In the scalp, the superficial musculoaponeurotic system (SMAS) is represented by the galea aponeurotica, which then splits to ensheath the frontalis, the occipitalis, the procerus, and some of the periauricular muscles. In the temporal region, the SMAS, the superficial temporal fascia, and the temporoparietal fascia are synonymous. In the cheek, the SMAS is represented by the parotid fascia as a remnant of the primitive platysma. The SMAS is relatively thick over the parotid gland. However, it thins considerably, thereby making it difficult to dissect medially. The SMAS is continuous with the platysma below and extends to the zygoma above. The precise anatomy of the SMAS, its regional variations, and even the existence of the SMAS are still debated.