Numbness

Question 1

loss of sensation

Answer 1

Numbness

Question 2

Numbness is caused by damage to what structure?

Answer 2

Ascending tracts

Question 3

What are the ascending tracts?

Answer 3

Spinothalamic
Dorsal Column Medial Lemniscus (DCML)
Spinocerebellar

Question 4

Receives pain, temperature impulses from the dorsal
horn (from extremities)

Answer 4

Spinothalamic tract

Question 5

Types of spinothalamic tract

Answer 5

Anterior and Lateral

Question 6

Primary sensory area

Answer 6

Area 3, 1, 2

Question 7

Begins at temperature and pain receptors

Answer 7

Neuron 1 Spinothalamic tract

Question 8

Axon and cell body of neuron 1

Answer 8

Axon: Peripheral nn
Cell body: DRG

Question 9

Where does neuron 1 enter?

Answer 9

Dorsal horn of the spinal cord

Question 10

Pain pathway

Answer 10

LST

Question 11

Where does neuron 2 start?

Answer 11

Dorsal column

Question 12

Where does the pain sensation go to from neuron 2?

Answer 12

VPL

Question 13

Where does temperature sensation go from neuron 2?

Answer 13

Nucleus Proprius Dorsalis

Question 14

A lesion that may lead to loss of pain and temperature sense.

Answer 14

Thalamic lesions

Question 15

Where does neuron side tracks to?

Answer 15

Reticular formation

Question 16

Where does neuron 3 of the Spinothalamic tract begin?

Answer 16

Ventral Posterolateral Nucleus of the Thalamus (VPL)

Question 17

Where does sensation go from the VPL?

Answer 17

Primary sensory area (3, 1, 2)

Question 18

Posterior columns

Answer 18

Dorsal Column Medial Leminiscus

Question 19

What sensations does DCML receive?

Answer 19

Conscious proprioception, Vibratory sense, 2-pt discrimination, Tactile sense

Question 20

Transmits the sensations received by the DCML from the upper body

Answer 20

Fasciculus Cuneatus

Question 21

Transmits the sensations received by the DCML from the lower body

Answer 21

Nucleus Gracilis

Question 22

Pathway for sensation reception

Answer 22

Receptors
Peripheral nn
Dorsal column of the SC
Decussates to go up to the brain stem
VPL
Thalamus
Primary sensory area

Question 23

Responsible for unconscious sensation

Answer 23

Spinocerebellar tract