In Graniko a sword, cutting off the helmet of, He ended up the scalp of his head in Gaza accepted a arrow in the shoulder. In Marakanda an arrow broke the bone of the tibia. In Hyrcania was hit by stone, losing his sight for several days at the battle of Issus was wounded by sword on thigh. In the land of Mallwn an arrow punched his chest and was hit by a crowbar on the head. And for all those injuries were very proud of Their thought. as proof of his prowess and his gennaiotitas.
You must answer the question for Alexander: because he had an inclination of his head to the left; Attitude that imitated the generals after his death.
So had struck with the bat in the neck during the battles against the Thracian.
The permanent damage in the neck cause him to turn around his head.