The following post is about AU1 – inner brow raiser, driven by the medial part of the frontalis muscle. It covers: 解剖学的 変化, 凡庸 誤りを提供する。 潔い 参考文献. 

 

私とはナー・ブロウ・レイザー？

インナーブロウレイザー。 またはAU1は フェイシャルアクションコーディングシステム (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 前頭葉. It can difficult find clean references 眉をひそめる。 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. モデルを適切に演出する 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の参考文献と誤った情報

I recently (2020) critiqued a set of FACS shapes for a client and noticed his 眉尻 形はコルゲーターを持っていた 眉下手)が間違って混ざっていました。

Client’s Inner Brow Blendshape + My Notes:

コルゲーターの追加 眉尻 は非常に一般的な間違いです。この共通性には一因があります。 良い参考文献はなかなか見つかりません

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: 顔の表情の解剖学. 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 眉尻 と同様に、その特徴が個人によってどのように異なるかについても説明します。

クリーンAU1 - インナーブロウレイザーの使用例

example i

example ii 

For more information を参照してください。 インナーブロウライザーの秘密の生活.

For a full and structured FACS deep dive, see my online course, the: FACSセッション.