Name the forehead muscle that helps us to frown.


Name the forehead muscle that helps us to frown.

Muscles of the Head

All regions of the body consist of muscles. Muscles enable us to move and preform all daily functions including chewing our food and shaping our facial expressions. The muscles of the face are divided into two broad categories, the muscles of mastication (chewing) and the muscles of facial expression.

Answer and Explanation:

The muscle that helps us frown is the occipitofrontalis muscle, specifically the frontal belly portion (or frontalis).

The occipitofrontalis muscle is divided into two sections: the frontal belly and the occipital belly. In some cases, these muscles are considered as two separate muscles, but the medical community considers them as one muscle.

The frontal belly (frontalis) originates at the epicranial aponeurosis. This is a layer of aponeurosis tissue that covers the top portion of the head. The muscle inserts in the skin and subcutaneous tissue of the eyebrows and forehead. The main actions of this muscle are: to protract the scalp, wrinkle the forehead, help in frowning, and elevate the eyebrows.

The frontal belly is innervated by the temporal branch of the facial nerve (CN VII). The blood supply to the muscle is the supraorbital and supratrochlear arteries, which are branches of ophthalmic artery. The ophthalmic artery is a branch of the internal carotid artery.

Learn more about this topic:

Muscles of the Head and Neck: Anatomy, Motion & Support

from Biology 105: Anatomy & Physiology

Chapter 6 / Lesson 3

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