Arcus zygomaticus

Arcus Zygomaticus is a part of the human skeletal system that is also known as the zygomatic arch. It is a thin, elongated, and almost semicircular bone structure located on the side of the skull, extending from the temporal bone to the zygomatic bone.

Anatomy

The arcus zygomaticus is formed by the union of two bones: the temporal process of the zygomatic bone and the zygomatic process of the temporal bone. These two processes meet and fuse together to form the arch. The arch serves as the attachment point for the masseter muscle, which is one of the muscles involved in mastication (chewing).

Function

The primary function of the arcus zygomaticus is to provide a point of attachment for the masseter muscle. This muscle plays a crucial role in the process of mastication, allowing for the movement of the lower jaw during chewing and speaking. The arch also contributes to the overall shape and structure of the face, particularly the cheekbone area.

Clinical Significance

Injuries or abnormalities to the arcus zygomaticus can lead to a variety of medical conditions. For instance, fractures of the zygomatic arch can result in facial trauma, leading to pain, swelling, and difficulty opening the mouth. Such fractures are typically caused by direct blows to the side of the face and are often associated with other facial fractures. Treatment usually involves surgical intervention to realign the fractured bones.

See Also

• Zygomatic bone
• Temporal bone
• Masseter muscle
• Facial trauma