Buccinator muscle

Buccinator Muscle

File:Buccinator muscle.png

The buccinator muscle (highlighted in green)

The buccinator muscle is a thin, flat muscle of the cheek, deep to the masseter muscle. It is part of the muscles of facial expression and is primarily responsible for compressing the cheeks against the teeth and blowing air out of the mouth.

Structure

The buccinator muscle originates from the alveolar processes of the maxilla and mandible, and the pterygomandibular raphe. It inserts into the orbicularis oris muscle at the corner of the mouth. The buccinator muscle is innervated by the facial nerve (cranial nerve VII).

Function

The buccinator muscle assists in mastication by keeping food between the grinding surfaces of the teeth, rather than letting it spread out inside the oral cavity. It also aids in speech by controlling air flow, and is used in activities such as blowing out candles or playing wind instruments.

Clinical significance

Damage to the buccinator muscle can result in difficulty with certain actions such as blowing or whistling. It can also affect speech and eating. Conditions that can affect the buccinator muscle include Bell's palsy, trauma, and certain neuromuscular diseases.

See also

• Facial muscles
• Muscles of mastication
• Facial nerve

References

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