MCT questions (neuropsychology)

?
who studied VSA and P DF?
Milner 1991
1 of 62
what was special about patient DF?
visuomotor intact
2 of 62
Patient DF... why did she get hypoxia?
CO Poisoning
3 of 62
how did she recognise shapes?
through surface properties and texture
4 of 62
how was her visuomotor okay?
she could pick up objects even at different angles that was comparable to controls
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what was she better at?
real-object identification
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what was random?
perceptual matching
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what couldn't she recognise?
simple drawings and shapes
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what else couldn't she recognise
geo patterns
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what was high?
spatial fine frequency
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what couldn't she identify ?
orientation
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Who studied visual streams?
ungerleider and mishkin 1982
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what was their argument for cortical tissue?
essential for vision and extends beyond the visual cortex
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what is the visual cortex also known as?
striate cortex
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what was their case based around?
Prosopagnosia
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Ungerledier and
Mishkin 1982
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occipitotemporal projection/ pathway interconnects:
striate, prostrate and inferior temporal areas (VS)
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occipitaltemporal projection/ pathway interconnects:
striate and inferior parietal areas (DS)
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carried out lesion studies in ?
monkeys
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found these 2 anatomically distinct pathways also have
distinct functions
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ventral stream:
object recognition e.g. what
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dorsal stream
visual recognition e.g. where and recognition of location of objects
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VS: vision for
perception
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DS: vision for
action
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Prosopagnosia is the
inability to recognise previously recognisible faces
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Bruyer 1983 - spell in hospital following
cardiac problems
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Bruyer found bilateral
lesions to occipital lobe regions
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there was no
low level deficit
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could differentiate between
elements of the face
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able to match faces from
different viewpoints
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inability to match
representation of the face to recognition for the face
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often individuals with prosopagonsia also have
object agnosia
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DeRenzi et al. 1991 and Patient VA showed that
face recognition was special as VA had n problem with identification of objects
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Ramon et al 2010 said P could result from what kind of processing?
selective deficit of holistic or configural processing
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what is holistic processing?
ability to perceive multiple elements in integrated manner
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why might P be holistic/ configural
because we perceive faces through multiple of cues so may be inability to bind/ integrate cues
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what task was used to identify this?
probe face task
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the control subjects were more accurate at matching? (probe task)
whole face over part face
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patient PS was impaired on (probe task)
both tasks
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What is a disadvantage of PET scans?
poor temporal resolution - most scans require 30 seconds +
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What is a disadvantage of PET scans with regards to image?
cannot be used to image more fine grained aspects of cog activity
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what is a disadvantage with cost in PET scanning?
the high cost of cyclotrons needed to produce radioisotopes for PET scanning
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What is limiting due to radioactive material in PET scans?
number of safe scans performed
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what needs to be averaged together to get a good PET image?
scans from different people
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what can the averaging of PET images do?
reduce resolution of image
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How many mechanisms may be involved in recovery from brain damage?
5
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mechanisms involved; initialism
D2CRS
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what are the 2 D's involved in recovery from brain damage?
disinhibition, denervation supersensitivity
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what is the C involved in recovery for brain damage?
compensatory zones
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what does the R stand for in brain damage recovery?
regeneration
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what does the S stand for in brain damage recovery?
sprouting
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MRI?
magnetic resonance imaging
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the brain consists of (for MRI)
water molecules
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water has how many hydrogen/ nuclei protons
2
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what do these protons do?
spin around and act like small magnets and produce a magnetic field
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MRI depends on these protons acting as
mini magnets
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what do these mini magnets do in an MRI scan?
interact and line up
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what do different types of brain tissues/ structures have?
different types of magnetic properties
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scan data can be computer processed to do what?
generate visual images of the brain
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advantages of MRI?
non-invasive and produces good image resolution of up to 1-2 mm
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problems with claustrophobia and MRI?
can produce anxiety and is also noisy
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problems with obtaining a good image so close to cavities?
it can be problematic as it can distort the pictures
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Other cards in this set

Card 2

Front

what was special about patient DF?

Back

visuomotor intact

Card 3

Front

Patient DF... why did she get hypoxia?

Back

Preview of the front of card 3

Card 4

Front

how did she recognise shapes?

Back

Preview of the front of card 4

Card 5

Front

how was her visuomotor okay?

Back

Preview of the front of card 5
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