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Motor nuclei columns of the spinal cord anterior horn in controls. Pigment-Nissl staining (aldehyde fuchsin and Darrow red) of motor nuclei columns of lamina IX in different segments of spinal cord from C2 to S3 in control cases using the organizational scheme proposed by [50]. The right anterior horn is shown in all sections. IML intermediolateral nucleus, C Clarke’s column (posterior thoracic nucleus), O Onuf’s nucleus. Scale bar in C2 is valid for all segments
