The frontal bone is a flat, curved bone that forms the front part of the human skull. It is one of the bones that make up the neurocranium, which is the protective bony covering of the brain. The frontal bone extends from the forehead to the top of the head and forms the anterior (front) portion of the skull.
Key features and characteristics of the frontal bone include:
- Frontal Sinuses: The frontal bone contains the frontal sinuses, which are air-filled cavities located within the bone. These sinuses are connected to the nasal passages and play a role in humidifying and filtering the air we breathe.
- Supraorbital Foramen/Notch: Above each eye, the frontal bone has a small opening called the supraorbital foramen or supraorbital notch. This opening allows for the passage of nerves and blood vessels.
- Glabella: The smooth, slightly raised area of the frontal bone between the eyebrows is called the glabella.
- Coronal Suture: The frontal bone articulates with the parietal bones of the skull along a suture known as the coronal suture. This suture extends from one side of the head to the other and separates the frontal bone from the parietal bones.
- Metopic Suture (in Infants): In infants and young children, the frontal bone is often divided into two halves by a suture called the metopic suture. As a person ages, this suture typically fuses and disappears, resulting in a single, solid frontal bone.
The frontal bone serves to protect the frontal lobes of the brain, which are involved in various cognitive functions and personality. Additionally, it contributes to the overall shape and appearance of the forehead and face.
In craniofacial anatomy and medicine, the frontal bone is of particular interest because of its involvement in facial fractures, cranial surgery, and various medical procedures. Understanding its structure and features is essential for medical professionals working in these fields.
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