What is ligamentum nuchae?

The ligamentum nuchae, also known as the nuchal ligament, is a thick fibrous structure that extends from the base of the skull to the spinous processes of the cervical vertebrae. It is located in the midline of the neck and helps support and stabilize the head and neck.

The ligamentum nuchae is composed of two layers, with the outer layer being thicker and stronger than the inner layer. The outer layer is composed of collagen fibers and elastin, while the inner layer is made up of elastic fibers.

In some animals, such as horses and giraffes, the ligamentum nuchae is particularly prominent and provides additional structural support to the neck and head.

In humans, the ligamentum nuchae can sometimes become calcified or ossified, leading to a condition known as cervical spondylosis. This can cause stiffness and pain in the neck and may require physical therapy or medication to manage.