Bava Kamma 87: Personal Injuries
A new mishnah! It spells out a good number of cases that entail paying the 5 compensations, and when one would be exempt, including what happens when one strikes a parent and does or does not cause a bruise. Also, the Gemara here - beginning with one who injures a minor daughter (vs. an adult son), and carrying through to a trust for a son... and other monetary support.