You can incapacitate foes with a vise-like pinch.

Prerequisites: Combat Martial Arts, base attack bonus +4

Benefit: Before attacking, you may choose to spend an action point to use this ability. If you make a successful unarmed attack against a living creature, you may choose to forego damage in order to perform a Nerve Pinch. The target must make a Fortitude save (DC 10 + half your character level + your Strength modifier) or be paralyzed for 1d4+1 rounds.