Neuropsychological testing: 2 Case studies
The following 2 cases illustrate the pivotal role of neuropsychological testing in formulating an accurate differential diagnosis, and facilitating improved outcomes.
Case 1
A veteran with PTSD and memory complaints
Mr. J, age 70, is a married man who spent his career in the military, including combat service in the Vietnam War. His service in Vietnam included an event in which he couldn’t save platoon members from an ambush and death in a firefight, after which he developed PTSD. He retired after 25 years of service.
Mr. J’s psychiatrist refers him to a neuropsychologist for complaints of memory difficulties, including a fear that he’s developing Alzheimer’s disease (AD). Because of the concern for AD, he undergoes tests of learning and memory, such as the CVLT-3, the Brief Visuospatial Memory Test-Revised, and the Logical Memory subtest from the Wechsler Memory Scale–4th Edition. Other tests include a measure of confrontation naming, verbal fluency (phonemic and semantic fluency), construction, attention, processing speed, and problem solving. In addition, a measure of psychiatric and emotional functioning is also administered (the MMPI-2-RF).
The results determined that Mr. J’s subjective experience of recall deficits is better explained by anxiety resulting from the cumulative impact of day-to-day emotional stress in the setting of chronic PTSD.25 Mr. J was experiencing cognitive sequelae from a complicated emotional dynamic, comprised of situational stress, amplified by coping difficulties that were rooted in older posttraumatic symptoms. These emotions, and the cognitive load they generated, interfered with the normal processes of attention and organization necessary for the encoding of information to be remembered.26 He described being visibly angered by the clutter in his home (the result of multiple people living there, including a young grandchild), having his efforts to get things done interrupted by the needs of others, and a perceived loss of control gradually generalized to even mundane circumstances, as often occurs with traumatic responses. In short, he was chronically overwhelmed and not experiencing the beginnings of dementia.
For Mr. J, neuropsychological testing helped define the focus and course of therapy. If he had been diagnosed with a major neurocognitive disorder, therapy might have taken a more acceptance and grief-based approach, to help him adjust to a chronic, potentially life-limiting condition. Because this diagnosis was ruled out, and his cognitive complaints were determined to be secondary to a core diagnosis of PTSD, therapy instead focused on treating PTSD.
Continue to: Case 2