Visualization of the electrical activity of the cauda equina using a magnetospinography system in healthy subjects

In lumbar spinal diseases such as lumbar spinal canal stenosis, compression lesions in multiple vertebrae are often found in imaging examinations. However, it is often difficult to evaluate the true lesion sites responsible for symptoms by imaging techniques alone (Kent et al., 1992; Mamisch et al., 2012). In addition, it is often necessary to evaluate the locations of the spinal nerve compression, such as intra-canal, intra-foraminal, or extra-foraminal, to choose the appropriate surgical technique (Macnab, 1971; Wiltse et al., 1984; Kunogi and Hasue, 1991; Olsewski et al., 1991).

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