Unveiling the Mysteries of Eyebrows: Their Functions, Thickness, and Importance
Eyebrows are a distinguishing characteristic of human faces that have remained with us through thousands of years of evolution. They serve more than just a cosmetic purpose, as they play an important role in our everyday lives. The following article explores the different functions of eyebrows, their relationship with communication, inheritance, abnormalities and more.
Eyebrows have two main functions – to protect our eyes from moisture and light and to communicate our emotions. They help to keep our eyes clean by moving away wetness from sweat and rain and by reducing the amount of light entering our eyes. Eyebrows also help to block dirt from entering our eyes. The direction of eyebrow hairs is significant as it leads the moisture to the side of the face. Communicatively, eyebrows are essential for facial expressions that allow us to show our emotions. By raising one or both eyebrows, we express different emotions, ranging from skepticism to surprise.
The shape, thickness, and color of eyebrows are inherited traits, as identified by a significant scientific study. Four separate genes determine the texture of eyebrow hair, whereas one gene relates to the shape and five genes affect the color of eyebrow hair. One gene decides if a person develops a monobrow. Beyond genetics, environmental factors such as injuries or skin damage near the eyebrows or years of waxing or tweezing can change shapes permanently.
Relationship with Facial Recognition:
Eyebrows are essential for facial recognition, as revealed in a scientific experiment where famous people's images got manipulated by removing either their eyes or eyebrows. Subjects recognised them even without eyes 60% of the time; however, they recognised only 46% of them without eyebrows, making them an equally essential aspect of facial recognition as the eyes.
Abnormalities of the Eyebrows:
Madarosis or the loss of eyebrows is an example of an abnormality affecting eyebrows. It is also referred to as the loss of eyelashes and is a consequence of various inherited disorders. Environmental factors like excessive plucking or waxing, or severe illnesses that cause hair fall, can contribute to eyebrow loss. In addition, some autoimmune disorders like alopecia universalis can cause hair loss all over the body, potentially affecting eyebrows.
Although eyebrows' primary purpose is to protect the eyes, they hold significant importance in communication, facial recognition, and physical appearance. The texture, shape, and thickness of eyebrows are inherited traits, with environmental factors playing a significant role in their physical appearance. By understanding eyebrows, we can learn about our genetics and physical traits and appreciate the role they play in our everyday lives.
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