What is the main function of the interspinous ligaments?

The interspinous ligaments play a crucial role in the stability of the spine, particularly in limiting excessive spinal flexion. These ligaments are located between the spinous processes of consecutive vertebrae. When the spine undergoes flexion, the interspinous ligaments become taut, helping to prevent hyperflexion that could lead to injury. This function is particularly important in maintaining proper spinal alignment and integrity during various movements and activities.

In contrast, the other options relate to different functions associated with spinal anatomy and biomechanics. While ligaments throughout the spine contribute to overall stability and movement restriction, it is specifically the interspinous ligaments that primarily limit flexion, allowing the vertebrae to maintain their positions relative to one another and protecting against excessive forward bending.