Chapter 16 Part 2 Flashcards Preview

Anatomy > Chapter 16 Part 2 > Flashcards

Flashcards in Chapter 16 Part 2 Deck (42):
1

4 types of plexuses

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

2

Formed by anterior rami of C1-C5

Cervical plexus

3

Innervates diaphragm & is formed by C3,C4 &C5

Phrenic nerve (cervical plexus)

4

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

Brachial plexus

5

5 main nerves of brachial plexus

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

6

_____ nerve injury may result in the inability to pronate forearm

Median nerve

7

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

Radial nerve

8

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

Lumbar plexus

9

Main nerves of lumbar plexus

1.femoral
2.obturator

10

Formed by anterior rami of L4-L5 & S1-S4
-supplies lower limbs

Sacral plexus

11

Sciatic nerve consists of 2 portions

A.tibial
B. Common peroneal

12

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

Sciatic nerve

13

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

Common peroneal portion

14

Inability to dorsiflex

Foot drop

15

Used to withdraw CSF ,inject antibiotics or anethetics

Spinal Tap columbar punctures

16

Needle inserted into _____ space at 14 or below in adult

Subarachnoid

17

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

Dermatome

18

All spinal nerves assigned a dermatome except

C1

19

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

Shingles

20

Contains both sensory and motor tract

White matter

21

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

Column location

22

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

Anterior corticospinal tract

23

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

Muscle spindles

24

Receptors that monitor tension (stretching) in tendons and muscles

Tendon organs

25

Automatic,sudden,involuntary response to stimulus

Reflex

26

Are integrated (processed) in brain stem

Crainal reflexes

27

Are intergraded in spinal cord

Spinal reflexes

28

Reflexes are

Nerve impulse pathway

29

5 steps (reflexes)

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

30

Responds to stimulus

Sensory receptor

31

Carries impulse to CNS

Sensory Neuron

32

Processes stimulus in CNS either 2 ways

Integrating center

33

Carried impulse from CNS

Motor neuron

34

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

Effector responds

35

Monosynaptic
1.
2.

1.CNS synapse
2.poly synaptic

36

Spinal somatic reflexes 4 types

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

37

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

Stretch reflex

38

Stimulates muscle contraction in response to a stretched muscle

Knee jerk reflex

39

Impulses enter and exit same side of spinal cord

Ipsilateral

40

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

Tendon reflex

41

-permits antagonistic muscle to contract
-polysynaptic and ipsilateral

Tendon reflex

42

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

Plexuses