Spinal Cord

Question 0

Ventral Plate

Answer 0

Basal plate/Ventral horn…
Front side of spinal cord…
Associated with motor (efferent) signalling

Question 1

Dorsal Plate

Answer 1

Alar plate/dorsal horn…
Back side of spinal cord…
Associated with sensory (afferent) signalling

Question 2

Meningeal Coverings of Spinal Cord

Answer 2

1) Dura Mater
2) Arachnoid Mater
3) Pia Mater

Question 3

Dura Mater

Answer 3

Tough covering over the entire spinal cord

Question 4

Arachnoid Mater

Answer 4

Immediately deep to Dura Mater…

Weblike structure that creates spinal fluid

Question 5

Pia Mater

Answer 5

Deep to Arachnoid Mater…
2 types:
1) Denticulate ligaments: Lateral projections of pia mater that anchor spinal cord in Dural sac
2) Filum Terminales: Inferior projection of pia mater off tip of spinal cord into sacral canal

Question 6

Subdural Space

Answer 6

Space b/w Dura Mater and Arachnoid Mater

Question 7

Epidural Space

Answer 7

Space b/w vertebral bone and Dura Mater (contains fat)

Question 8

Subarachnoid Space

Answer 8

Space b/w Arachnoid space and Pia mater

Question 9

What is the difference b/w spinal CORD root and spinal NERVE root

Answer 9

Spinal CORD roots are either sensory or motor modality

Spinal NERVE roots have all modalities

Question 10

Arrange the following terms in order from 
spinal column--->periphery
1)Spinal Nerve Root
2)Rootlet
3)Spinal Cord Root

Answer 10

Rootlet—>Spinal Cord Root—>Spinal Nerve Root

2->3->1

Question 11

Definition of Ganglion

Answer 11

Cluster of neuron cell bodies outside CNS

Question 12

Anterior/Posterior Rami

Answer 12

Branches of the Spinal Nerve Root that lead to periphery…
Anterior Rami-large and make up spinal nerve plexuses (hypaxial invervations)
Posterior Rami-small and limited in region they inervate (epaxial inervations)

Question 13

Conus Medularis

Answer 13

The end of the spinal cord proper (around T12-L2)

Question 14

Cauda Equina

Answer 14

“Horses Tail”

Nerve roots coming off end of spinal cord

Question 15

How many nerves are there in each vertebral section

Answer 15

L1-8
T1-12
C1-5
S1-5
Co-1 (coccygeal)

Question 16

Where are the nerves located in relation to the vertebrae

Answer 16

In the Cervical region, the nerves are above the corresponding vertebrae…
In all other regions, the nerves are below the corresponding vertebrae

Question 17

Types of sensory…

Answer 17

1) Exteroception: feeling pain and knowing what hurts and why it hurts
2) Interoception: feeling pain but not sure what is wrong (causes referred pain)
3) Proprioception: help body understand where it is in space

Question 18

Dermatome

Answer 18

An area of skin innervated by the sensory fibers of a single nerve root

Question 19

Myotome

Answer 19

A group of muscles that is primarily innervated by the motor fibers of a single nerve root