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a & p > Nervous System > Flashcards

Nervous System Flashcards

0
Q

Myotomes of brachial plexus

A

C5 - shoulder
C6 - elbow
C7 - wrist
C8 & T1 - fingers

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1
Q

Brachial plexus

A

Innervation of the upper limb
C5-T1
Nerves = musculocutaneous, axillary, median, radial, ulnar

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2
Q

Myotomes of lumbar plexus

A

L3 - hip

L4 - knee

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3
Q

Myotomes of sacral plexus

A

L5 & S1 - ankle

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4
Q

Rhyme for reflexes

A

S1-S2 buckle my shoe (Achilles tendon test)
L3-L4 kick the door (patellar tendon test)
C5-C6 pick up sticks (biceps brachii tendon test)
C7-C8 lay them straight (triceps brachii tendon test)

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5
Q

A patient presents with weakness in the hand and loss of sensation on the front surface of the Palm on the ulnar side. Muscular testing reveals an inability to firmly hold a piece of paper between the fingers and a weak grip, especially on the ulnar side. The most likely cause would be a lesion to:

a) C8 and T1 spinal levels
b) musculocutaneous nerve at the elbow
c) ulnar nerve at the carpal tunnel
d) ulnar nerve in Guyon’s tunnel
e) ulnar nerve in the Cubital tunnel

A

e) ulnar nerve in the Cubital tunnel

Since Flexion of the fingers is caused by innervating muscles in the forearm, the lesion has to be at the elbow
Ulnar nerve provides motor and sensory to the ulnar side of forearm and hand

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6
Q

Musculocutaneous nerve

A

Innervates muscles of the arm

Superficial cutaneous distribution of forearm

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7
Q

Median nerve

A

Innervates muscles of the forearm - except flexor digitorium profundus
Superficial cutaneous distribution to medial of hand

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8
Q

Ulnar nerve

A

Innervates the flexor digitorum profundus muscle

Superficial cutaneous distribution to the pinky and third finger

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10
Q

deltoid (anterior fibers)

A

flexion & medial rotation

axillary nerve

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11
Q

deltoid (middle fibers)

A

abduction

axillary nerve

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12
Q

deltoid (posterior fibers)

A

extension & lateral rotation

axillary nerve

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13
Q

supraspinatus

A

abduction

suprascapular nerve

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14
Q

infraspinatus

A

lateral rotation

suprascapular nerve

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15
Q

teres minor

A

extension & lateral rotation

axillary nerve

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16
Q

subscapularis

A

medial rotation

subscapular nerve

17
Q

biceps

A

flexion

musculocutaneous nerve

18
Q

triceps

A

extension

radial nerve

19
Q

thenar group

A

thumb movement

median nerve

20
Q

lumbricals

A

finger abduction

median & ulnar nerves

21
Q

hypothenar group

A

pinky movement

ulnar nerve

22
Q

psoas

A

trunk flexion

L1-L4

23
Q

iliacus

A 
thigh flexion
femoral nerve (L2-L3)
24
Q

gluteus maximus

A

extension & lateral rotation of hip

inferior gluteal nerve

25
Q

tensor fascia lata

A

thigh abduction & internal rotation

superior gluteal nerve

26
Q

deep external rotators (piriformis, obturator internus, superior & inferior gernelli)

A

hip abduction/adduction & external rotation

L5-S1

27
Q

quadriceps

A

knee extension

femoral nerve

28
Q

sartorius

A

thigh flexion, abduction & rotation

femoral nerve

29
Q

adductor group (adductor magnus, gracilis)

A

thigh adduction

obturator nerve

30
Q

popliteus

A

knee flexion & medial rotation

tibial nerve

31
Q

gastrocnemius & soleus

A

plantar flexion

tibial nerve

32
Q

tibialis posterior

A

plantar flexion & inversion

tibial nerve

33
Q

flexor digitorum

A

plantar flexion & toe flexion

tibial nerve

34
Q

tibialis anterior

A

dorsiflexion & inversion

fibular nerve

35
Q

extensor digitorum

A

dorsiflexion & toe extension

fibular nerve

36
Q

fibular group

A

dorsiflexion & eversion

fibular nerve

37
Q

flexor digitorum brevis

A

toe flexion

tibial nerve

38
Q

extensor digitorum brevis

A

toe extension

fibular nerve

39
Q

a patient eperiences loss of sensation in a stripe of skin along the medial aspect of the arm and forearm. This is accompanied by paresis of the finger adductors. The lesion would most likely be located in the:

a) lower roots of the brachial plexus
b) ulnar nerve
c) median nerve
d) posterior divisions of the brachial plexus
e) upper roots of the brachial plexus

A

a) lower roots of the brachial plexus

a & p (8 decks)

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