachial plexus

3
Q

Axillary innervates

A

deltoid and teres minor

4
Q

Axillary injury causes

A

inability abduct arm

5
Q

Musculocutaneous sends fibers to the

A

biceps brachii and brachialis ; ‘most superior nerve of brachial plexus’

6
Q

Musculocutaneous Injury

A

inability to flex forearm

7
Q

Median innervation

A

branches to most of the flexor muscles of wrist and fingers (also opponens pollicis)

8
Q

Median injury

A
Pronation of forearm
Flexion of wrist 
Opposition of thumb 
Flexion of lateral three fingers
Injury-> Ape hand- “unable to oppose thumb”
9
Q

Ulnar – supplies

A

the flexor carpi ulnaris and part of the flexor digitorum profundus

10
Q

Ulnar injury

A
Most common postop peripheral neuropathy
Flexion of wrist 
Adduction of fingers 
Flexion of medial two fingers (4,5)
Injury-> Claw hand
11
Q

Radial innervates

A

innervates essentially ALL extensor muscles of arm and forearm

12
Q

Radial injury

A

Extension at elbow
Supination of forearm
Extension of wrist and fingers
Injury-> Wrist drop

13
Q

Intercostobrachial nerve

A

Can be blocked to reduce pain from tourniquet inflation during IV regional neural anesthesia

14
Q

___________ ______ provides innervation to lower limb

A

Lumbosacral plexus

15
Q

Lumber plexus is formed by ventral rami of ___ -___. Occasional contribution of ___.

A

L1- L4, T12

16
Q

Lumbosacral plexus Lies in ______muscle

A

psoas

17
Q

Lumbosacral plexus Consists of three major nerves

A
Femoral nerve (L2-L4)
Lateral femoral cutaneous  nerve (L1- L3)
Obturator nerve (L2- L4)
18
Q

femoral nerve consists of __-__?

A

Femoral nerve (L2-L4)

19
Q

Lateral femoral cutaneous nerve consists of __-__?

A

Lateral femoral cutaneous nerve (L1- L3)

20
Q

Obturator nerve consists of __-__?

A

Obturator nerve (L2- L4)

21
Q

Provides motor and sensory innervation to __________and sensory innervation to ________

A

anterior thigh, medial leg

22
Q

Sacral plexus arise from ___-__ and __- __

A

L4-L5 and S1- S4

23
Q

Posterior thigh and most of leg and foot are supplied by the _______ and ______.

A

tibial and common peroneal nerves (branches of sciatic nerve)

24
Q

_____________ nerve provides sensory innervation to posterior thigh

A

Posterior femoral cutaneous

25
Q

Femoral nerve supplies

A

Hip flexors
Knee extensors – Quads
Sensory innervation to hip and thigh

26
Q

Saphenous nerve is the most medial branch of femoral nerve innervates

A

Skin of medial leg

Ankle joint

27
Q

Sciatic Nerve injury caused by

A

Compression under piriformis

Improper lithotomy position

28
Q

Sciatic Nerve injury

A

Weakness (below knee) and loss of sensation

29
Q

Most frequent injury of lower limb

A

Common peroneal (fibular) Nerve

30
Q

Common peroneal (fibular) Nerve injury

A

Injury = Foot drop

31
Q

Tibial Nerve injury

A

Injury = Foot drop

32
Q

Femoral Nerve injury

A

Injured by self retaining retractor

Absent knee reflex