The Facial expression reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Facial expression

A facial expression is a motion or position of the muscles of the face. Facial expressions often express, or are interpreted as expressing, emotion.

Facial expressions include:

• blank
• excitement
• laughter
• crying (that is with sadness)
• shock
• puzzled
• frown
• desire
• concentration
• smile
• smugness or self-satisfaction
• sneer
• snarl
• etc.

A minute flash of a facial expression is called a microexpression.

The muscles of facial expression are:

• Auricularis anterior muscle
• Buccinator muscle
• Corrugator supercilii muscle
• Depressor anguli oris muscle
• Depressor labii inferioris muscle
• Depressor septi nasi muscle
• Frontalis muscle
• Levator anguli oris muscle
• Levator labii supeioris muscle
• Levator labii superioris alaeque nasi muscle
• Mentalis muscle
• Nasalis muscle
• Orbicularis oculi muscle
• Orbicularis oris muscle
• Platysma muscle
• Procerus muscle
• Risorius muscle
• Zygomaticus major muscle
• Zygomaticus minor muscle

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