====== Lumbar spinal canal ====== The lateral lumbar [[spinal canal]] may be subdivided into the subarticular ([[lateral recess]]), the foraminal ([[pedicle]]) and the [[extraforaminal]] (far lateral) zone. Within these regions lies the “[[Macnab's hidden zone.]]”, an area known for its difficult surgical exposure ((Macnab I. Negative disc exploration. An analysis of the causes of nerve-root involvement in sixty-eight patients. J Bone Joint Surg Am. 1971 Jul;53(5):891-903. PubMed PMID: 4326746. )). ===== Lumbar spinal canal dimensions ===== see [[Lumbar spinal canal dimensions]].