Nuero A&P (spinal Cord, Ventricles, Cerebral Spinal Fluid)

Question 0

How many pairs of spinal nerves are there?

Answer 0

31 pairs

Question 1

Where does the CNS begin?

Answer 1

Begins below the foramen magnum

Question 2

The spinal cord is surrounded by what three meninges?

Answer 2

Spinal cord is surrounded by 3 meninges

• dura mater (outer most layer)
• arachnoid mater (middle layer)
• pia mater (inner most layer)

Question 3

The spinal cord is protected by what two things?

Answer 3

Cerebral spinal fluid and vertebral column

Question 4

The inner part of the spinal cord is composed of ______________

Answer 4

Grey matter

Question 5

The outer portion of the spinal cord is composed of ______________

Answer 5

White matter

Question 6

The spinal Cord carries spinal nerves from ________ nervous system to the ________ nervous system

Answer 6

1. Central Nervous System

2. Peripheral Nervous System

Question 7

The dorsal nerve root house what nerves?

Answer 7

Sensory

Question 8

Ventral Nerve Root houses what nerves?

Answer 8

Motor

Question 9

Grey mater is made up of

Answer 9

Motor neurons and interneurons

Question 10

White matter is made up of

Answer 10

Ascending and descending tracts

Question 11

Facts about gray matter

Answer 11

• Contains nerve cell bodies and unmyelinated axons
• Ventral horns (Motor)
• Dorsal horns (sensory)
• Motor neurons and spinal interneurons
• Organized in layers

Question 12

Some facts about white matter include

Answer 12

• Anterior (ventral), posterior (dorsal), and lateral white columns
• White color due to the high proportion of my Myelinated fibers
• Ascending tracks - sensory
• Descending tracts - motor

Question 13

How many ventricles are there and what are their names

Answer 13

There are four ventricles
Lateral ventricles (2), third ventricle and fourth ventricle

Question 14

How many openings are there in regards to the ventricles

Answer 14

There are five openings
Intraventricular foramina (2), cerebral aqueduct, foramina of luschka, foramen of magendie

Question 15

Describe cerebral spinal fluid

Answer 15

Cerebral spinal fluid is clear colorless fluid, produced in the choroid plexus in ventricular system, circulates from for ventricles to subarachnoid space through spinal cord.

Question 16

Brief description of cerebral spinal fluid flow

Answer 16

Lateral ventricle > third ventricle > fourth ventricle > subarachnoid space > brain > spinal cord

Question 17

Describe a cerebral spinal fluid absorption

Answer 17

Cerebrospinal fluid is absorbed through arachnoid villi in the arachnoid granulation’s.