Nervous sytem: L2 Spinal Cord.

Question 1

What are the number of cervical nerves?

Answer 1

8

Question 2

What are the number of thoracic nerves?

Answer 2

12

Question 3

What are the number of lumbar nerves?

Answer 3

5

Question 4

How many pairs of nerves are in the spinal cord in total?

Answer 4

31

Question 5

What is the Pia Mater?

Answer 5

The innermost layer of the meninges. The Pia Cellular layer firmly adheres to the surface of the spinal cord. (Soft)

Question 6

What is the Dura Mater?

Answer 6

The thick membrane made of dense irregular connective tissue that surrounds the Brain and Spinal Cord. The outermost of the 3 layers of the membrane, meninges that protects the central nervous system.

Question 7

What are the 3 meningeal layers?

Answer 7

Dura Mater, Arachnoid mater, Pia Mater.

Question 8

What is the Cauda Equine?

Answer 8

Collection of nerves at the end of the spinal cord.

Question 9

What is Discriminative sensation information?

Answer 9

Ability to tell 2 different points of touch apart.

Question 10

What is the Meissner’s Corpuscle?

Answer 10

Consists of cutaneous nerve ending responsible for transmitting the sensations of fine, discriminative touch and vibration.

Question 11

What is the Pacinian Corpuscle?

Answer 11

Detects pressure changes and vibration.

Question 12

What type of nueron is myelinated in the spinal cord?

Answer 12

Pseudounipolar neurons.

Question 13

What type of neurons are responsible for pain/temperature ?

Answer 13

Unmyleinated neurons with free nerve endings (free nerve ending)

Ends at the back of the Gray Matter.

Question 14

What is the Dorsal Root Ganglion?

Answer 14

Bundle of cell bodies in the Dorsal Root.

Question 15

How does the sensory psuedounipolar neuron split?

Answer 15

One goes to the great matter (synapses with other neurons) and the other to the white matter (straight to the brain)

Question 16

What is convergence and what is the function?

Answer 16

1 sensory neuron picks up information from other neurons and then carries it to the brain.

This is done to reduce the volume of the spinal cord as there are less neurons going up to the brain.

Question 17

Where is the Motor and Sensory information carried?

Answer 17

Motor carried forward through Ventral Roots.

Sensory carried to the back through the Dorsal Roots.

Question 18

Where is the white and grey matter located in the spinal cord?

Answer 18

White is on the outside
Grey is on the inside.

Question 19

What is Cerivcal enlargement?

Answer 19

Area where information goes to and from the arms.

Question 20

What is Lumbar Enlargement?

Answer 20

Area of the spine where the information goes to and from the legs.

Question 21

Where are Opoiod receptors located?

Answer 21

Dorsal Gray roots.

Question 22

Where are the cell bodies for upper neurons located?

Answer 22

Precentral gyri of the cereal cortex.

Question 23

Where are cells bodies of lower neurons located?

Answer 23

Anterior gray horns of the spinal cord