Living Anatomy

Living Anatomy is a Fallout 2, Fallout: New Vegas, J.E. Sawyer's Fallout Role-Playing Game, and Fallout Tactics Perk.

Fallout 2 and Fallout Tactics
You have a better understanding of living creatures and their strengths and weaknesses. You get a one-time bonus of +10% to Doctor (+20 Skill Points in unpatched Fallout 2) and you do +5 damage to living creatures.

Fallout: New Vegas
Living Anatomy allows you to see the Health and Damage Threshold of any target. It also gives you a +5% damage bonus against Humans and non-feral Ghouls.

J.E. Sawyer's Fallout Role-Playing Game
You have a better understanding of the strengths and weaknesses of living creatures. You gain a +2 damage bonus against all living creatures and when you score a hit against living creatures, your attack roll is increased by 5 for purposes of determining critical hits.