[Oro-facial behavior of smokers]

A preliminary study was conducted on twenty patients to study the oro-facial behaviour when smoking a cigarette. Such a study was realized with an electromyograph, an integrator and a magnetoscope which were combined. Two types of smokers were found: "a correlated" type for whom time and degree of activity of the different muscles had a tendency to become similar; in the "dissociated" type the two preceding parameters had a tendency to move away from each other, at least for certain muscles. Each smoker presented a very stable behavioural motor pattern.