Lesson 4

Question 1

• Contains neurons that respond to noxious stimuli
• Sends axons to the contralateral spinothalamic tract

Answer 1

Layer 1: Marginal
layer

Question 2

Small neuron that respond to noxious stimuli*

Answer 2

Substantia gelatinosa

Question 3

Receives information about position and light touch sense

Answer 3

Layers 3-4: Nucleus proprius

Question 4

• Responds to visceral noxious and afferent stimuli (mechanical signals from joints and skin)

Answer 4

Layer 5

Question 5

• Deepest layer of the dorsal horn
• Responds to mechanical signals of joints and skin

Answer 5

Layer 6

Question 6

• Contains the intermediolateral nucleus (or intermediolateral cell column) in thoracic and upper lumbar regions from which the preganglionic sympathetic fiber project to the sympathetic ganglia
• Gives rise to posterior spinocerebellar tract (relays unconscious, proprioceptive information to the cerebellum)

Answer 6

Dorsalis or Clarke’s nucleus /column
Intermediolateral cell column
Zona Intermedia

Question 7

• Contains the cell bodies of motor neurons innervating skeletal ms
• Contains the motor interneurons part of reflex pathway in the spinal cord

Answer 7

Layer 8-9

Question 8

• Small neurons around the central canal and their remnants

Answer 8

Layer 10