Lamina of the Spinal Cord

What are the pain laminae (nociception and temperature)?

What are the pain laminae (nociception and temperature)?

Laminae I, II, and V

What are the touch and proprioception laminae?

Laminae III, IV, VI, and VII

What does lamina I respond to?

Noxious stimuli (sends axons to contralateral spinothalamic tract)

What does lamina II respond to?

Noxious stimuli (produces substance P)

What is another term for lamina II?

Substantia Gelatinosa

What does lamina III respond to?

Position and light touch sense

What does lamina IV respond to?

Position and light touch sense

What is another term for lamina III and IV?

Nucleus Proprius

What does lamina V respond to?

Responds to both noxious and visceral afferent stimuli

What does lamina VI respond to?

Responds to mechanical signals from joints and skin

What does lamina VII respond to?

Proprioception (Cells of Clarke’s Column)

What does lamina VIII and IX contain?

Motor neurons

The medial motor neuron column contains…

LMNs that innervate axial musculature (e.g., muscles of the trunk and proximal parts of limbs)

The lateral motor neuron column contains…

LMNs that innervate the distal arm and leg muscles

Motor neurons close to the central canal innervate…

Flexor muscles

Motor neurons located more peripherally innervate…

Extensor muscles

Lamina I

Lamina II (Substantia Gelatinosa)

Lamina IV

Lamina IX - Motor Neuron Pools

Lamina VIII

Lamina VII

Lamina X