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Neuro > Definitions > Flashcards

Definitions Flashcards

1
Q

what makes up white matter

A

myelinated axons

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2
Q

what makes up grey matter

A

cell bodies - no myelin sheaths

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3
Q

what are oligodendrocytes

A

myelinated axons in CNS

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4
Q

what are Schwann cells

A

myelinated axons in PNS

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5
Q

what is a tract

A

location of a pathway - axons gather in tracts

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6
Q

what is a commissure

A

tract connecting 1 hemisphere to another - cross midline

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7
Q

what is a lemniscus

A

narrow strip of fibres

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8
Q

what does funiculi mean

A

rope/ cord

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9
Q

what is a fasciculus

A

bundle

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10
Q

what is a capsule

A

sheet of white matter fibres that border a nucleus of grey matter

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11
Q

what is a column

A

longitudionally running fibres that separate other structures e.g. dorsal column

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12
Q

what is a cortex

A

Laminated grey matter on outside of brain

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13
Q

what is a nuclei

A

collection of nerve cell bodies within CNS

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14
Q

what is a ganglia

A

collection of nerve cell bodies outside CNS

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15
Q

what is the difference between nuclei and ganglia

A

collection of nerve cell fibres within CNS (nuclei) v outside CNS (ganglia)

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16
Q

what are afferent fibres

A

axons taking information towards CNS - sensory

17
Q

what are efferent fibres

A

axons taking information to another site from the CNS - motor

18
Q

what is reticular

A

‘netlike’; where grey/ white matter mixes

19
Q

what is a nerve fibre

A

single axon

20
Q

what is a nerve

A

bundle of fibres bound together by connective tissue

21
Q

what is a cas a experiment

A

diagnosis - some bahvioural/ physiological/ pharmacological variable is manipulated, effet on brain activity/ structure are measured

22
Q

what is a type b experiment

A

treatment

some aspect of brain structure or activity manipulated and effect on behaviour/ physiology etc measured

23
Q

what are methods of detection of brain activity

A

neurotransmitters/ beakdown products detected in CSF
more O2 so more blood = modern imaging
EEF - indication of regional brain activity

24
Q

describe the dorsal root strucutre

A

afferent
sensory
unipolar
cell bodies grouped in dorsal root ganglion
peripheral endings in sensory receptor
central processes end in dorsal horn of spinal cord

25
Q

describe the ventral root structure

A

efferent
motor
multipolar
cell bodies in ventral horn

Neuro (11 decks)

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