Spinal cord tutorial

Question 1

what is anterior white commisure

Answer 1

nerve fibres which cross the middle of the spinal cord (spinothalamic tract)

Question 2

describe a cervical cross section of spinal cord compared to a sacral

Answer 2

more white matter compared to grey
more oval in shape
prescence of cuneate fasciculus

Question 3

what information crosses in Clarke’s nucleus

Answer 3

posterior spinocerebellar tract

Question 4

rubrospinal

Answer 4

Activation of flexor muscles in the upper limbs and inhibition of extensors on the contralateral side.

cross in the mibrain

Question 5

reticulospinal

Answer 5

• The medial reticulospinal tract arises from the pons. It facilitates voluntary movements, and increases muscle tone.
• The lateral reticulospinal tract arises from the medulla. It inhibits voluntary movements, and reduces muscle tone