As a potentially related point - in autistic individuals there is markedly less synaptic pruning: http://www.cell.com/neuron/abstract/S0896-6273(14)00651-5?_re

As a potentially related point - in autistic individuals there is markedly less synaptic pruning: http://www.cell.com/neuron/abstract/S0896-6273(14)00651-5?_returnURL=http%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0896627314006515%3Fshowall%3Dtrue&cc=y= http://www.cell.com/neuron/abstract/S0896-6273(14)00651-5?_r...