Nervous System

Question 1

Branches of Peripheral Nervous System

Answer 1

Somatic, Autonomic

Question 2

What kind of nerves are contained in the Somatic nervous system

Answer 2

Peripheral

Question 3

Where is the border between the CNS and PNS

Answer 3

The most superficial layer of the spinal cord (Spinal cord stops at around L2)

Question 4

Name of area where spinal cord stops

Answer 4

Conus Medullaris

Question 5

Base unit of the CNS and PNS

Answer 5

Neurons

Question 6

Components of Neurons

Answer 6

Cell Body (grey matter), Axon, Myelin sheaths (white matter)

Question 7

Part of the PNS under conscious control

Answer 7

Somatic

Question 8

Another name for motor neurons

Answer 8

Efferent

Question 9

Another name for sensory neurons

Answer 9

Afferent

Question 10

Location of efferent neuron cell bodies

Answer 10

Ventral horn of spinal cord

Question 11

Location of afferent neuron cell bodies

Answer 11

dorsal root ganglion

Question 12

layer that surrounds a fascicle of nerves

Answer 12

perineurium

Question 13

Motor Unit

Answer 13

a single nerve + all the muscle fibres it innervates

Question 14

How many pairs of spinal nerves (in each section)

Answer 14

31 total (8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal)

Question 15

what area does the dorsal ramus supply

Answer 15

local posterior muscle + skin (dermatomes)

Question 16

what areas do the ventral rami supply

Answer 16

plexuses (limbs)

Question 17

Where does a ramus form

Answer 17

intervertebral foramen

Question 18

Neurons that connect sensory and motor neurons

Answer 18

interneurons

Question 19

what is a plexus

Answer 19

an intertwining network of nerves that give rise to peripheral nerves that supply structures of the arm/leg

Question 20

Largest nerve in the lumbosacral plexus

Answer 20

sciatic

Question 21

Lateral femoral cutaneous nerve source

Answer 21

L2,L3

Question 22

Femoral Nerve source/target

Answer 22

L2-L4 (posterior)/anterior hip and thigh (hip flexors, knee extensors)

Question 23

Obturator nerve source/target

Answer 23

L2-L4 (anterior)/medial thigh (hip adductors)

Question 24

Accessory Obturator

Answer 24

L3,L4 (not everyone has one)

Question 25

what is the saphenous nerve

Answer 25

a terminal cutaneous branch of the femoral nerve

Question 26

what is paraesthesia (another word)

Answer 26

numbness

Question 27

Lumbar Plexus Area

Answer 27

T12-L4

Question 28

Sacral Plexus Area

Answer 28

L4-S4

Question 29

sciatic nerve source/target

Answer 29

L4-S3/posterior thigh (hip extensors, knee flexors)

Question 30

posterior femoral cutaneous nerve source

Answer 30

S1-S3

Question 31

Pudendal nerve source

Answer 31

S2-S4

Question 32

Superior Glutaeal Nerve source

Answer 32

L4-S1

Question 33

inferior gluteal nerve source

Answer 33

L5-S2

Question 34

what is a dermatome

Answer 34

unilateral area of skin supplied by a single spinal nerve

Question 35

Nerves of Sacral Plexus

Answer 35

Sciatic, Posterior Femoral Cutaneous, Pudendal, Superior/Inferior Gluteal

Question 36

Nerves of Sacral Plexus

Answer 36

Sciatic, Posterior Femoral Cutaneous, Pudendal, Superior/Inferior Gluteal

Question 37

Nerves of Lumbar Plexus

Answer 37

Lateral Femoral Cutaneous, Femoral, Obturator, Accessory Obturator

Question 38

What/where is the lumbosacral trunk

Answer 38

Nerves of lumbar spine that help make up sacral plexus (L4-L5)