"Specifically, both creative and schizophrenic people tended to have a relatively low density of dopamine receptors in the thalamus. Study author Fredrik Ullén explains that this might lead to "a lower degree of signal filtering, and thus a higher flow of information" — which would in turn give rise to both "the ability of healthy highly creative people to see numerous uncommon connections in a problem-solving situation and the bizarre associations found in the mentally ill."