Spinal Cord

Question 1

What are the main functions of the spinal cord?

Answer 1

Conduction
Neural integration
Locomotion
Reflexes

Question 2

______- is a function of the spinal cord that sends sensory signals from the body to the brain and also motor signals from the brain to the muscles.

Answer 2

Conduction

Question 3

________- Is a function that has pools of neurons integrate signals from various source

Answer 3

Neural integration

Question 4

_______- Is a function is to control movement

Answer 4

Locomotion

Question 5

_______- Is a function that controls posture, motor, coordination, and protection from injury

Answer 5

Reflexes

Question 6

How many pairs of mixes spinal nerves are there?

Answer 6

31 pairs

Question 7

What are the two areas of the spinal cord that are thicker then others and why?

Answer 7

Cervical controls the nerves to the upper limbs

Lumbar controls the nerves to the pelvic region and lower limbs

Question 8

Where is the medullary cone and how would you identify it?

Answer 8

It is where the cord tappers to a point inferior to the lumbar enlargement

Question 9

Where is the caude equina and what is it?

Answer 9

It is a bundle of nerve roots that are found in the vertebral canal from L2-S5

Question 10

What are the three fibrous membranes that enclose the brain and spinal cord?

Answer 10

Dura mater
Arachnoid
Pia Mater

Question 11

________ is a sheath that surrounds the spinal cord and separates from the peritoneum of the vertebra. It is also used for stability

Answer 11

Dura mater

Question 12

_____ is a membrane that adheres to dura and is separated from the pia by fibers. It is filled with fluid and this is where they shoot for when getting a spinal tap.

Answer 12

Arachnoid

Question 13

________ is a delicate membrane that is transparent and follows the contour of the CNS

Answer 13

Pia mater

Question 14

What is the difference between grey and white matter?

Answer 14

Grey matter is neuron cell bodies with little or non myelin. It is a site for information processing and synaptic integration
White matter is myelinated axons and carries signal from one part of the CNS to another

Question 15

What are the parts to the central core of the spinal cord and what is it made of?

Answer 15

Posterior horn
Lateral horn
Anterior horn
Gray commissure
It is all made of grey matter

Question 16

What does the posterior horn do?

Answer 16

It receives information only from sensory and is made of the cell bodies of interneurons

Question 17

What does the anterior horn do?

Answer 17

It is found on the ventral side and holds the somas for motor neurons and that is it.

Question 18

What is grey commissure for?

Answer 18

It connects the right and left sides of the spinal cord

Question 19

What is the lateral horn for?

Answer 19

It is visible from T2 through L1 and the neurons are a part of the sympathetic nervous system.

Question 20

What is white matter made of and what is the function?

Answer 20

It is made of bundles of axons that go up and down the white matter starting in the brain or parts of the grey matter. It is used for communication between levels in the CNS

Question 21

What are the three faniculi (parts) of white matter?

Answer 21

Posterior
Lateral
Anterior

Question 22

What are two distinct tracks that are found in faniculi and what do they do?

Answer 22

Ascending - sensory info to higher levels of the cord and brain
Descending - Motor signals from brain to meet motor neurons that control the muscles or glands

Question 23

What is decussation?

Answer 23

The crossing over to the other side of the brain or spinal cord