Chapter 13 - Spinal Cord/Nerves

Question 1

functions of the spinal cord

Answer 1

conduction, neural integration, locomotion, reflexes

Question 2

where does the spinal cord begin and end

Answer 2

• begins at foramen magnum
• ends at conus medullaris: around L1 vertebrae
• gives rise to 31 pairs of spinal nerves

Question 3

define sensory neurons

Answer 3

convey sensory information to CNS

Question 4

define association neurons

Answer 4

within CNS

Question 5

define motor neurons

Answer 5

convey info from CNS to muscules or glands

Question 6

define myelin

Answer 6

axonal covering for a faster signal

Question 7

spina bifida

Answer 7

• vertebrae fail to form a complete vertebral arch for enclosure of the spinal cord
• folic acid reduces risk of spina bifida

Question 8

dermatome

Answer 8

segment of skin supplied by single sensory nerve

Question 9

poliomyelitis

Answer 9

• destruction of motor neurons leading to skeletal muscle atrophy
• caused by the polio virus

Question 10

ALS

Answer 10

• destruction of motor neurons and muscular atrophy
• scarring of lateral regions of the spinal cord