Cognitive Impairment After Brain Injury or Stroke

Much of what people describe as a memory problem is an attention problem — information never fully taken in cannot be recalled. Separating the two changes the treatment, because attention responds better to training than memory does.

Processing speed, planning, self-monitoring and awareness of one's own difficulties are frequently affected alongside. The last of these is the hardest to treat, because someone who does not perceive the problem does not engage with treatment for it.

Cognitive performance after brain injury collapses when tired, and the resulting variability is regularly mistaken for a fixed deficit. An assessment done at the end of a long day underestimates ability, sometimes considerably.

Depression and anxiety impair attention and memory directly and are common after neurological events. Assessing cognition without addressing sleep, fatigue and mood produces a misleading result.

Attention training after traumatic brain injury, external compensatory memory strategies, and structured problem-solving training for executive difficulty all have reasonable support 1. For neglect after right hemisphere stroke, expert reviews recommend visual scanning training 1. A Cochrane review, however, found that no rehabilitation approach has yet been proven to improve everyday independence 5.

Commercial brain training programmes improve performance on their own games and transfer poorly to daily life 2. We use them as one component at most, never as the programme.

Improvement on clinic tasks transfers badly to a workplace or a household. Training happens with the patient's own diary, their own kitchen, their own work tasks, or in close simulation of them.

Family are involved because the strategies only survive if the people around the patient understand and support them.

Standardised assessment of attention, memory, processing speed and executive function, repeated over time. A single score describes a moment; the trend is what distinguishes recovery from decline from a bad day.

The baseline also identifies which specific process is failing, because a memory complaint frequently turns out to be an attention problem — and the two need different treatment.

Some functions recover with training and some are better managed with strategies and external aids. A calendar system, a fixed place for keys, a written routine — these restore independence even where the underlying process has not improved.

People often resist this as an admission of failure. It is the opposite: compensation is what returns function fastest, and it runs alongside restorative work rather than replacing it.

The evidence after stroke is limited. A Cochrane review of six trials found that attention training may improve divided attention — keeping track of two things at once — immediately after treatment, but it is uncertain whether the effect lasts, and there was no convincing effect on daily activities, mood or quality of life 3.

For memory, a Cochrane review of 13 trials found that people reported better memory in the short term but not at later follow-up, with no effect on memory tests or on daily function 4. This is why goals are set in terms of everyday tasks and measured there, and why strategies are practised in the places they will be used.