Identity in one's body

Locke does not seem wrong to think we gain (at least a sense of) identity over time through psychological continuity. But that can't be the whole story - and indeed for some it is no part at all (think of Amnesia or Dementia). There is surely something in the way the body itself stores memory and trauma that indicates a unified (though by no means fixed) self over time. The posture of an individual carries their story to its micro-details.