fuguist

noun

1. a musical composition for a definite number of parts or voices, in which a subject is announced in one voice, imitated in succession by each of the other voices, and developed contrapuntally
2. Psychiatry a state of psychological amnesia during which the subject seems to behave in a conscious and rational way, although upon return to normal consciousness he cannot remember the period of time nor what he did during it; temporary flight from reality