1. A sensor positioning device for an oximeter of the type comprising an emitter having at least one light source, a receiver having at least one photosensor, and means for monitoring the receiver to measure selected body parameters, said device comprising: a headband configured to rest on the head of a subject; means for mounting the emitter and the receiver to the headband in side-by-side relationship such that both the emitter and the receiver are directed toward the forehead of the subject; means, included in the mounting means, for resiliently biasing the emitter and receiver into contact with the forehead of the subject; a breath sensor; and means for mounting the breath sensor to the headband to position the breath sensor to respond to air exhaled by the subject.