Spinal Cord Anatomy

Question 1

What is the white matter separated to in the spinal cord?

Answer 1

Dorsal/Lateral/Ventral Funiculus

Question 2

What is gray matter?

Answer 2

Cell bodies

Question 3

What is white matter?

Answer 3

Fibers - axons

Question 4

Where is the alar plate located?

Answer 4

Dorsal Funiculus

Question 5

Where is the basal plate located?

Answer 5

Ventral Funiculus

Question 6

Dorsal Horn - Substantia Gelatinosa

Answer 6

Small compact cells that modulate pain sensory input

Question 7

Dorsal Horn - Nucleus Proprius

Answer 7

Cells of origin of the spinothalamic tract that receives many sensory inputs

Question 8

Intermediate Gray Area - Nucleus Dorsalis

Answer 8

AKA “Clark’s Nucleus” and is used for the dorsal spinocerebellar tract

Question 9

Lateral Horn - Intermediolateral Nucleus

Answer 9

Origin of the preganglionic sympathetic cholinergics and is found from T1 to L3

Question 10

Intermediate Gray Area - Intermediomedial Nucleus

Answer 10

Receives visceral afferents - not as important as IML

Question 11

Ventral Horn - Medial and Lateral Motor Nuclei

Answer 11

Axial muscles are medial and muscles such as those in your hand are controlled by the lateral nuclei

Question 12

What are the non-encapsulated receptors?

Answer 12

• Free Nerve Endings
• Merkel’s Disk
• Hair Follicle

Question 13

What are the fast adapting receptors?

Answer 13

• Hair Follicle
• Meissner’s Corpuscle
• Pacinian Corpuscle

Question 14

Meissner’s Corpuscle Function

Answer 14

2 point discrimination

Question 15

Pacinian Corpuscle Function

Answer 15

Vibration

Question 16

What information does the dorsal column pathway relay?

Answer 16

GSA

• 2 point discrimination
• Vibration sense
• Proprioception (positional)

Question 17

What are the receptors of the DCP?

Answer 17

• Meissner’s Corpuscle
• Pacinian Corpuscle
• Neuromuscular Spindle
• Golgi Tendon Organs

Question 18

Romberg’s Sign

Answer 18

Romberg’s sign is positive if the patient requires vision to stand steadily.

Question 19

What is the origin of the spinothalamic tract?

Answer 19

Nucleus Proprius

Question 20

Brown-Sequard Lesion

Answer 20

• Proprioception lost on the side of the lesion

- Pain and temperature lost on the opposite side of the lesion

Question 21

What is the only afferent that goes through the superior cerebellar peduncle?

Answer 21

Ventral Spinocerebellar Tract

Question 22

What is the function of the corticospinal tract?

Answer 22

Controls fine movement