Chapter 16 Part 2

Question 1

4 types of plexuses

Answer 1

1.cervical 2.brachial 3.lumbar 4. Sacral

Question 2

Formed by anterior rami of C1-C5

Answer 2

Cervical plexus

Question 3

Innervates diaphragm & is formed by C3,C4 &C5

Answer 3

Phrenic nerve (cervical plexus)

Question 4

Formed by anterior rami of C5-C8 & T1 supplies upper Limbs

Answer 4

Brachial plexus

Question 5

5 main nerves of brachial plexus

Answer 5

1. Axillary
2. Musculocutaneous
3. Radial
4. Median
5. Ulnar

Question 6

_____ nerve injury may result in the inability to pronate forearm

Answer 6

Median nerve

Question 7

____ nerve injury may result in wrist drop; inability to extend wrist and fingers

Answer 7

Radial nerve

Question 8

Formed by anterior rami of L1-L4 -supplies lower limbs

Answer 8

Lumbar plexus

Question 9

Main nerves of lumbar plexus

Answer 9

1. femoral

2. obturator

Question 10

Formed by anterior rami of L4-L5 & S1-S4

-supplies lower limbs

Answer 10

Sacral plexus

Question 11

Sciatic nerve consists of 2 portions

Answer 11

A.tibial

B. Common peroneal

Question 12

____ nerve injury may result in sciatic pain from buttocks down to posterior thigh and leg

Answer 12

Sciatic nerve

Question 13

Damage to only ____________ may result in foot drop; inability to dorsiflex

Answer 13

Common peroneal portion

Question 14

Inability to dorsiflex

Answer 14

Foot drop

Question 15

Used to withdraw CSF ,inject antibiotics or anethetics

Answer 15

Spinal Tap columbar punctures

Question 16

Needle inserted into _____ space at 14 or below in adult

Answer 16

Subarachnoid

Question 17

Area of skin providing sensory input to CNS by spinal nerves or trigeminal nerve

Answer 17

Dermatome

Question 18

All spinal nerves assigned a dermatome except

Answer 18

C1

Question 19

Infection of PNS caused by herpes zoster virus, also causes chicken-pox

Answer 19

Shingles

Question 20

Contains both sensory and motor tract

Answer 20

White matter

Question 21

Name of tract indicates ____ in white matter and where it begins and ends in CNS

Answer 21

Column location

Question 22

• begins in brain
• ends in cord
• motor tract
• located in anterior column of white matter

Answer 22

Anterior corticospinal tract

Question 23

Receptors that control muscle tone (contraction) by monitoring muscle length changes

Answer 23

Muscle spindles

Question 24

Receptors that monitor tension (stretching) in tendons and muscles

Answer 24

Tendon organs

Question 25

Automatic,sudden,involuntary response to stimulus

Answer 25

Reflex

Question 26

Are integrated (processed) in brain stem

Answer 26

Crainal reflexes

Question 27

Are intergraded in spinal cord

Answer 27

Spinal reflexes

Question 28

Reflexes are

Answer 28

Nerve impulse pathway

Question 29

5 steps (reflexes)

Answer 29

1. sensory receptor 2. sensory neuron 3. integrating center 4. motor neuron 5. effector responds

Question 30

Responds to stimulus

Answer 30

Sensory receptor

Question 31

Carries impulse to CNS

Answer 31

Sensory Neuron

Question 32

Processes stimulus in CNS either 2 ways

Answer 32

Integrating center

Question 33

Carried impulse from CNS

Answer 33

Motor neuron

Question 34

Skeletal muscles (somatic) or smooth, cardiac muscles and glands (automatic)

Answer 34

Effector responds

Question 35

Monosynaptic 1. 2.

Answer 35

1. CNS synapse | 2. poly synaptic

Question 36

Spinal somatic reflexes 4 types

Answer 36

1. stretch 2. tendon 3. flexor 4. crossed extensor

Question 37

Muscle spindle receptors monitor muscle length changes -antagonist muscle reflexes -mono synaptic

Answer 37

Stretch reflex

Question 38

Stimulates muscle contraction in response to a stretched muscle

Answer 38

Knee jerk reflex

Question 39

Impulses enter and exit same side of spinal cord

Answer 39

Ipsilateral

Question 40

- Golgi tendon organ monitors tension in tendons and muscles - during leg flex ion quadriceps muscle relaxes protecting tendon and muscle from excessive tention

Answer 40

Tendon reflex

Question 41

- permits antagonistic muscle to contract | - polysynaptic and ipsilateral

Answer 41

Tendon reflex

Question 42

Formed by anterior rami of all spinal nerves except T2-T12 (intercostal nerves)

Answer 42

Plexuses