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Limbic system > the spinal cord > Flashcards

the spinal cord Flashcards

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1
Q

what are the 3 things that make up the cranial meninges

A

dura mater
arachonoid mater
pia mater

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2
Q

Pia Mater

A

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

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3
Q

dura maatter

A

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.

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4
Q

where is the Arachnoid Mater

A

beneath the dura matter

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5
Q

Arachnoid Mater

A

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

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6
Q

what is the role of the cereobraibrinal fluid

A

cushion and protect the brain and spinal cord

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7
Q

subarachnoid space

A

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

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8
Q

what are the psychial support of the cns

A

cranium and verterbal collum
mengines
CSF

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9
Q

what are the spinal mengines

A

dura matter
arachonid matter
pia matter
verterbra
spinal cord

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10
Q

what % of the brain is gray matter

A

40% - cell bodies ,dendrites, axon terminals

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11
Q

what % of the brain is white matter

A

60%- axons

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12
Q

in the white matter of the brain what are the fibres

A

projection fibres
assosication fibres
commissural fibres
corpus callosum

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13
Q

what is the role of projection of fobres

A

connects cerebal cortex with lower levels of brain or spinal cord

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14
Q

what is the role of assosication fibres

A

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

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15
Q

what is the role of commisural fibres

A

connects same cortical regions on 2 sides of the brain

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16
Q

what is the role of the corpus collsum

A

primary location of commissural fibers

17
Q

summarise the spinal cord

A

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

18
Q

what are the spinall nerves called in the spine

A

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

19
Q

what is dermatomes?

A

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

20
Q

what are the 2 functional halves gray matter

A

dorsal: sensory functions
ventral: motor functions

spinal nerves are dixed

21
Q

summarise the spinal cord cross section:

A

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

22
Q

Gray matter in the cross section:

A

H shaped central region and contains neuronal cell bodies and dendrites

23
Q

white matter in the cross section

A

surrounds gray matter and is composed of myelinated axons

24
Q

central canal in cross section

A

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

25
Q

spinal nerves in cross section

A

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

26
Q

Dorsal root Ganglion (DRG) in cross section

A

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

27
Q

Funcitonal roles in cross section

A

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

28
Q

spinal reflexes and the afferent eurones

A

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

29
Q

what does the white matter tracts …

A

ascedning
descedning

30
Q

strech reflex is a quick

A

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.

31
Q

ascedning tract

A

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

32
Q

descedning tract

A

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

33
Q
A

Limbic system (2 decks)

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