A/p Quiz Over Spinal Nerves

Front 1

How many pairs of spinal nerves do we have?

Back 1

31

Front 2

spinal nerves emerge from both sides of the spinal cord through the

Back 2

intervertebral foramina

Front 3

intervertebral foramina are named for the

Back 3

vertebral region/level theyemerge

Front 4

Posterior root ganglia

Back 4

this is where the sensory neuron cell bodies are located

Front 5

fascicle

Back 5

bundle of axons

Front 6

spinal nerve

Back 6

bundle of fasicles

Front 7

Three protective coverings

Back 7

Epineurium-surrounds the whole nerve

Perineurium- encases each fascicle

Endoneurium- covers the myelinated/unmyelinated axons

Front 8

Rami

Back 8

branches of spinal nerves

Front 9

Posterior (dorsal) ramus

Back 9

innervates the skin and deep muscles of the back/trunk

Front 10

Anterior (ventral) ramus

Back 10

supplies the muscles and skin of all four limbs; anterior and lateral parts of the body

Front 11

Rami Communicantes

Back 11

connects the sympathetic ganglion (Autonomic NS) to the with the rest of the nervous system

Front 12

Meningeal branch

Back 12

innervates with the meninges, blood vessels, vertibones, D ligament in vertebral canal

Front 13

Plexus

Back 13

braided network of many spinal nerves joining before they innervate the body structures

Front 14

The plexus is located in what four regions of the body?

Back 14

cervical, brachial, lumbar, sacral

Front 15

How many spinal nerves are in each of these categories? Cervical, Thoracic, Lumbar, sacral, Coccygeal

Back 15

cervical=8

Thoracic=12

lumbar=5

sacral=5

coccygeal=1

Front 16

Thoracic does not have

Back 16

a plexus

Front 17

Cervical plexus

Back 17

formed c1-C5

Front 18

the cervical plexus is outside the

Back 18

anterior ventral ramus

Front 19

the phrenic nerve

Back 19

formed from c3-c5

moves down through the thoracic cavity to the diaphragm

it also sends signals to the diaphragm to contract/inflate the lungs

Front 20

axillary

Back 20

goes to the axillary region

Front 21

musculocutaneuos

Back 21

integrates with the skin

Front 22

brachial plexus

Back 22

c5-t1

formed by the shoulders and the upper limbs

Front 23

the radial is on the

Back 23

lateral side

Front 24

the ulnar is on the

Back 24

medial side

Front 25

median

Back 25

goes down the middle of the line

Front 26

sacral plexus

Back 26

l4-s4

innervates with the buttocks and most of the lower limbs

Front 27

tibial

Back 27

medial side of the leg

Front 28

common fibular

Back 28

lateral side of the leg

Front 29

sciatic

Back 29

formed by tibial and the common fibular nerve

Front 30

reflexes arc

Back 30

a neural pathway that controls an action reflex

Front 31

the reflex arc allows

Back 31

the reflex action to occur without having to route the signals through the brain

Front 32

What are the two types of reflex arcs?

Back 32

1. Somatic reflex- contraction of skeletal muscle

2.Autonomic (visceral reflex)- cardiac muscle, smooth muscle, or glands

Front 33

The spinal reflexes goes to the

Back 33

spinal nerves

Front 34

the cranial reflexes go to the

Back 34

goes to the cranial nerves

Front 35

5 components of a spinal reflex arc

Back 35

1. sensory receptor

2.sensory neuron

3.integrating center

4.motor neuron

5.effector

Front 36

A monosynaptic reflex

Back 36

has a single synapse between the afferent and efferent neurons it also does NOT have an interneuron

Front 37

A polysynaptic reflex has

Back 37

two or more synapses it DOES has an interneuron

Front 38

Sensory receptor

Back 38

responds to a stimulus by producing a generator or receptor potential

Front 39

Sensory neuron

Back 39

axon that conducts impulses from receptor to the integrating center

Front 40

Integrating center

Back 40

one or more regions within the central nervous system that relays impulses from sensory to motor neruons

Front 41

Motor neuron

Back 41

axon that conducts impulses from the integrating center to the effector

Front 42

effector

Back 42

a muscle or gland that responds to motor nerve impulses

Front 43

ipsilateral

Back 43

reflex arcs that involve sensory receptors, sensory nerve fibers, motor neurons, and effectors all on the SAME side of the body

Front 44

Contralateral

Back 44

Reflex arcs that involve sensory receptors and neurons on one side of the body and motor neurons and effectors on the OPPOSITE side of the body

Front 45

Bilateral

Back 45

Reflexes that involve BOTH sides of the body simultaneously

Front 46

What are the processes the body goes through when you stretch?

Back 46

1.. stretching stimulates the sensory receptors (muscle spindle)

2.sensory neuron- excited

3.within the integrating center (spinal cord) the

4. motor neuron-excited

5.sensory neuron activates the motor neuron

effector-(same muscle) contracts and relives the stretching