Subsequent to the weight propagation, {HEAD ~ the weights} can be normalized, thereby preventing entrapment in {TAIL ~ a local optimum} 
Subsequent to the weight propagation , { HEAD ~ the weights } can be normalized , thereby preventing entrapment in { TAIL ~ a local optimum }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL