A laminectomy removes the lamina and spinous process. The lamina is the posterior bridging segment (D). The lateral bridging segment is the pedicle (B).
However, I don't understand how you could access the herniated disc from this angle, the spinal cord would be in the way! Can someone explain?
coby219"Intervertebral disc (nucleus pulposus) herniates posterolaterally through annulus fibrosus (outer ring) into central canal due to thin posterior longitudinal ligament and thicker anterior longitudinal ligament along midline of vertebral bodies. Nerve affected is usually below the level of herniation." - first aid 19 p455+5
chj7Adding to coby219, after knowing herniation most commonly occurs posterolaterally, we would most likely choose between B and D. The only reasonable choice from a surgical perspective would be D b/c we would most likely be entering the patient's vertebrae from the back (thus, B would be harder to access).+1
freemanpengQuestion stem said" laminectomy". I just ingored it and kept struggling between lamina(D) and pedicle(B)...... So, it's not about neurosurgery; it's just basic anatomy!+1
submitted by โazibird(279)
A laminectomy removes the lamina and spinous process. The lamina is the posterior bridging segment (D). The lateral bridging segment is the pedicle (B).
However, I don't understand how you could access the herniated disc from this angle, the spinal cord would be in the way! Can someone explain?
https://www.mayoclinic.org/tests-procedures/laminectomy/about/pac-20394533