Furthermore, the pineal gland is a hypothetical candidate for producing a mind's eye; Rick Strassman and others have postulated that during near-death experiences (NDEs) and dreaming, the gland might secrete a hallucinogenic chemical N,N-Dimethyltryptamine (DMT) to produce internal visuals when external sensory data is occluded.[8] However, this hypothesis has yet to be fully supported with neurochemical evidence and plausible mechanism for DMT production.