What exactly is perivintriculoleukomalacia ?

Infant brain injury: Periventricular leukomalacia is a brain injury that can occur in infants that kills bits of brain tissue surrounding the ventricles.

PVL is caused by : lack of blood flow & oxygen to the white matter around the ventricles of the brain, an area most susceptible to damage around the end of the 2nd trimester. Severity of impairment varies widely, but isn't seen right away. Start Early Intervention therapy at 4-6 weeks as "Early Prevention" for optimal outcome. See: http://cerebralpalsy.org/about-cerebral-palsy/cause/periventricular-leukomalacia/