The following post is about AU1 – inner brow raiser, driven by the medial part of the frontalis muscle. It covers: anatomik varyasyon, ortak hatalarve şunları sağlar temiz referanslar. 

 

Ben nenner Kaş Kaldırıcı?

İç kaşlarını kaldır, veya AU1, bir Yüz Eylem Kodlama Sistemi (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 iç kaş kaldırıcı. 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. Modelleri doğru şekilde yönlendirin 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 Referansları ve Yanlış Bilgiler

I recently (2020) critiqued a set of FACS shapes for a client and noticed his iç kaş kaldırıcı şekil biraz oluklu vardı (gelen kaş düşürücü) yanlışlıkla karıştırılmıştır.

Client’s Inner Brow Blendshape + My Notes:

Corrugator'a ekleme iç kaş kaldırıcı çok yaygın bir hatadır. Bu yaygınlık kısmen şundan kaynaklanmaktadır: İyi referanslar bulmak zor!

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: Yüz İfadelerinin Anatomisi. 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 iç kaş kaldırıcı özelliklerinin bireyler arasında nasıl değişebileceğinin yanı sıra.

Temiz AU1 - İç Kaş Kaldırıcı Örnekleri

example i

example ii 

For more information Bak: İç Kaş Kaldırıcının Gizli Yaşamı.

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