EVANSTON, Ill. (AP) - Ameer Abdullah had four 1-yard touchdown runs and quarterback Tommy Armstrong Jr. scored on a 16-yard reception, leading No. 19 Nebraska to a 38-17 victory at Northwestern on Saturday night.Abdullah finished with 146 yards on 23 carries as the Cornhuskers (6-1, 2-1 Big Ten) bounced back from a 27-22 loss at Michigan State.