Nervous system - Spinal Cord

Question 1

What are descending tracts?

Answer 1

The pathway by which motor signals are sent from the brain to the spinal cord

Question 2

What are the 5 nerve root groups called?

Answer 2

Cervical
Thoracic
Lumbar
Sacral
Coccygeal

Question 3

What are the layers that protect the brain and spinal cord?

Answer 3

Three layers of the meninges

Question 4

What is the inner layer of the meninges?

Answer 4

Pia meter

Question 5

What is the middle layer of the meninges?

Answer 5

The arachnoid, a web-like structure filled with fluid to cushion the brain

Question 6

What is the outer layer of the meninges?

Answer 6

The dura meter

Question 7

How long is the spinal cord?

Answer 7

0.4-0.5m

Question 8

What is the function of the spinal cord?

Answer 8

Transmit signals between the brain and the body

Question 9

Where does the spinal cord run between?

Answer 9

From the medulla oblongata to approximately the C1 and L2 vertebrae

Question 10

What is gray matter?

Answer 10

Grey matter refers to unmyelinated neurons and other cells of the central nervous system

Question 11

What is white matter?

Answer 11

Nerve fibres are surrounded by a myelin sheath which gives the white matter its colour

Question 12

What is the path of the spinal fluid?

Answer 12

Choroid plexus -> lateral ventricle -> 3rd ventricle -> 4th ventricle -> sub arachnoid space or central canal of spinal cord

Question 13

Function of cerebro spinal fluid?

Answer 13

Acts like a cushion against injury to the brain or spinal cord. Removes waste products from the brain and helps your CNS work properly