Unlocking the Enigma of the Right Sternalis Muscle: An In-Depth Exploration of Its Anatomy

The right sternalis muscle is an anomalous muscle occasionally found in the anterior chest wall, situated along the sternum. This muscle’s anatomy is characterized by variations in size, shape, and attachment points, which can make it challenging to discern its precise function. While the right sternalis muscle is subject to debate and speculation, several theories have been proposed regarding its potential functions. It may be a vestigial muscle, a remnant of an ancestral muscle, provide postural support, or have no significant function in modern humans. Its presence or absence is primarily governed by genetic factors, with variations among different populations. This article explores the anatomy, prevalence, and potential functions of the right sternalis muscle, shedding light on an enigmatic structure in the human body.