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Title: Cognition and Neuroscience : Object Recognition
Description: This is a summary of the how our brains recognise and processes objects (object recognition). Typically a cognition and neuroscience course. I did this course in my second year of university, the course was NeuroPsychology. This summary is as simplified as can be without omitting important details.
Description: This is a summary of the how our brains recognise and processes objects (object recognition). Typically a cognition and neuroscience course. I did this course in my second year of university, the course was NeuroPsychology. This summary is as simplified as can be without omitting important details.
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Banich & Compton (2011) Cognitive Neuroscience, 3
Rd
Jamie Ward (2010)
...
Wadsworth Cengage
...
Psychology Press
nd
M Gazzaniga, R Ivry & G Mangun (2002) Cognitive Neuroscience 2 Ed
...
Dorsal is responsible for “where”, whereas ventral is responsible for “what”, ie ventral parts
of the brain have receptive fields
...
Certain
characteristics of cells in these areas seem to be especially adaptive for object recognition
...
A large receptive field is necessary to allow for objects to be recognized
regardless of its size
...
(Figure-ground
separation)
•
Is located in the occipital, occipito-tempral and temporal regions of the brain
•
Posterior – simple ; anterior- complex
Deficits in object recognition:
Visual agnosia is an inability to recognize objects within the visual modality that cannot be
explained by other causes such as memory or general mental decline
...
The word
“agnosia” means “without knowledge”
...
They differ in that apperceptive agnosia is the
inability to “see” a given object
...
They also fail at line orientation so battle to distinguish words as a whole
...
Damage
to the occipital lobe is associated with this type of agnosia
...
However, they would be unable to draw the
same image from memory
...
For example, they may
identify and copy a picture of an anchor, but when shown it later would be unable to recall its
context
...
Also, apperceptive cannot copy an image
but associative can
...
Theoretrical issues in Object Recognition:
•
Sparse v Population Coding
•
Invariance in Recognition
•
Feature-based v Configural Coding
•
Category Specificity
Prosopagnosia: This is another visual disorder which refers to an individual who is
unable to differentiate or recognize faces
...
Most cases of agnosia are
acquired, they are caused from some type of brain damage, however in some cases
prosopagnosia can be something a person is born with
...
population coding:
Sparse coding refers to a specific group of cells firing for a specific object
Title: Cognition and Neuroscience : Object Recognition
Description: This is a summary of the how our brains recognise and processes objects (object recognition). Typically a cognition and neuroscience course. I did this course in my second year of university, the course was NeuroPsychology. This summary is as simplified as can be without omitting important details.
Description: This is a summary of the how our brains recognise and processes objects (object recognition). Typically a cognition and neuroscience course. I did this course in my second year of university, the course was NeuroPsychology. This summary is as simplified as can be without omitting important details.