The following post is about AU1 – inner brow raiser, driven by the medial part of the frontalis muscle. It covers: anatomiset vaihtelu, yhteinen virheetja tarjoaa puhdas viitteet. 

 

Mitä minä olennner Brow Raiser?

Sisäinen kulmakarvan kohottaja, tai AU1, on Kasvojen toiminnan koodausjärjestelmä (FACS) action unit (AU). Its function is to raise the medial brow/forehead area, and its action is triggered by the contraction of the medial region of frontalis. It can difficult find clean references sisäinen otsan kohottaja. When building FACS references, many sources fail to:

1. Find actors who can voluntarily trigger their medial frontalis without also contracting the lateral area of frontalis or corrugator supercilii. 
2. Suuntaa mallit oikein to perform medial frontalis contraction.

In our everyday lives, most of us can effortlessly raise our inner brows without thinking twice; however, when commanded to, many people struggle to isolate this motion.

FACS-viitteet ja väärää tietoa

I recently (2020) critiqued a set of FACS shapes for a client and noticed his sisäinen otsan kohottaja muoto oli jonkin verran aaltopahvin (alkaen otsanlaskija) erehdyksessä sekoittunut.

Client’s Inner Brow Blendshape + My Notes:

Aaltopahvin lisääminen sisäinen otsan kohottaja on hyvin yleinen virhe. Tämä yleisyys johtuu osittain siitä, että: Hyviä referenssejä on vaikea löytää!

Even my client – an established industry artist with a great portfolio and CV – unknowingly added corrugator features to his model, because he trusted a tainted reference. The reference he used was from a prominent anatomy and facial expression book: Kasvojen ilmeiden anatomia. Many art students and professionals use this textbook. It is a great textbook, but some of its FACS shapes are inaccurate.

Reference used by client:

See the vertical and wavy lines in the center of the forehead in the images below? Those vertical lines are from a brow knitting muscle known corrugator supercilii.

To view some clean examples of medial brow raising, observe the GIFs below. Read about the primary and secondary effects of sisäinen otsan kohottaja sekä siitä, miten sen ominaisuudet voivat vaihdella yksilöiden välillä.

Clean AU1 - Inner Brow Raiser Esimerkkejä

example i

example ii 

For more information katso: The Secret Life of Inner Brow Raiser (Salainen elämä).

For a full and structured FACS deep dive, see my online course, the: FACS-opintojakso.