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neuro - block 2 > neuroimaging + language (dr driscoll) > Flashcards

neuroimaging + language (dr driscoll) Flashcards

1
Q

EEG measures

A

post-synaptic potentials

100s-1000s of neurons

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2
Q

how is the spacial resolution of EEGs

A

not so good (~2cm)

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3
Q

what is the temporal resolution of EEG

A

milliseconds

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4
Q

what does a CT/CAT scan measure

A

electromagnetci conduction

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5
Q

how is the spacial resolution of CT scans

A

mid asf (~2mm)

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6
Q

what is the temporal resolution of CT scan

A

none (snapshot image)

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7
Q

what do MRIs measure

A

atom ‘wobble’ from radio waves

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8
Q

how is the spacial resolution of MRIs

A

great! (up to 100 nanometers)

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9
Q

what is the temporal resolution of MRIS

A

none. (snapshot image)

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10
Q

what does a PET scan measure

A

radioisotope decay (FDG)

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11
Q

how is the spacial resolution of a PET scan

A

not great, (~1cm)

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12
Q

what is the temporal resolution of PET scans

A

seconds

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13
Q

what do fMRIs measure

A

changes in oxygination

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14
Q

how is the spacial resolution of fMRIs

A

good (~1-2mm)

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15
Q

what is the temporal resolution fMRIs

A

~1 sec

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16
Q

what does DTI stand for

A

diffusion tensor imaging

17
Q

what does DTI measure

A

water flow (white matter)

18
Q

how is the spacial resolution of DTIs

A

good (1mm)

19
Q

what is the temporal resolution of DTIs

A

none. (snapshot image)

20
Q

T1 weighted image

A

T1 = type of MRI image

gray matter = gray
white matter = white
fluid = black

21
Q

T2 weighted image

A

T2 = type of MRI image

gray matter = light gray
white matter = dark gray
fluid = white

22
Q

which type of neuroimaging technique can measure functional conectivity

A

fMRI

23
Q

what connects broca’s area and wernicke’s area

A

arcuate fasiculus

24
Q

speaking a heard word (process)

A
  1. info about sound is analized in primary auditory cortex
  2. wernicke’s area analizes the sound info to determine the word(s) that were said
  3. info from wernicke’s area is transmitted to broca’s area through the arcuate fasiculus
  4. broca’s area forms a motor plan to repeat the word and sends that to motor cortex
  5. motor cortex implements broca’s area plan (manipulating larynx and related structures to speak word)
25
Q

speaking a written word (process)

A
  1. visual cortex analizes the image and transmits info about image to angular gyrus
  2. angular gyrus decodes image info to recognize word(s) and associates this visual form with the spoken form in wernicke’s area
  3. info about the word is transmitted via the arcuate fasiculis to broca’s area
  4. broca’s area forms motor plan to say appropriate word(s) and transmits plan to motor cortex
  5. motor cortex impliments broca’s area plan and speaks word(s(
26
Q

prosody (def)

A

emotional aspects of speach (tone, loudness, etc)

27
Q

damage to the arcuate fasiculus is called BLANK

A

conduction aphasia

28
Q

symptoms of conduction aphasia (2) + can they still comprehend

A
  1. fluent but nonsensicle production
  2. cannot repeat spoken words
  3. CAN comprehend speach
29
Q

injury to area surrounding brocas area is called

A

transcortical motor aphasia

30
Q

symptoms of transcortical motor aphasia

A
  1. non-fluent verbal output
  2. effortful, short speach with lack of grammer
  3. CAN REPEAT
31
Q

injury to area surrounding wernickes area is called

A

transcortical sensory aphasia

32
Q

symptoms of transcortical sensory aphasia

A
  1. difficulty naming objects
  2. difficulty distinguishing words
  3. ALL SYMPTOMS OF wernickes aphasia BUT CAN REPEAT
33
Q

symptoms of wernicke’s aphasia (5)

A
  1. pure word deafness (cant distinguish/identify words or stop consinents)
  2. comprehension problem (cannot understand meaning of words)
  3. cannot convert meaning into words (cat = hat, bed = cake) + neologisms (making up words)
  4. syntactically correct but empty sentances
  5. unaware of deficit
34
Q

symptoms of broca’s aphasia (5)

A
  1. problems articulating speach
  2. anomia (problems with sequencing words)
  3. agrammatism (not good at parts of speach, order of speach, sytax, etc)
  4. speach is labored and slow
  5. aware of deficit + comprehension is intact

neuro - block 2 (9 decks)

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