Spinal Cord

Question 1

The spinal cord is part of which nervous system?

Answer 1

The central nervous system

Question 2

Nervous tissue tube is found inside the

Answer 2

Vertebral Canal

Question 3

The vertebral canal contains bundles of fibers going to the brain, called ______ which bring information about the external environment to the brain

Answer 3

Afferent or sensory tracts

Question 4

The vertebral canal contains bundles of fibers coming from the brain called ________ which sends messages from our brain to the rest of our body

Answer 4

Efferent or Motor Tracts

Question 5

What is the length of the spinal cord in cm and inches?

Answer 5

45 cm

17-18 inches

Question 6

In the adult, where does the spinal cord extend to?

Note: In a fetus it extends all the way to coccyx

Answer 6

Intervertebral disc between L1 and L2

Question 7

In the cervical region, it is a little wider than elsewhere. What is this this called?

Answer 7

Cervical Enlargement

Question 8

Where does cervical enlargement extend to and from?

What does it form?

Answer 8

C4-T1

Brachial Plexus

Question 9

Why is there the cervical enlargement?

Answer 9

Important for innervating upper limb

Question 10

Another enlargement lower down on the spine

Answer 10

Lumbar enlargement

Question 11

Where does the lumbar enlargement extend to?

Answer 11

T11-L1

Question 12

What does the lumbar enlargement form?

Answer 12

Lumbosacral Plexus

Question 13

What does the lumbar enlargement innervate?

Answer 13

Lower extremity

Question 14

Pointed cone shaped end of the spinal cord at L1-2

Answer 14

Conus Medularrus

Question 15

A collection of dorsal and ventral nerve roots at the inferior end of the spinal cord filling in the vertebral canal

Answer 15

Cauda Equina

Question 16

The brain and spinal cord are covered by 3 layers of connective tissue called the

Answer 16

Meninges

Question 17

The outermost meningeal covering, very thick and tough, the epidural space lies between the vertebrae and it

Answer 17

Dura Mater

Question 18

Space filled with fatty tissue that helps protect the spinal cord between vertebra and dura mater

Answer 18

Epidural Space

Question 19

A pouch inferior to the conus medullaris formed by the dura mater. It contains the cauda equina

Answer 19

Lumbar Cistern

Question 20

The middle layer of meninges that is a delicate membrane with fine branching fibers giving a spider web appearance

Answer 20

Arachnoid Mater

Question 21

Deep to membrane is subarachnoid space and contains

Answer 21

Cerebrospinal Fluid

Question 22

What does cerebrospinal fluid do?

Answer 22

Protects the spinal cord

Question 23

Cauda equina lies in cistern and is bathed in the

Answer 23

Cereobraspinal fluid

Question 24

Located between the arachnoid and the PIA, CSF is contained in this space

Answer 24

Subarachnoid Space

Question 25

The innermost layer, very adherent to spinal cord and is very thin

Answer 25

PIA Mater

Question 26

Extensions of the pia that attach the psinal cord to the arachnoid and dura; 20-22 pairs along the length of the cord.

Answer 26

Denticulate ligaments

Question 27

A thin, thread like extension of the pia mater that hold the spinal cord to the sacrum

Answer 27

Filum Terminale

Question 28

Used to obtain CSF from the lubar cistern, and important diagnostic tool for evaluating a variety of nervous system disorders (meningitis, stroke)

Answer 28

Lumbar Puncture or Spinal Tap

Question 29

The needle of a spinal tap passes between __ and ____ or ___ and ____ It penetrates the ________ between lamina to enter the spinal canal in subarachnoid space

Answer 29

L3 and L4, L4 and L5 Ligamentum Flavum

Question 30

If there is blood in CSF, it indicates that a ____ has occurred

Answer 30

stroke

Question 31

is located in lumbar cistern, it's floating around in fluid and is therefore unlikely that a needle could hit the dorsal/ventral roots

Answer 31

Cauda Equina

Question 32

Where do the 31 pairs of spinal nerves enter from the vertebral canal?

Answer 32

Intervertebral Foramina

Question 33

8, 12, 5, 5, 1

Answer 33

``` 8 Cervical 12 Thoracic 5 Lumbar 5 Sacral 1 Coccygeal ```

Question 34

Where is C8?

Answer 34

Below C7

Question 35

A nerve that contains both afferent and efferent fibers Formed by joining of 2 roots, dosral and ventral

Answer 35

Mixed spinal nerve

Question 36

A collection of nerve cell bodies involved in bringing sensory information to the spinal cord

Answer 36

Dorsal Root Ganglion

Question 37

Area of skin innervated by the cutaneous branch of a single spinal nerve

Answer 37

Dermatomes

Question 38

All spinal nerves except __ participate in dermatomes Pin prick can be used to test spinal nerves

Answer 38

C1

Question 39

Which group of nerves is sensory? Which is motor?

Answer 39

Dorsal Ventral

Question 40

White matter contains Grey Matter contains

Answer 40

Fibers extending down and up (sensory and motor) Neurons involved in sensory and motor function