Facial Analytics Glossary — FACS & Action Units | Mental Edge

Facial Analytics Glossary20+ plain-English definitions covering FACS, individual Action Units, micro-expressions, affective computing, and the core concepts behind facial emotion analytics.

Facial Action Coding System (FACS)

Action Unit (AU)

Micro-Expression

Macro-Expression

AU6 — Cheek Raiser

AU12 — Lip Corner Puller

AU4 — Brow Lowerer

AU1 — Inner Brow Raiser

AU15 — Lip Corner Depressor

Seven Universal Emotions

Facial Landmark Detection

Affective Computing

Emotion Recognition Software