Which muscles are considered the primary stabilizers of the spine that do not cause global movement?

• A. Rectus Abdominis and Erector Spinae
• B. Transverse Abdominis and Multifidus
• C. Internal and External Obliques
• D. Quadratus Lumborum and Psoas Major

Answer: (B)

The Transverse Abdominis and Multifidus are recognized as the primary stabilizers of the spine that do not contribute to global movement. The Transverse Abdominis functions by increasing intra-abdominal pressure and providing a corset-like support around the trunk. This helps to stabilize the lumbar spine during various physical activities without producing significant movement at the spine itself.

The Multifidus plays a critical role in controlling segmental stability of the vertebrae. It consists of a series of small muscles located along the spine that provide proprioceptive feedback and assist in maintaining posture and spinal alignment during both static and dynamic movements. By stabilizing the spine in this way, the Multifidus also reduces the risk of injury and enhances overall spinal function.

In contrast, the other options involve muscles that contribute to larger movements or act primarily at the trunk and hips rather than focusing on the stability of the spine itself. Muscles like the Rectus Abdominis and Erector Spinae promote global movements such as flexion and extension of the spine, while the Internal and External Obliques are responsible for trunk rotation and side bending. Quadratus Lumborum and Psoas Major, while they assist with pelvic stabilization and hip flexion, do not primarily function