Spinal Cord & PNS

Question 1

Vertebrae structure

Answer 1

Body: skeletal support
Posterior arches: protection
Disk: flexibility & shock support

Question 2

Grey matter

Answer 2

Contains cell bodies, synapses, dendrites
Located at the horn regions

Question 3

White matter

Answer 3

Contains myelinated axons
Located at the columns

Question 4

Dorsal root

Answer 4

Carries sensory input into the spinal cord

Question 5

Ventral root

Answer 5

Carries motor output out of the spinal cord

Question 6

Sympathetic ganglion

Answer 6

Relay between spinal cord & internal organs

Question 7

Dorsal horn

Answer 7

Contains sensory neurons

Question 8

Ventral horn

Answer 8

Contains motor neurons

Question 9

Central canal

Answer 9

Contains CSF

Question 10

Funiculi

Answer 10

Contain spinal tracts

Question 11

Segmentation of the spinal cord

Answer 11

1. cervical = 7
2. thoracic = 12
3. lumbar = 5
4. sacral = 5

Question 12

C1-8

Answer 12

Neck, shoulders, superior arms

Question 13

T1-3

Answer 13

Inferior arms

Question 14

T4-6

Answer 14

Upper torso

Question 15

T7-9

Answer 15

Mid torso

Question 16

T10-12

Answer 16

Lower torso

Question 17

L1-3

Answer 17

Anterior upper legs

Question 18

L4-5

Answer 18

Anterior lower legs

Question 19

S1-4

Answer 19

Posterior legs, genitals

Question 20

Cauda equina

Answer 20

L2-3 where spinal cord ends
Location to perform a spinal tap

Question 21

Somatic systems

Answer 21

Innervation of muscles and skin