daar is n verskeidenheid onderliggende oorsake, byvoorbeeld kopbeserings, wat op enige ouderdom kan plaasvind; n besering tydens geboorte, soos n suurstoftekort met geboorte; koorsstuipe, enkefalitis, meningitis of masels as kind; en metaboliese of biochemiese versteurings of wanbalanse.

there can be a variety of underlying causes such as a head injury, that can occur at any age; a birth injury, such as a lack of oxygen during birth; fever convulsions, encephalitis, meningitis or childhood measles; and metabolic or biochemical disturbances or imbalances.
