Spinal cord and Spinal Nerves

Question 1

What part of the spine is the spinal cord located?

Answer 1

Vertebral canal (individual vertebral foramen)

Question 2

The spinal cord has a meninges consisting of what three layers?

Answer 2

Pia mater (inner)

Arachnoid mater (middle)

Dura mater (outer)

Question 3

What are the two enlargements in the spinal cord?

Answer 3

Cervical enlargement

Lumbar enlargement

Question 4

What are the three horns of grey matter?

Answer 4

Anterior(ventral) horn

Lateral horn

Posterior(dorsal) horn

Question 5

What is the difference between the Posterior(dorsal) root and the Anterior(ventral) root?

Answer 5

Posterior(dorsal) root contain sensory neurons and transmit sensory nerve impulses to CNS

Anterior root contains motor neurons and transmit motor nerve impulses from CNS

Question 6

Name and explain the origin of the coverings in a spinal nerve

Answer 6

Endoneurium - connective tissue surrounding individual neuron axons

Perineurium - connective tissue surrounding fascicles(bundle of axons) in a nerve

Epineurium - superficial connective tissue surrounding an entire nerve (covering the myelin sheath)