Spinal motion segment

Mechanism and function

Its movement and load resistance depend on interacting components. Total spinal mobility results from many segments, and restriction does not automatically reveal its cause.

Assessment and clinical implications

Assessment combines symptoms, examination and imaging when needed. Palpated motion alone does not establish radiological instability or disc injury.

Points to consider

Spinal movement is distributed across segments and coordinated with the pelvis and limbs. A single measurement does not define ideal posture or instability. Range, load, speed and tolerance should be considered together.

Role of TAGMED care

At TAGMED, assessment aims to understand symptoms, history and functional limitations. Manual care and osteopathy, motorized spinal decompression, laser and shockwave have different indications. The term described in this entry is not enough to select any of these modalities. Their relevance, limitations and possible contraindications should be discussed in relation to diagnosis and individual goals.

Related concepts and distinctions

These concepts belong to the same field, but are not synonyms.

• Spinal flexion — Forward bending of the spine distributed across several segments and often combined with pelvic and hip movement.
• Spinal extension — Backward bending of the spine involving joints, discs and muscular control across several segments.
• Spinal rotation — Movement around the spine’s longitudinal axis, with range varying considerably between cervical, thoracic and lumbar regions.

Medical references

1. OpenStax, Rice University. Anatomy and Physiology 2e — The Vertebral Column.
2. OpenStax, Rice University. Anatomy and Physiology 2e — Axial Muscles of the Head, Neck, and Back.

References document the topic; their inclusion does not imply endorsement of TAGMED services by those organizations.