Their attention is captured by strong sensory cues, one sensation at a time. The definition of strong sensory cues is by example under the following subheadings that are organised by sensation for convenience.
Motor control is limited to the face and includes the eyes (pupils focused on a cue, blinking), nose (sniffs) and mouth. Observations around the mouth include pumping their tongue in and out of mouth, drooling, gag reflexes, salivating, sucking, pursing and retracting their lips. If they turn their head, it will probably be less than sixty degrees, total.