Auricular appendix

Auricular Appendix

The auricular appendix, also known as the auricular tubercle or Darwin's tubercle, is a minor anatomical feature of the external ear in humans. It is a small, pointed elevation that is present on the surface of the outer ear (the pinna) in some individuals.

History

The auricular appendix was first described by British naturalist Charles Darwin in his book "The Descent of Man" published in 1871. Darwin noted that the feature is common in some primates and hypothesized that it was a vestigial feature in humans, a remnant of our evolutionary past. This is why it is sometimes referred to as Darwin's tubercle.

Anatomy

The auricular appendix is located on the upper, posterior part of the ear. It is found at the junction of the helix and the scapha, two of the folds of the external ear. The size and shape of the auricular appendix can vary greatly among individuals. In some people, it is a prominent bump, while in others it may be barely noticeable.

Prevalence and Genetics

The presence of an auricular appendix is a genetically inherited trait. It is not associated with any known health conditions and is considered a normal variation in human anatomy. Studies have shown that the trait follows an autosomal dominant pattern of inheritance, meaning that if one parent has the trait, there is a 50% chance that their child will also have it.

Cultural Significance

In some cultures, the presence of an auricular appendix is associated with various superstitions and beliefs. For example, in some parts of Asia, it is believed that individuals with an auricular appendix are more intelligent or have a longer lifespan.

See Also

• Ear
• Charles Darwin
• Genetics
• Human evolution