Metopus

Metopus
Details
Identifiers
Latin	Metopus
TA98
TH	{{#property:P1694}}
TE	{{#property:P1693}}
FMA	{{#property:P1402}}
Anatomical terminology

The metopus is a term used in anatomy to refer to the region of the forehead that is located between the eyebrows and the hairline. It is a part of the frontal bone of the skull and plays a significant role in the overall structure and appearance of the human face.

Anatomy

The metopus is primarily composed of the frontal bone, which is one of the eight bones that form the cranium. The frontal bone is responsible for protecting the frontal lobe of the brain and providing structure to the face. The metopic suture, which is a fibrous joint that divides the frontal bone into two halves during early development, typically fuses by the age of 8. However, in some individuals, the metopic suture remains unfused, a condition known as metopic synostosis.

Function

The metopus serves several functions:

• Protection: It provides a protective barrier for the frontal lobe of the brain.
• Support: It supports the muscles of the forehead, which are involved in facial expressions such as frowning and raising the eyebrows.
• Aesthetics: The shape and contour of the metopus contribute to the overall appearance of the face.

Clinical Significance

The metopus can be involved in various clinical conditions:

• Metopic Synostosis: A condition where the metopic suture fuses prematurely, leading to a triangular-shaped forehead known as trigonocephaly. This can affect brain development and facial symmetry.
• Frontal Sinusitis: Inflammation of the frontal sinuses, which are located within the frontal bone, can cause pain and pressure in the metopus region.
• Trauma: Injuries to the forehead can result in fractures of the frontal bone, affecting the metopus.

Development

During embryonic development, the frontal bone forms from two ossification centers that eventually fuse along the metopic suture. This process is typically complete by early childhood, but variations can occur, leading to different clinical presentations.

Also see

• Frontal bone
• Cranial sutures
• Facial expressions
• Trigeminal nerve