The Nasalis muscle originates from the maxilla, the bone that forms the upper jaw.
The Origin of the Nasalis Muscle
The Nasalis muscle, a key facial muscle involved in movements of the nose, begins its anatomical journey on the maxilla. More specifically, its origin point is located superolateral to the incisive foramen.
From this point of origin on the maxilla, the muscle's fibers extend in a distinctive path:
- Initial Course: The fibers course superomedially, meaning they move upwards and towards the midline of the face.
- Distal Expansion: As these fibers ascend towards the bridge of the nose, they broaden and flatten, eventually expanding into a thin, sheet-like tendon known as an aponeurosis.
This precise origin allows the Nasalis muscle to effectively contribute to nasal expressions and movements, such as flaring or compressing the nostrils.
Here's a summary of its origin:
- Bone of Origin: Maxilla
- Specific Location on Bone: Superolateral to the incisive foramen
- Initial Fiber Direction: Superomedially
