Lab #3

Question 1

White matter trend in SC

Answer 1

Cervical = greatest amount

Sacral = least amount

Question 2

Gray matter trend in SC

Answer 2

• Most in cervical, lumbar enlargements (upper/lower limbs)

Question 3

Lateral horn segments

Answer 3

C8-L2

Question 4

Posterior intermediate sulcus

Answer 4

For cuneate fasciculus, at levels T6 and up

Question 5

Dorsal Nucleus of Clarke

Answer 5

• C8-L3/4
• Origin of the dorsal spinocerebellar tract (lower limb/trunk individual muscles)

Question 6

Intermediolateral cell comumn/ IML

Answer 6

• T1-L2/3
• Contains pre-ganglionic sympathetic cell bodies
• GVE

Question 7

Watershed SC Zone

Answer 7

C8-T9

Question 8

Location of great radicular artery of Adamkiewicz

Answer 8

• T9/T10
• Spinal medillary artery for ASA

Question 9

Conus Medullaris

Answer 9

• Ends at vertebrae L1/L2

Question 10

Filum Terminale

Answer 10

Attached to coccyx

Pia mater

No nerve fibers

Question 11

Lumbar Puncture

Answer 11

L3-S1

Because there’s a lumbar cistern L1/L2 to S2

Question 12

Onuf’s Nucleus

Answer 12

S1-S4

Somatomotor control of urethral and anal sphincters

Question 14

Cervical enlargements

Answer 14

• C3-T2
• Largest at C6

Question 15

Lumbar Enlargements

Answer 15

• L1-S3
• Greatest at S1

Question 16

Inferior medullary velum

Answer 16

The 4th ventricle covering

Question 17

Acoustic neuroma

Answer 17

TUmor in cerebellopontine angle resulting in hearing loss and balance problems as well as facial weakness and difficulty swallowing (bc tons of CNs are there)