| | Blendshape browDownLeft AU4 brow lowerer | Muscle(s) & Function corrugator supercilii, depressor supercilii, procerus·Lowers the eyebrows and pulls them together. |
| | Blendshape browDownRight AU4 brow lowerer | Muscle(s) & Function corrugator supercilii, depressor supercilii, procerus·Lowers the eyebrows and pulls them together. |
| | Blendshape browInnerUp AU1 inner brow raiser | Muscle(s) & Function frontalis, medial portion·Lifts the inner portion of the eyebrows, creating a slight arch near the bridge of the nose. |
| | Blendshape browOuterUpLeft AU2 outer brow raiser | Muscle(s) & Function frontalis, lateral portion·Lifts the outer portion of the eyebrows, creating an arched shape. |
| | Blendshape browOuterUpRight AU2 outer brow raiser | Muscle(s) & Function frontalis, lateral portion·Lifts the outer portion of the eyebrows, creating an arched shape. |
| | Blendshape eyeBlinkLeft AU45 blinkAU43 eye closure | Muscle(s) & Function contraction of palpebral orbicularis oculi & relaxation of levator palpebrae superioris·AU45 briefly closes the eyelids, while AU43 closes them for longer. |
| | Blendshape eyeBlinkRight AU45 blinkAU43 eye closure | Muscle(s) & Function contraction of palpebral orbicularis oculi & relaxation of levator palpebrae superioris·AU45 briefly closes the eyelids, while AU43 closes them for longer. |
| | Blendshape eyeLookDownLeft M64 eyes down | Muscle(s) & Function superior oblique and inferior rectus·Directs the eyes downward, shifting the line of sight lower and adjusting the position of the eyelids in response. |
| | Blendshape eyeLookDownRight M64 eyes down | Muscle(s) & Function superior oblique and inferior rectus·Involves the downward gaze of the eyes, directing the line of sight lower. |
| | Blendshape eyeLookInLeft M62 eyes turn right | Muscle(s) & Function medial rectus·Directs the eyes toward the right, shifting the line of sight and adjusting the position of the eyelids accordingly. |
| | Blendshape eyeLookInRight M61 eyes turn left | Muscle(s) & Function medial rectus·Involves the leftward gaze of the eyes, shifting the line of sight to the left. |
| | Blendshape eyeLookOutLeft M61 eyes turn left | Muscle(s) & Function lateral rectus·The action of M61 involves the leftward gaze of the eyes. |
| | Blendshape eyeLookOutRight M62 eyes turn right | Muscle(s) & Function lateral rectus·Involves the rightward gaze of the eyes, shifting the line of sight to the right. |
| | Blendshape eyeLookUpLeft M63 eyes up | Muscle(s) & Function superior rectus and inferior oblique·Involves the upward gaze of the eyes. |
| | Blendshape eyeLookUpRight M63 eyes up | Muscle(s) & Function superior rectus and inferior oblique·Involves the upward gaze of the eyes. |
| | Blendshape eyeSquintLeft AU7 lid tightener | Muscle(s) & Function orbicularis oculi, palpebral portion·Narrows the eye opening primarily via the raising of the lower eyelid. |
| | Blendshape eyeSquintRight AU7 lid tightener | Muscle(s) & Function orbicularis oculi, palpebral portion·Narrows the eye opening primarily via the raising of the lower eyelid. |
| | Blendshape eyeWideLeft AU5 upper lid raiser | Muscle(s) & Function levator palpebrae superioris·Widens the eye opening by raising the upper eyelid. |
| | Blendshape eyeWideRight AU5 upper lid raiser | Muscle(s) & Function levator palpebrae superioris·Widens the eye opening by lifting the upper eyelid. |
| | Blendshape jawForward AD29 thrust | Muscle(s) & Function pterygoids (and some masseter)·Pushes the lower jaw forward, shifting its position slightly ahead from its resting alignment. |
| | Blendshape jawLeft AD30 jaw sideways | Muscle(s) & Function pterygoids and temporalis·Moves the jaw to the side (in this case, left), shifting its position laterally. |
| | Blendshape jawRight AD30 jaw sideways | Muscle(s) & Function pterygoids and temporalis·Moves the jaw to the side (in this case, right), shifting its position laterally. |
| | Blendshape jawOpen AU26 jaw dropAU27 mouth stretch | Muscle(s) & Function relaxation of masseter, temporalis, internal pterygoid; lateral pterygoid and suprahyoid muscles·AU26 moderately lowers the jaw through relaxation, while AU27 forcefully lowers it further. |
| | Blendshape mouthClose AU8 lips toward each otherAU26 jaw drop/AU27 mouth stretch | Muscle(s) & Function orbicularis oris, masseter, temporalis, pterygoids, digastric·Brings the lips together by lowering the upper lip and raising the lower lip. |
| | Blendshape mouthDimpleLeft AU14 dimpler | Muscle(s) & Function buccinator·Draws the corners of the lips back against the teeth, tightening the mouth corners. |
