[ adv ] in a causal fashion <adv.all> causally efficacious powers
Causally \Caus"al*ly\, adv. According to the order or series of causes; by tracing effects to causes.
Causally \Caus"al*ly\, n. (Mining.) The lighter, earthy parts of ore, carried off washing.
There is no neurochemical or neurophysiological change causally linked to heavy gambling, only changes (such as increased adrenaline, rise in blood pressure, etc.) that occur as a consequence of the excitement of the gambling.