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KN 251 Unit 3 > Plexuses > Flashcards

Plexuses Flashcards

1
Q

Means braid, a briad or intermingling of several spinal nerves

A

Plexus

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2
Q

A network of nerves supplying the UE (arm)

A

Brachial Plexus

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3
Q

Which ventral rami form brachial plexus

A

C5,6,7,8,T1 spinal nerves

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4
Q

RTDCB

Robert Taylor Drinks Cold Beer

A 
Rami
Trunks
Divisions
Cords
Branches
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5
Q

Where are the rami that form the brachial plexus located?

A

Neck, superior to the clavicle

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6
Q

Distal to the rami trunks are formed..

Upper trunk is formed by
Middle trunk is formed by
Lower trunk is formed by

A

C5 and C6

C7

C8 and T1

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7
Q

Each trunk divides into two divisions, name them

A

Anterior and Posterior Divisions

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8
Q

What does the anterior division of brachial plexus supply?

What about the posterior division?

A

Flexor/Anterior compartment of the arm

Extensor/posterior compartment of the arm

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9
Q

Distal to the divisions, 3 cords are formed. Name them

A

Lateral Cord
Medial Cord
Posterior Cord

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10
Q

This cord is from the anterior division of the upper and middle trunks

A

Lateral Cord

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11
Q

This cord is from the anterior division of the lower trunk

A

Medial Cord

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12
Q

This cord is from the posterior divisions of all 3 trunks

A

Posterior Cord

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13
Q

The cords of the brachial plexus are related to the

A

Axillary Artery

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14
Q

The medial cord lies __ to the artery
The lateral cord lies ___ to the artery
The posterior cord lies ___ to the artery

A

Medial
Lateral
Posterior

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15
Q

Which nerves does the posterior cord form?

A

Axillary and Radial Nerve

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16
Q

Which nerves does the lateral cord form?

A

Musculocutaneous and median

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17
Q

Which nerves does the medial cord form?

A

Ulnar and median

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18
Q

The most laterally placed nerve on the M of the brachial plexus

The most medially placed nerve on the M of the brachial plexus

What runs down the middle?

A

Musculotcutaneous nerve

Ulnar Nerve

Median nerve

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19
Q

What muscles does the axillary nerve supply?

A

Deltoid and teres minor

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20
Q

What muscles does the radial nerve supply?

A

Posterior Arm and Posterior Forearm

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21
Q

The musculocutaneous nerve pierces the corachobrachialis and supplies what muscles?

A

Anterior muscles of the arm

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22
Q

The median nerve supplies which muscles?

A

Anterior forearm muscles

Lateral and Deep muscles of the hand

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23
Q

What muscles does the ulnar nerve supply?

A

Anterior muscles of the forearm

Medial muscles of the hand

24
Q

Injury to the MC nerve would cause weakening of what actions?

A

Forearm Flexion and Supination

25
Q

A fraction of the humerus typically leads to an injury to the radial nerve. What actions would weaken?

A

Wrist extension (Wrist Drop)

Extension of the forearm

26
Q

Injury to the median nerve would weaken what actions?

A

Flexion of 2nd and 3rd fingers

27
Q

Injury to the ulnar nerves weakens what actions?

A

Loss of hand muscles except thenar group

28
Q

Which plexus supplies the lower limbs?

A

Lumbosacral plexus

29
Q

Which spinal nerves does the lumbosacral plexus comprise?

A

L1-5, S1-4

30
Q

What part of the body does the lumbar plexus formed from L1-L5 supply?

A

Anterior and Medial thigh

31
Q

What muscle of the body does the lumbar plexus formed from L1-3 supply?

A

Psoas Major, before specific nerve is formed

32
Q

What muscle and part of the body does the femoral nerve L2-4 supply?

A

Iliacus (hip)

Anterior Thigh

33
Q

What part of the body does obturator nerve L2-4 supply?

A

Medial Thigh

34
Q

Ventral rami of L2-4 unite to form two nerves

A

Femoral nerve and obturator nerve

35
Q

NAVEL in the femoral triangle (lateral to medial)

A

Nerve artery vein

36
Q

obturator nerve splits into two, femoral does not

A

!

37
Q

Formation of the sacral plexus is by the lumbosacral trunk and ventral rami, which nerves do these correspond to?

A

Lumbosacral trunk - L4,5

Sacral Ventral Rami S1-4

38
Q

Sciatic nerve is formed by lumbosacral trunk and which sacral nerves?

A

S1,2,3

39
Q

The longest and thickest nerve in the body is

A

Sciatic nerve

40
Q

What does the sciatic nerve supply?

A

Lower limb except anterior and medial thigh

41
Q

What nerves does the sciatic nerve split off to make?

A

Common fibular nerve

tibial nerve

42
Q

The larger component of the sciatic nerve, it supplies most of the hamstring and the posterior leg;

A

Tibial Nerve

43
Q

What muscles of the leg does the tibial nerve supply?

A

The posterior muscles of the leg

Muscles of the foot

44
Q

What does the tibial nerve divide into?

A

Medial and Lateral Plantar Nerve

45
Q

The smaller, lateral division of the sciatic nerve and is superficial to the lateral compartment of the leg and divides into superficial and deep branches

A

Common Fibular Nerve

46
Q

Branch of sacral plexus that supplies the gluteus medius and minimus, and tensor facia latae

A

Superior Gluteal Nerve

47
Q

Branch of the sacral plexus that supplies the gluteus maximus

A

Inferior Gluteal Nerve

48
Q

Branch of the sacral plexus that supplies the muscles and skin of the perineum (rea between thighs from coccyx to pubis)

A

Pudendal Nerve

49
Q

Branches of the sacral plexus also supply lateral rotators of the thigh, which spinal nerves?
-piriformis, quadratus femoris, inferior/superior gamellae

A

L5,S1, S2

50
Q

An injury to the femoral nerve would cause a loss of what action?

A

Leg extension (strong)

51
Q

Injury to the obturator nerve would cause loss of what action?

A

Adduction of the thigh

52
Q

Injury to the tibial nerve would cause the loss of what actions?

A

Plantar Flexion (strong), Inversion, Extension of thigh (weak)

53
Q

Injury to the superficial fibular would cause the loss of what action?

A

Eversion

54
Q

Injury to the deep fibular nerve would cause the loss of what action?

A

Dorsiflexion, inversion of the foot (weak)

55
Q

A rupture of the annulus fibrosus allowing the protusion of the nucleus pulposus

Pushes on the nerve root exiting from the cord

A

Herniated Disc

56
Q

Which region is herniated discs common?

A

Lumbar region sciatic nerve and its components are affected

-area subjected to weight bearing activity

57
Q

Do all peripheral nerves(radial/tibial) carry both motor and sensory information?

A

Yes

KN 251 Unit 3 (11 decks)

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