my friends 8 month old baby has just had some blood work done , and the doctor told her that the baby has high pck levels ( 270). he didnt give her too much other information her baby seems overall healthy ,( eating well and gaining weight) but still can not hold his head up , or sit up. He also was diagnosed with nystagmus , however she has not been given futher information. what could having high Cpk levels mean? and is there a possibility that its connected to the nystagmus?