Paper, 'Note on the functional and structural arrangement of efferent fibres in the nerve-roots of the lumbo-sacral plexus. (Preliminary communication)' by Charles Scott Sherrington Sherrington writes: 'At the commencement of some observations on the reflex mechanisms of the spinal cord in Macacus, difficulties were encountered which made it desirable to attempt for that animal a somewhat particular examination of the distribution of the efferent and afferent spinal nerve-roots belonging to the lumbo-sacral plexus. The present communication has reference to the distribution of the efferent fibres of the roots.' Annotations in pencil and ink. Subject: Physiology / Neuroscience Received 14 March 1892. Read 17 March 1892. Communicated by Michael Foster. A version of this paper was published in volume 51 of the Proceedings of the Royal Society as 'Note on the functional and structural arrangement of efferent fibres in the nerve-roots of the lumbo-sacral plexus. (Preliminary communication.)'. 1892