If the suprachiasmatic nucleus (SCN) of a hamster is lesioned, the hamster will If the suprachiasmatic nucleus (SCN) of a hamster is lesioned, the hamster will shift its activity cycle to a longer time period (e.g., 25 hours) continue to exhibit a relatively normal pattern of activity cycles exhibit a random pattern of activity cycles, especially if kept in constant dim light lose interest in running on a wheel