Speech Difficulties in Down Syndrome. Down syndrome (DS) is an incurable genetic disorder that has a profound impact upon a personâs physical, mental, and social development. Children with DS have anatomical and physiological differences in the mouth and throat region that affect feeding, swallowing, and oral motor skills.
1 A gross refers to a group of 144 items (a dozen dozen or a square dozen).  A great gross refers to a group of 1728 items (a dozen gross or a cubic dozen).
Grossly normal means that the larger picture is normal. In medical terminology there is fine and gross. Gross is the larger picture which fine tends to be smaller . It has nothing to do with the term as we know it 'gross'. Actually the definition of gross in the dictionary is overall, total.