Facial muscle

Facial Muscle

The Facial Muscle (pronunciation: /ˈfeɪʃəl ˈmʌsəl/) is a group of about 20 flat skeletal muscles lying under the facial skin. These muscles are responsible for facial expressions and are unique as they are directly attached to the skin.

Etymology

The term "Facial Muscle" is derived from the Latin words "facies" meaning face and "musculus" meaning little mouse, which is a reference to the muscle's appearance and movement under the skin.

Structure

The facial muscles are divided into two groups: the muscles of facial expression and the muscles of mastication. The muscles of facial expression are further divided into three groups: orbital, nasal, and oral.

Orbital Muscles

The Orbital Muscles are responsible for the movements of the eyes and eyebrows. They include the Corrugator Supercilii, Orbicularis Oculi, and Levator Palpebrae Superioris.

Nasal Muscles

The Nasal Muscles control the movements of the nose. They include the Procerus, Nasalis, and Depressor Septi Nasi.

Oral Muscles

The Oral Muscles control the movements of the mouth and lips. They include the Orbicularis Oris, Buccinator, and Mentalis.

Function

The facial muscles are responsible for all the movements of the face, including smiling, frowning, and winking. They also play a crucial role in non-verbal communication and facial recognition.

Related Terms

• Muscle
• Skeletal Muscle
• Facial Expression
• Mastication
• Non-Verbal Communication
• Facial Recognition

External links

• Medical encyclopedia article on Facial muscle
• Wikipedia's article - Facial muscle

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