<qa>  How many children will be randomly assigned to a hyperbaric oxygen treatment group or hyperbarThe study proposed herein is a randomized, double blind study to evaluate the therapeutic effectiveness of HBO in children ages 3-8 years with a diagnosis of spastic CP. Ninety-four children will be randomly assigned to either a hyperbaric oxygen treatment group or hyperbaric air treatment HBA group. Each group will receive 40 dives of 60 minutes duration each at 1.5 atmospheres of pressure ATA the HBO group receiving 100 oxygen, and the HBA group receiving an air mixture containing 14 oxygen, which simulates 21 oxygen at 1.5 ATA. 