Components of frontal assessment battery and clinical features in patients with stroke.
Katsuya Sakai, Yuichiro Hosoi, Yusuke Harada and 2 others
PMID 40566654WHAT IT FOUND
Most stroke patients scored well on frontal lobe tests, but a small group had severe executive dysfunction.
This group showed specific deficits in behavioural control and attention tasks, yet their daily independence and general cognition scores were similar to others. Screening total scores may miss this specific impairment.
Key findings
01Factor analysis grouped the Frontal Assessment Battery (FAB) into two components: cognitive control (subscales 1, 2, 3, 5) and behavioural control (subscales 4, 6).
02A small cluster of 10 patients had significantly lower scores on behavioural control subscales and attention/executive tests compared to the majority, despite similar general cognition and functional independence scores.
03Patients in the impaired cluster had been living with stroke significantly longer than those in the larger cluster.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
The study was cross-sectional, so it cannot determine if the impaired group's longer time since stroke caused their deficits or if they are just a different subtype. The sample size was small (78 patients), and the impaired cluster contained only 10 people. Patients with aphasia, apraxia, and neglect were excluded, limiting the findings to a specific subset of stroke survivors. The study did not assess motor function or identify which specific brain regions were damaged in the impaired cluster. The Frontal Assessment Battery subscale 6 has a known ceiling effect, meaning it is generally easy, so low scores in the impaired group are notable but the test's sensitivity may vary.
Declared interests
The authors declared no conflicts of interest. Funding was not applicable.
The easy way to misread this
Do not assume that patients with normal total Frontal Assessment Battery scores or normal daily independence ratings have intact executive function. This study found a specific subgroup with severe deficits in behavioural control and attention tasks who scored normally on general cognition and functional independence measures.