Occipitalis Muscle Laterally
The occipitalis muscle is one of the muscles of the head. It has three sections; the frontalis, the occipitalis, and the galea aponeurotica. The occipital belly of the epicranius muscle is also known as the occipitalis muscle.
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Occipitalis Muscle Laterally
The function of this muscle is to allow the eyebrows to raise and the forehead to wrinkle. The occipitofrontalis muscle (epicranius muscle) has two bellies or parts which cover parts of the skull. The galea aponeurotica porton pulls the scalp posteriorly. The occipitalis is a thin, quadrilateral (four-sided) muscle that originates by tendinous fibers from the lateral part of the superior nuchal line of the occipital bone and the mastoid section of the temporal bone. Besides functioning to help raise the eyebrows and wrinkle the forehead, it also can help wiggle the ears. It helps to create a startled or surprised expression on the face. Anatomy of the Occipitalis Muscle:
The occipital belly near the occipital bone. The frontal belly near the frontal bone. The occipitofrontalis has only one function which is to allow facial expressions. The occipital belly originates on the lateral two-thirds of the superior nuchal line of the occipital bone, and on the mastoid process of the temporal bone. Inserted into the galea aponeurotica, or epicranial aponeurosis, the occipital belly communicates with the frontal belly by an intermediate tendon. From the aponeurosis, the frontal belly is inserted in the fascia of the facial muscles and in the skin above the eyes and nose.
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