Frontalis
Frontalis
Frontalis (pronunciation: fron-TAY-lis) is a muscle of the forehead in humans. It is part of the facial muscles and is involved in facial expressions.
Etymology
The term "Frontalis" is derived from the Latin word "frons" which means forehead. The suffix "-alis" is a common ending in Latin which denotes 'pertaining to'. Therefore, Frontalis pertains to the forehead.
Anatomy
The Frontalis muscle is thin and quadrilateral in shape. It is intimately adherent to the superficial fascia and is located on the frontal bone of the skull. It is responsible for the movement of the skin of the forehead, including raising the eyebrows and wrinkling the forehead skin.
Function
The primary function of the Frontalis muscle is to raise the eyebrows, especially when looking up. It also acts to wrinkle the forehead horizontally which can be seen when a person is surprised or scared.
Related Terms
- Occipitalis: The muscle at the back of the skull that works in conjunction with the Frontalis.
- Epicranial aponeurosis: A tough layer of dense fibrous tissue which links the frontalis and occipitalis.
- Facial expression: The movement of the facial muscles to convey emotion.
- Facial muscles: The group of muscles in the face which control facial expression.
External links
- Medical encyclopedia article on Frontalis
- Wikipedia's article - Frontalis
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