Lecture 3 - Somatosensory pathways

Question 1

Propioception, Fine touch and vibration are part of (ALS/DCML)

Answer 1

DCML

Question 2

Pain is part of which somatic sensation?

Answer 2

ALS

Question 3

Where are 2nd order neurons found in the DCML pathawy?

Answer 3

Medulla - Decussation!!!

Question 4

Which Axons are have more myelin DCML or ALS

Answer 4

DCML More myelin = FASTER

Question 5

What is a Dermatome

Answer 5

An are of skin that is mainly supplied by a SINGLE spinal nerve

Question 6

Sensory Neurons are ……?

Answer 6

Psuedounipolar

Question 7

The gracile tract of 1st order nuerons in the DCML is upper or lower limbn

Answer 7

Lower limb (more medial than Cuneate)

Question 8

The second synapse in DCML occurs in the ….. of the thalamus

Answer 8

Ventral Posterior Thalamus (VPL)

Question 9

Pain sensory neurons have………. Nerve endings

Answer 9

Free nerve endings

Question 10

Where do 1st order neurons synapse in the ALS system?

Answer 10

DORSAL HORN of spinal cord

Question 11

Where do 2nd order neurons Decussate in the ALS system?

Answer 11

Anterior White Comissure

Question 12

What are the 2 types of Pain fibers

Answer 12

Ag or C fibers

Question 13

Answer 13