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awareness deficits after anoxia

F. Frank LeFever flefever at ix.netcom.com
Mon Jun 16 21:27:52 EST 1997

You seem knowledgeable about the anatomy and at least one (not mass
marketed) procedure for evaluating the frontal aspect, soo I am a
little puzzled about your question.  Do you doubt the obvious, or is it
that you are simply throwing out a challenge (a thought experiment?) to

If you are not familiar with the literature on anosagnosia  (a better
search term than "unaware of deficits", unfortunately!), check it out. 
The evidence bearing on anatomical correlates (e.g. right hemisphere
stroke) to would seem to be relevant to the "organic" explanation.

What would you suspect as a "psychological" basis?  This might suggest
what the "psych" tests would focus on.

Frank LeFever
New York Neuropsychology Group 

In <33A60A1E.3D39 at psycho1.bham.ac.uk> JAMESR
<JAMESR at psycho1.bham.ac.uk> writes: 
>I am working with a patient who has bilateral orbital frontal and 
>temporal lesions from carbon monoxide poisoning. He is densely
>and has many cognitive deficits but seems unaware of (or unwilling to 
>admit) to these deficits. For example, after failing a single digit 
>addition task, he will reply "perfect" when asked to grade his 
>performance. He does not confabulate, but gives bizarre answers to the

>Shallice Cognitive Estimation task e.g. an estimate of 6 feet for the 
>height of a tall building.
>Awareness deficits are apparently quite common after brain injury, but

>can anyone recommend, or think of, any tasks that would help to decide

>whether there is a psychological or "organic" basis to this awareness 
>deficit? Thanks, Bob James

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