A recent retrospective study of cognitive assessment in traumatic brain
injury patients found no clear pattern of cognitive ability associated
with neurological impairment.
Cognitive assessment-in the form of tests such as the WAIS (in various
versions) or the HRB (Halstead-Reitan Neurological Test Battery)-is often
administered early to traumatic brain injury patients in order to determine
cognitive functioning, diagnosis, and rehabilitation requirements. However,
this study concluded that age and employment status was more strongly
associated to cognitive assessment results than neurological findings,
such as injury severity.
The researchers looked specifically for clear patterns of cognitive impairment
-such as lowered cognitive results associated with lowered neurological
results. And there were some sub-groups of cognitive testing did show
such as association (such as processing speed). However, their overall
finding was that demographics played a stronger role in cognitive assessment
results than neurological factors.
Goldstein G, Allen DN, & Caponigro JM. A retrospective study of heterogeneity
in neurocognitive profiles associated with traumatic brain injuries.
Brain Injury. (April 2010).