What is the name of the muscle that connects the shoulder to the chin?

The muscle that connects the shoulder to the chin is the platysma. This broad, thin sheet of muscle extends from the upper chest and shoulder area, moving up through the neck and attaching to the lower jaw (mandible) and the chin.

The primary function of the platysma is to facilitate movements like pulling down the corners of the mouth, which contributes to facial expressions of tension or sadness. Additionally, it plays a role in the overall appearance of the neck and jawline.

In contrast, the other muscles listed serve different functions or locations. The masseter is primarily responsible for chewing and is located in the jaw. The deltoid is a major muscle of the shoulder and is not directly involved in connecting to the chin. The trapezius is a large muscle covering the upper back and neck, involved in moving the shoulder blades and supporting the arm, but it does not extend down to the chin. Understanding the specific roles and locations of these muscles helps clarify why the platysma is the correct answer.