Neuroanatomy / Neuroimaging Flashcards

1
Q

Cerebrospinal fluid

A

clear liquid in brain and spine

produced in ventricles

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2
Q

ventricles in brain

A

produce CSF and are a series of reservoirs in brain center

store, produce, circulate CSF

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3
Q

meninges

A

layers of tissue separating skull from brain

3 layers:
Pia, arachnoid, dura

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4
Q

Dura Mater

A

outer layer of meninges

Heavy cabbage like cover

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5
Q

subdural hematoma

A

bleed below dura matter in the subdural space

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6
Q

arachnoid layer

A

2nd layer of meninges

consistency similar to spider web

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7
Q

subarachnoid hematoma

A

bleed in the space below arachnoid layer

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8
Q

pia mater

A

3rd layer of meninges

molds around the sulci and gyri of the brain

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9
Q

neurons

A

communicating cells in brain

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10
Q

glial cells

A

non communicating cells in brains - nourishing cells

support and maintain neurons

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11
Q

Synapses

A

neurons communicate via synapses

synapse = junction where electrochemical transmission between axon of 1 neuron to dendrite of another neuron

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12
Q

synaptic stimulation

A

release of glutamate from the axon in the synaptic cleft

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13
Q

glutamate binds to AMPA and NMDA receptors

A

this allows next neuron to stimulate if there is enough signal

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14
Q

influx of Na and Ca in post synaptic neuron

A

if allowed entry with enough signal - stimulates a cascade of biological reactions

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15
Q

end result of influx of na and ca in post synapse

A

now there is a stronger connection and increased response to given stimulus

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16
Q

3 parts to brain stem

A

medulla, pons, midbrain

17
Q

midbrain

A

smallest part of brainstem
elementary forms of vision/ hearing
arousal!

18
Q

pons

A

round structure btw midbrain and medulla
connects cerebellum and cerebral cortex
essential for facial movements, face sensation, hearing/ vision, eye movements

19
Q

medulla

A

merges with spinal cord creating base of brain stem
control center for involuntary reflexes (e.g. breathing, heart rate, BP, swallowing, vomiting, sneezing)
involved in many life functions - injury here is life threatening

20
Q

diencepathalon thalamus

A
sensory input passes here to higher levels of brain 
sits at top of brainstem below cortex 
many nuclei 
all senses except smell relay here 
injury causes wide range of symptoms
21
Q

limbic system

A

deep brain structure
controls all internal and external responses / actions
includes: hippocampus and amygdala

22
Q

Hippocampus

A

within limbic system and located in temporal lobe
controls memory
injury causes impaired memory

23
Q

Amygdala

A

part of limbic system located near hippocampus
evaluates material for emotional content
flight/ fight response

24
Q

basal ganglia

A

input from cerebral cortex - process info and send it back

  • keeps us alert
  • regulates motor activity (PD, is errors)
  • Injury causes slowness with voluntary motor neurons, loss of movement, tremor, muscular rigidity
25
Q

cerebellum

A

lower back section of the brain

  • coordinates/ modulates all body movements
  • controls direction/ rate/ force/ steadiness movement
  • injury causes problems with fine motor movements/ trajectory of movement, balance, proprioception
26
Q

cerebral cortex

A

2 hemispheres, 4 lobes, interconnected

27
Q

cerebral cortex - gyri, sulci, fissures

A
gyri= elevated ridges winding around brain
sulci= small grooves dividing brain
fissures= deep grooves dividing large regions/ lobes of brains
28
Q
frontal lobe 
function / damage
A

functions: plan, organize, problem solve, judge, impulse control, decision making, working memory
damage: change in personality, poor self awareness, decreased motivation/ goal directed behaviors, impaired attn/ STM, etc.

29
Q

primary motor cortex

A

part of frontal lobe
curves over top of the head
in charge of voluntary movement

damage - weakness or paralysis on opposite side of body

30
Q

prefrontal cortex

A

front part of frontal lobes, evaluates options, outcomes, decides best course of action - learn from consequences

injury= difficulty making decisions, organizing, prioritizing

damage for kids leads to decreased control, not immediately obvious

31
Q

temporal lobe

A
function= memory, language, hearing 
impairment= auditory processing, new learning, understanding, storing information
32
Q

broca’s area

A

Left frontal temporal lobe

33
Q

Wernicke’s area

A

Left temporal parietal lobe - speech comprehension

- damage= impaired language comprehension

34
Q

occipital lobe

A

function: visual processing, interpret visual info, recognize size, color, light, motion, dimensions
impairment: cortical blindness, agraphia, field cuts, visual movements/ agonsia, agraphica, agnosia

35
Q

parietal lobe

A

2 cortexes:
primary sensory
somatosensory

36
Q

somatosensory cortex

A

part of parietal lobe
function: sensory input integration, spatial awareness/ perception (body in space)

impairments: difficulty ID’ing sensation, location/ type (temp, pain, movement)

37
Q

primary sensory cortex

A

part of parietal lobe
functions: sensation/ perception and response to touch/ temp / pain (process sensory information)

impairments: difficulty identifying sensation - location/ type (temp, pain, movement)