If I interpreted your concern correctly, and I guess I did, it results hard to believe how can a child pass through an experience like that without suffering any brain damage?
I am working in a medium-class Clinic, where one would expect to find well educated or at least, well informed people. Mothers ready to impart breast-feeding. Responsible parents, keeping vigil 24 hours a day monitoring their children security, but unfortunately reality is quite different. Not only health care ignorance, but also negligence, sometimes hazardous. We had many cases of newborns falling down from theirs mothers' bed, because they felt asleep while holding their baby on the unprotected bedside.
Sometimes one finds a toddler with a respiratory illness, cyanotic in his/her baby-sit with both parents happy unaware sleeping as if they where in a hotel on vacations. Very often after many weeks interned both, mother and child, go home returning after few days in a worsen state because prescriptions where not followed at all.
I wonder how can a child survive such conditions. I remember a night two month ago, a college holding the toddler in her arms, running one flour downstairs to the Neonatology Unit, after finding him in apnea while his mother slept. (We suffer an epidemic of bronchiolitis on last winter). However, after four months of working in pediatrics I can witness no death. And for that my companions have a simple and irrational explanation:
"There must be an Angel caring for every child".
In the best case, we can assume that nature might have very important reasons to assure most children survival.
Although we are unable to grasp with profoundness such reasons, we can accept the existence of an invisible guidance that sometimes shakes us to move, in situations like those that you experience with your infant.