👉 The term "temporomastoid" refers to a structure or nerve bundle that connects the muscles of the shoulder joint. It is located between the shoulders and includes the ulnar nerve, which supplies the muscles of the arm with sensory signals. In simple terms, the temporomastoids are responsible for controlling the movement of the shoulder joint. They help regulate the range of motion and prevent excessive movement, ensuring that the shoulder can properly engage and disengage from its ball-and-socket mechanism
