Oropharyngeal dysphagia, or OPD, is an impairment of the oral or pharyngeal phases of the swallow. This can impair muscle movements and coordination of the mouth, such as the lips, tongue, jaw, cheeks, palate, and also muscles of the pharynx and the entry to the airway.
"Cerebral palsy is primarily a motor impairment so it's really important to look at what the child’s motor function is. Are they developing on the trajectory of a child who has cerebral palsy or are they developing as we would expect a baby to develop? "
To give you an idea about genetic variation between each of us, there are about three million differences in our genetic code. They go to influence the color of our hair and the color of our eyes, the way we walk.