A biopsychosocial deconstruction of "personality change" following acquired brain injury.

The judgement of personality change following acquired brain injury (ABI) is a powerful subjective and social action, and has been shown to be associated with a range of serious psychosocial consequences. Traditional conceptualisations of personality change (e.g., Lishman, 1998) have largely derived from individualist concepts of personality (e.g., Eysenck, 1967). These assume a direct link between neurological damage and altered personhood, accounting predominantly for their judgements of change. This assumption is found as commonly in family accounts of change as in professional discourse. Recent studies and perspectives from the overlapping fields of social neuroscience, cognitive approaches to self and identity and psychosocial processes following ABI mount a serious challenge to this assumption. These collectively identify a range of direct and indirect factors that may influence the judgement or felt sense of change in personhood by survivors of ABI and their significant others. These perspectives are reviewed within a biopsychosocial framework: neurological and neuropsychological deficits, psychological mechanisms and psychosocial processes. Importantly, these perspectives are applied to generate a range of clinical interventions that were not identifiable within traditional conceptualisations of personality changes following ABI.