Ligamentum nuchae

A fibrous structure that extends from the vertebrae in the neck to the back of the skull.

This ligament is a strong, fibrous band located at the back of the neck, extending from the spinous processes of the cervical vertebrae to the external occipital protuberance of the skull. Composed primarily of elastic fibers, the ligamentum nuchae contributes to both stability and flexibility in head and neck movements.

Terminologia Anatomica

ligamentum-nuchae

System

Musculoskeletal system

Function

The ligamentum nuchae serves several important functions in the body. It plays a critical role in supporting the weight of the head, particularly during activities that involve bending and turning the neck. By providing resistance to flexion, it helps maintain proper posture and spinal alignment. Additionally, the ligament acts as an attachment point for muscles, including the trapezius and splenius muscles, facilitating head and neck movement. The elastic nature of the ligamentum nuchae allows for dynamic movement while ensuring stability, making it essential for activities such as running, jumping, or any rapid movements of the head.

Location

The ligamentum nuchae is located in the posterior (back) part of the neck. It stretches from the seventh cervical vertebra (C7) upward to the external occipital protuberance, a bony prominence on the back of the skull. This ligament defines the midline of the neck and provides a supportive structure for the upper cervical vertebrae. It runs parallel to the spine and sits beneath the trapezius muscle, allowing for the attachment of various muscles that facilitate neck movements.

Did You Know?

The ligamentum nuchae is homologous to the supraspinous ligament found in other regions of the spine, providing similar support and stability.
In some animals, such as horses, the ligamentum nuchae is more developed and serves crucial roles in maintaining balance while running at high speeds.
The elasticity of the ligamentum nuchae helps absorb shock during movements, reducing strain on the cervical spine.