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No. Other things also improved. Tiny babies that had zero chance of survival are now nearly routinely saved. Also, those with umbilical cord mishaps or whatever birth traumas nature deals out, also survive. A new problem is that these saved kids are not unscathed. Neurological incompleteness direct or by damage from lack of cardiac & great vessel readiness leaves us with neurological damage. The damage of imbalanced circuits early on isn't obvious as even the imbalances are struggling to exist. As health is acquired, the neural wiring – good and bad - starts to manifest and assert itself. Alas, what manifests isn't the norm. Some muscles get ignored. Others get stimulated nonstop. Infinite circuits with infinite ways the brain can be irregular leaves us with infinite possible mixtures of neurological woe. There are just too many to assign all the potential individual names. Collectively, we just call all of it cerebral palsy. Just keep in mind that this very old name, cerebral palsy, is just that, a very old name. Often, the abnormality we deal with in “CP” is neither cerebral nor a palsy, but that name gets the paperwork done. Nobody wants the monumental alternative naming of infinite deficits and excesses. Even so, the weakest links in the chains of building neurological function as well as vascular and metabolic support are the breaks we see most often. From that, are derived the KINDS of CP that do get notice. The kinds, by quality : spastic, dystonic, rigid, athetoid, choreiform and others are by almost 1:1 related to specific injury cause types. Discrete damage to this brain location or that location, such as by bleeding, insufficient blood flow pressure, metabolic abnormality, oxygen absence, and so on, causes discrete kinds of localization of abnormality... flavors, that we recognize by what body parts manifest the injury most. These get awkward Latin or Greek labels showing that doctors can count to 4 in Latin or Greek.