Studies were performed following sedation administered in the ward for difficult behaviour.
SPECT studies performed following infusion of technetium HMPAO with mental stimulation and these of low statistical quality but appear to show mildly but extensively reduced perfusion to the frontal lobes, particularly along the mesial surfaces. Elsewhere perfusion appears normal, in particular, the posterior cingulate and precuneus hot zones are detected hence making early Alzheimer's disease unlikely. There is also hypoperfusion of the caudate heads bilaterally which can be seen Huntington's chorea, however, perfusion of the other basal ganglia, brainstem and cerebellum are normal.
Impression: Overall impression would favour a frontal impairment or dementia as the cause of the patient's behaviour.