Un aparato que se coloca junto a la cama y que imita la salida del sol parece aliviar los síntomas en afectados por depresión invernal, asociada por la menor luz solar de esta estación, según explican médicos de la Universidad de Columbia en Nueva York.
Otro método que también parece útil es la ionización negativa del aire. Ambos procedimientos naturalistas se han evaluado en casi un centenar de pacientes y los resultados se publican en el "American Journal of Psychiatry".
La mejoría sintomática fue del 50% entre los pacientes que emplearon el aparato que imita la luz del amanecer y del 48% en los que utilizaron el dispositivo de ionización del aire a altas dosis.
American Journal of Psychiatry 2006;163:2126-2133
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