Muscle Origin, Insertion, Action - Upper Adv

Front

What is the origin of the zygomaticus muscle?

Back

Zygomatic arch.

Front

What is the action of the platysma muscle?

Back

Depresses lower lip and angle of mouth.

Front

What is the action of the orbicularis oculi muscle?

Back

Closes the eyes.

Front

What is the origin of the sternocleidomastoid muscle?

Back

Sternum and clavicle.

Front

What is the insertion of the brachialis muscle?

Back

Coronoid process of ulna.

Front

Define 'muscle origin'.

Back

The point where a muscle attaches to a stationary bone.

Front

Define 'muscle insertion'.

Back

The point where a muscle attaches to a movable bone.

Front

What is the primary action of the masseter muscle?

Back

Elevates the mandible (closes the jaw).

Front

What is the function of the temporalis muscle?

Back

Elevates and retracts the mandible.

Front

Identify the action of the buccinator muscle.

Back

Compresses the cheeks.