Tag: Anatomical variation

Anatomical variations are common throughout the human body, and the triceps brachii muscle is no exception. Research confirms that it is entirely possible for your triceps to have different insertions, even between your two arms, a genetic factor influencing their shape and potential appearance. This article will explore the anatomical details behind this variation and how it can affect your fitness journey.

With only an estimated 8% of the population possessing it, the sternalis is often cited as a top contender when asking: what is the rarest muscle in the body?. However, other muscles, like the palmaris longus and pyramidalis, are also commonly absent, making the definition of “rarest” a matter of some debate among anatomists.

Approximately 1% of the population is born with an extra rib, known as a cervical rib, which can occur on one or both sides. This anatomical anomaly often goes unnoticed, but it raises the question: **Is it normal to have an extra rib on one side?**