The neck muscles are a group of muscles that support the head and allow for its movement. They play a crucial role in activities such as turning, tilting, and nodding the head. Key neck muscles include the sternocleidomastoid, which helps rotate the head, and the trapezius, which supports shoulder movement and posture. These muscles are also important for maintaining stability and balance. They work in coordination with other muscle groups in the shoulders and upper back to facilitate a wide range of motions. Proper neck muscle function is essential for everyday activities and overall physical health.