A BIOMECÂNICA DA COLUNA - COMO CADA SEGUIMENTO SE MOVE E POR QUE ISSO IMPORTA

In this video, you will understand how the spine moves, its limits, and what happens when it exceeds them. We explain the range of motion of each region—why the cervical spine is the most mobile, why the lumbar spine rotates so little, and why this is determined by the geometry of the facet joints. You will understand the concept of the neutral zone and why its increase is a sign of segmental instability, how repetitive loads accumulate progressive damage even at moderate intensities, and why the vertebral endplate is the weakest point of the spine under compression. We also explore what happens to the biomechanics of the segment when the disc degenerates—how the axis of rotation migrates to the facet joints, overloading structures that were not designed for this, and why degeneration at one level increases the load on adjacent segments, the basis of the phenomenon of degeneration adjacent to fusion. All this biomechanical reasoning is essential to understanding why certain movements injure the spine, why some surgeries work better than others, and how to plan rehabilitation in a well-founded way. Subscribe to the channel, activate the bell, and leave your question or the topic you want to see in future videos in the comments! #AllAboutTheSpine #SpineBiomechanics #LowerBackPain #SpineSurgery #SpineRehabilitation What is the neutral zone of the spine? Why does the lumbar spine hardly rotate? Which region of the spine has the greatest range of motion? What is segmental instability of the spine? Why is the endplate the weakest point of the spine? How do repetitive loads injure the spine? What is degeneration adjacent to fusion? Why is weight-bearing lumbar flexion dangerous? How does disc degeneration change the biomechanics of the spine? What is the instantaneous axis of rotation of the spine? Why do the facet joints hurt when the disc degenerates? What happens to the ligaments when the disc loses height? What is the compressive tolerance of the spine? Why are women and the elderly at higher risk of vertebral fracture? What is cumulative trauma to the spine? How does posture affect pressure on nerve roots? Why does lumbar stenosis worsen when walking and improve when sitting? What is neurogenic claudication? What is the difference between instability and degeneration of the spine? How does vertebral fusion affect neighboring segments? Why is torsion so damaging to the disc? What happens to the facet joints in disc degeneration? How does biomechanics explain disc herniation? What are microfractures of the vertebral endplate? Why does Schmorl's node appear on MRI? What is the shear force limit in the lumbar spine? How does muscle fatigue increase the risk of spinal injury? What is movement coupling in the spine? How do computational models help in surgical planning? Why is lifting weight with the spine in flexion doubly dangerous?