| | Blendshape mouthDimpleRight AU14 dimpler | Muscle(s) & Function buccinator·Draws the corners of the lips back against the teeth, tightening the mouth. |
| | Blendshape mouthFrownLeft AU15 lip corner depressor | Muscle(s) & Function depressor anguli oris·Draws the corners of the lips downward, creating a downturned lip shape. |
| | Blendshape mouthFrownRight AU15 lip corner depressor | Muscle(s) & Function depressor anguli oris·Draws the corners of the lips downward, creating a slight frown or neutral expression. |
| | Blendshape mouthFunnel AU22 lip funneler | Muscle(s) & Function orbicularis oris·Projects and spreads the lips outward, separating and fanning out the lips. |
| | Blendshape mouthLeft N/A a mixture of actions | Muscle(s) & Function N/A: a mixture of asymmetric muscle contractions on each side of the face |
| | Blendshape mouthLowerDownLeft AU16 lower lip depressor | Muscle(s) & Function depressor labii inferioris·Draws the lower lip downward and laterally, stretching it down and to the sides. |
| | Blendshape mouthLowerDownRight AU16 lower lip depressor | Muscle(s) & Function depressor labii inferioris·Draws the lower lip downward and laterally, stretching it down and to the sides. |
| | Blendshape mouthPressLeft AU24 lip presser | Muscle(s) & Function orbicularis oris·Presses the upper and lower lips firmly together. |
| | Blendshape mouthPressRight AU24 lip presser | Muscle(s) & Function orbicularis oris·Presses the upper and lower lips firmly together. |
| | Blendshape mouthPucker AU18 lip pucker | Muscle(s) & Function incisivus labii superioris, incisivus labii inferioris·Draws the lip corners toward each other causing the fleshy part of the lips to protrude. |
| | Blendshape mouthRight N/A a mixture of actions | Muscle(s) & Function N/A: a mixture of asymmetric muscle contractions on each side of the face |
| | Blendshape mouthRollLower AU28 lips suck (bottom) | Muscle(s) & Function orbicularis oris·The bottom portion of AU28 draws the lower lip into the mouth opening, wrapping it around the lower teeth. |
| | Blendshape mouthRollUpper AU28 lips suck (top) | Muscle(s) & Function orbicularis oris·The top portion of AU28 draws the upper lip into the mouth opening, wrapping it around the upper teeth. |
| | Blendshape mouthShrugLower AU17 chin raiser | Muscle(s) & Function mentalis·Pushes up the lower lip and chin area, causing the chin to protrude slightly and the lower lip to rise. |
| | Blendshape mouthShrugUpper AU17 chin raiser | Muscle(s) & Function mentalis·Pushes up the upper lip and chin area, causing the chin to protrude slightly and the upper lip to rise. |
| | Blendshape mouthSmileLeft AU12 lip corner puller | Muscle(s) & Function zygomaticus major·Draws the corners of the lips upward, backward, and laterally, creating a stretched or elongated smile. |
| | Blendshape mouthSmileRight AU12 lip corner puller | Muscle(s) & Function zygomaticus major·Draws the corners of the lips upward, backward, and laterally, creating a stretched or elongated smile. |
| | Blendshape mouthStretchLeft AU20 lip stretcher | Muscle(s) & Function risorius·Draws the lip corners laterally, stretching the fleshy part of the lips. |
| | Blendshape mouthStretchRight AU20 lip stretcher | Muscle(s) & Function risorius·Draws the lip corners laterally, stretching the fleshy part of the lips. |
| | Blendshape mouthUpperUpLeft AU10 upper lip raiser | Muscle(s) & Function levator labii superioris·AU10 lifts the top lip, more laterally than AU9 but more medially than AU11. |
| | Blendshape mouthUpperUpRight AU10 upper lip raiser | Muscle(s) & Function levator labii superioris·AU10 lifts the upper lip, more laterally than AU9 but more medially than AU11. |
| | Blendshape cheekPuff AD34 puff | Muscle(s) & Function buccinator, orbicularis oris·Expands the cheeks by forcing air into them, causing them to puff outward. |
| | Blendshape cheekSquintLeft AU6 cheek raiser | Muscle(s) & Function orbicularis oculi, orbital portion·Tightens the outer rings of the eye orbit and squeezes the lateral eye corners. |
| | Blendshape cheekSquintRight AU6 cheek raiser | Muscle(s) & Function orbicularis oculi, orbital portion·Tightens the outer rings of the eye orbit and squeezes the lateral eye corners. |
| | Blendshape noseSneerLeft AU9 nose wrinkler | Muscle(s) & Function levator labii superioris alaeque nasi·Lifts the sides of the nose, nostrils, and central upper lip area. |
| | Blendshape noseSneerRight AU9 nose wrinkler | Muscle(s) & Function levator labii superioris alaeque nasi·Lifts the sides of the nose, nostrils, and central upper lip area. |
