Spinal Cord and Spine part 1

This canal is filled with cerebrospinal fluid

This nerve root exits above the T12 vertebra.

This nerve root exits below the T11 vertebra

In neurulation, this structure becomes the PNS

This literally translates into "horse's tail"

This type of nerve fibers are motor fibers to the internal organs

• somatic afferent

• visceral afferent

• visceral efferent

• somatic efferent

The spinal root of the Quadriceps femoris:

• L2, L3

• L2

• L3

• L4

• L3, L4

All of the following are descending fiber systems, except:

• Corticopsinal tract

• Spinothalamic tract

• Medial longitudinal fasciculus

• Vestibulospinal tract

This ascending fiber system plays a role in deep, chronic pain

• Dorsal column tract

• Spinoreticular pathway

• Dorsal spinocerebellar tract

• Ventral spinocerebellar tract

How many layers of nerve cells are present in a typical gray matter?

• 7

• 10

• 15

• 5