Motugenic is a term for a system where all/most headmates can sense all/most other headmates' emotions. This is generally, but not always, a median system.
Motuses are headmates that can feel other headmate's emotions; this is not necessarily the entire system. A motus can be one headmate who always knows what others are feeling, & there can also be Motus Cliques, a group of headmates that can feel each other's, and only each other's, emotions. Motus Cliques are almost always friends.
The term originates from "motus", the Latin word for "emotion".