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CSF cytology and HIV serology were both negative. EMG, however, confirmed the clinical findings of polyradiculopathy. T1W and T2W MRI of the lumbar spine demonstrated diffuse thickening of the nerve roots of the cauda equina, which enhanced following intravenous gadolinium administration (Figs. 1 and 2). No parenchymal involvement was seen.
Variations in the pattern of muscle innervation by the L5 and S1 nerve roots. Young A, Getty J, Jackson A, Kirwan E, Sullivan M, Parry CW. Evidence based on electrical studies is presented for the standard and anomalous patterns of innervation of muscles supplied by the fifth lumbar and first sacral nerve roots.ariations in the pattern of muscle innervation by the L5 and S1 nerve roots. Young A, Getty J, Jackson A, Kirwan E, Sullivan M, Parry CW. Evidence based on electrical studies is presented for the standard and anomalous patterns of innervation of muscles supplied by the fifth lumbar and first sacral nerve roots.