the spinal cord

Question 1

what are the 3 things that make up the cranial meninges

Answer 1

dura mater
arachonoid mater
pia mater

Question 2

Pia Mater

Answer 2

intermost later, it is a thin and delicate membrane that sticks close to the surface of the brain and spinal cord

Question 3

dura maatter

Answer 3

The outermost layer-tough and durable membrane that lines the inside of the skull. It helps protect the brain and spinal cord from injury and provides a barrier between the brain and the skull.

Question 4

where is the Arachnoid Mater

Answer 4

beneath the dura matter

Question 5

Arachnoid Mater

Answer 5

web-like membrane. The space between the arachnoid mater and the pia mater contains cereobrinalspinal fluid

Question 6

what is the role of the cereobraibrinal fluid

Answer 6

cushion and protect the brain and spinal cord

Question 7

subarachnoid space

Answer 7

space between The space between the arachnoid mater and the pia mater

Question 8

what are the psychial support of the cns

Answer 8

cranium and verterbal collum
mengines
CSF

Question 9

what are the spinal mengines

Answer 9

dura matter
arachonid matter
pia matter
verterbra
spinal cord

Question 10

what % of the brain is gray matter

Answer 10

40% - cell bodies ,dendrites, axon terminals

Question 11

what % of the brain is white matter

Answer 11

60%- axons

Question 12

in the white matter of the brain what are the fibres

Answer 12

projection fibres
assosication fibres
commissural fibres
corpus callosum

Question 13

what is the role of projection of fobres

Answer 13

connects cerebal cortex with lower levels of brain or spinal cord

Question 14

what is the role of assosication fibres

Answer 14

connects 2 areas of cerebal cortex on same side of the brain

Question 15

what is the role of commisural fibres

Answer 15

connects same cortical regions on 2 sides of the brain

Question 16

what is the role of the corpus collsum

Answer 16

primary location of commissural fibers

Question 17

summarise the spinal cord

Answer 17

cylindrical nervous tissue
continius with brain
surrounded by vertebral column
spinal nerves branch of (31)

Question 18

what are the spinall nerves called in the spine

Answer 18

cervial =8
thoracic=12
lumbar =5
sacral=5
coccygeal=1

Question 19

what is dermatomes?

Answer 19

each dermatome is a sensory region on the surface of the body served by a particular spinal nerve

Question 20

what are the 2 functional halves gray matter

Answer 20

dorsal: sensory functions
ventral: motor functions

spinal nerves are dixed

Question 21

summarise the spinal cord cross section:

Answer 21

gray matter
white matter
central canal
spinal nerves
dorsal root ganglion (DRG)
Functional roles

Question 22

Gray matter in the cross section:

Answer 22

H shaped central region and contains neuronal cell bodies and dendrites

Question 23

white matter in the cross section

Answer 23

surrounds gray matter and is composed of myelinated axons

Question 24

central canal in cross section

Answer 24

filled with cerebrospinal fluid and it runs through the centre of the gray matter

Question 25

spinal nerves in cross section

Answer 25

emerge from the spinal cord and contains both sensory and motor fibres

Question 26

Dorsal root Ganglion (DRG) in cross section

Answer 26

located on the posteorir root of each spinal nerve and contains cell bodies of sensory neurones

Question 27

Funcitonal roles in cross section

Answer 27

the gray matter processes sensory info and generates motor commands white matter facilitates communication between diff parts of the nervous sytem spinal cord a vital role in relaying information between the brain and the body

Question 28

spinal reflexes and the afferent eurones

Answer 28

Afferent neurons convey an impulse from sensory receptors to the CNS and efferent neurons run from the CNS to the effector organ

Question 29

what does the white matter tracts ...

Answer 29

ascedning descedning

Question 30

strech reflex is a quick

Answer 30

Stretching the Muscle: When a muscle is stretched, special sensors called muscle spindles detect the stretch. Sending Signals: These sensors send signals to the spinal cord through nerves. Quick Reaction: The spinal cord immediately sends signals back to the same muscle, causing it to contract or tighten. Purpose: This reflex helps prevent overstretching of muscles, maintaining stability and preventing injuries.

Question 31

ascedning tract

Answer 31

They carry messages from our body's senses, like touch or pain, up to the brain for processing.These tracts run through the spinal cord and brainstem. Each tract is like a specialized route for specific types of sensory information

Question 32

descedning tract

Answer 32

They carry messages from the brain down to the spinal cord to control movements.