Our bodies are incredible creations. We often forget to appreciate the wonders of natural evolution that we embody. Just pause for a moment and realize that we have evolved from creatures similar to chimps into beings capable of building complex societies and exploring the vastness of outer space. It’s truly remarkable, especially considering the relatively short time span in which this transformation has occurred.

What’s even more fascinating is that despite the monumental changes in our environment, we are still remarkably similar to our ancestors from thousands of years ago. However, evolution is a continuous process, albeit a slow one. The evidence of our ongoing evolution is not readily apparent, but it is happening.

Today, we want to bring your attention to a seemingly insignificant tendon in your wrist and its connection to our ongoing journey as humans.

The Evolutionary Connection of the Tendon

This tendon is associated with a muscle called the palmaris longus, which has gradually vanished in 10-15% of the human population. The palmaris longus muscle is crucial for animals that use their forearms for movement, such as lemurs and monkeys. It helps them swing from branch to branch, enhancing their mobility.

What’s intriguing is that ground-dwelling apes like gorillas have lost the function of this muscle over time, as they no longer rely on their forearms for locomotion. Similarly, we humans have also started to lose the tendon connected to the palmaris longus.

The process of evolution is slow, so almost 90% of humans still have this tendon. However, the evidence suggests that it is gradually phasing out.

Try the Simple Test at Home

You can check if you still have this tendon with a simple test at home. First, place your forearm on a flat surface with your palm facing up. Then, touch your pinky finger to your thumb and slightly lift your hand off the surface.

Did you do it? If you observe a distinctive band in the middle of your wrist (which is the tendon), congratulations, you still have it. On the other hand, if you don’t see it, then you likely belong to the small percentage of humans who have already evolved beyond the need for this specific tendon.

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