Chapter 16: Spinal Cord And Spinal Nerves

Question 1

Spinal cord

Answer 1

• link between the brain and the rest of the body
• controls reflexes
• site for integration of neuronal stimulation

Question 2

Spinal nerve functions

Answer 2

• pathway for sensory and motor impulses
  -responsible for reflexes

Question 3

Spinal meninges

Answer 3

Cover the spinal cord that excisions from the intervertebral foramina

Question 4

Cerebral spinal fluid

Answer 4

Shock absorbing fluid in the spinal cord

Question 5

Denticulate ligament

Answer 5

Thickenings of the pia mater that project and connect the arachnoid mater to the dura mater

Question 6

Dura mater

Answer 6

• most superficial
• made of dense p, irregular connective tissue

Question 7

Epidural space

Answer 7

• space between the dura mater and the walls of the vertebral canal

Question 8

Arachnoid mater

Answer 8

• middle layer
• Avascular covering
• contain collagen fibres and some elastic fibers

Question 9

Subdural space

Answer 9

• between the dura mater and the arachnoid
• contains interstitial fluid

Question 10

Pia mater

Answer 10

• Inner most layer
• highly vascular, transparent connective tissue
• adheres to the surface of the spinal cord
• contains squamous and cuboidal cells within interlacing bundles if collage and elastic fibres

Question 11

Gross anatomy of spinal cord: parts

Answer 11

Superior to inferior
- cervical
- thoracic
- lumbar
- sacral
- coccygeal

Question 12

Conus medullaris

Answer 12

The tapering inferior me of the spinal cord

Question 13

Cauda equine

Answer 13

“Hourses tail”
- axons that extend inferiorly from the spinal cords conus medullaris

Question 14

Volume terminale

Answer 14

The strand of pia mater within cauda equina that attaches to the medullaris to the coccyx

Question 15

Cervical enlargement

Answer 15

• Located in the inferior cervical part of the spinal cord
• inner areas the upper limbs

Question 16

Lumbosarcal enlargement

Answer 16

• extends through the lumbar and sacral parts of the spinal cord
• innervates the Lower limbs

Question 17

Grey matter

Answer 17

• unmyelinated axons and glial cells
  Contains:
• posterior horn
• lateral horn
• anterior horn
• gray commissure

Question 18

White matter

Answer 18

Myelinated axons
Contains:
- posterior funiculus
- lateral funiculus
- anterior funiculus

Question 19

Anterior horns

Answer 19

• Grey matter
• House somatic motor neurons
• Inner age skeletal muscles

Question 20

Lateral horns

Answer 20

Grey matter
- contain motor neurons
- innervate cardiac muscles, smooth muscles, and glands

Question 21

Posterior horns

Answer 21

• Grey matter
• sensory neurons and cell bodies of interneurons
• receive sensory information from the body

Question 22

Gray commissure

Answer 22

Grey matter
- houses a narrow central canal

Question 23

Posterior ramus

Answer 23

Innervates the deep muscles and skin of the back and posterior surface of the trunk

Question 24

Anterior ramus

Answer 24

Innervates the anterior and lateral portions of the trunk and the upper and lower limbs

Question 25

Rami

Answer 25

Communicates
Extended between the spinal nerves and the sympathetic trunk ganglia

Question 26

Posterior/ doral root

Answer 26

Sensory

Question 27

Anterior/ ventral root

Answer 27

Motor

Question 28

Spinal plexus

Answer 28

Network of axons