Spinal Cord

Question 1

_________________ & _______________________ made great contributions to the understanding of the spinal cord

Answer 1

Ramon y Cajal & Manuela Serra

Question 2

The spinal cord extends from the base of the brain, exiting through the ______________.

Answer 2

foramen magnum

Question 3

The ___________ is housed in the ____________, a hollow space found in ___#___ individual, interlocking bones called ____________ .

Answer 3

spinal cord
vertebral canal
33
vertebrae

Question 4

Vertebrae form the __________________, a flexible, yet sturdy structure that protects the spinal cord while allowing movement.

Answer 4

spinal/vertebral column

Question 5

How many pairs of nerves are there branching from the spinal cord?

Answer 5

31

Question 6

cervical nerves

Answer 6

8

Question 7

thoracic nerves

Answer 7

12

Question 8

lumbar nerves

Answer 8

5

Question 9

sacral nerves

Answer 9

5

Question 10

coccygeal nerves

Answer 10

1

Question 11

The __________ enlargements are widened areas of the spine that give attachment to the nerves which supply both the upper limbs.

Answer 11

cervical

Question 12

The __________ enlargements are widened areas of the spine that give attachment to the nerves which supply both the lower limbs

Answer 12

lumbar

Question 13

The _____________ is the termination of the spinal cord at L1.

Answer 13

conus medullaris

Question 14

The _______________ is an arrangement of nerves below the conus medullaris.

Answer 14

cauda equina

Question 15

What nerves comprise of the cauda equina?

Answer 15

1.) lumbar nerves 2-5
2.) sacral 1-5 nerves
3.) coccygeal nerve

Question 16

Central region of gray matter, consisting of columns of _________________ or “butterfly”

Answer 16

neuronal somata

Question 17

Three sections of the spinal cord (horns)

Answer 17

1.) anterior
2.) lateral
3.) posterior

Question 18

White matter in the periphery is formed by ascending and descending ___________ , __________, & _________.

Answer 18

fibers, fasciculi and columns

Question 19

Posteromarginal nucleus ( I )

Answer 19

pain and temperature sensation

Question 20

Substantia gelatinosa ( II )

Answer 20

pain, temperature, and light touch

Question 21

Nucleus proprius (IV)

Answer 21

crude touch, senses of position and movement

Question 22

Nucleus dorsalis or Clarke’s column (V)

Answer 22

sensory proprioceptive info from muscle spindles and tendons. (Extends from C8 to L3-4 segments)

Question 23

Intermediomedial and lateral nuclei (VII - ish)

Answer 23

Visceral afferents for autonomic system. Extend from T1 to L3. (Some motor interneurons as well)

Question 24

Lateral nuclei (IX)

Answer 24

Present in CERVICAL and LUMBOSACRAL segments, motor neurons that innervate the distal muscles of the UPPER and LOWER limbs

Question 25

Medial nuclei (IX)

Answer 25

Motor neurons that innervate the upper and lower medial muscles: neck and trunk, intercostal and abdominal

Question 26

Which laminae relay tactile sensory information to the brain?

Answer 26

Laminae I-IV

Question 27

Which laminae relay proprioceptive sensation to the midbrain and the cerebellum?

Answer 27

V-VI