On the restoration of co-ordinated movements after nerve-crossing, with interchange of function of the cerebral cortical centres / by Robert Kennedy.

  • Kennedy, Robert, -1924.
Date:
1901
Catalogue details

Licence: In copyright

Credit: On the restoration of co-ordinated movements after nerve-crossing, with interchange of function of the cerebral cortical centres / by Robert Kennedy. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

    19/46 (page 141)
    extension of the left fore-paw was the result. Stimulation of tliese three points thus gave the reactions described by Frttsoh and Hitzig. The left hemisphere was then examined. The centre for the liinddimlj was first determined, and it was found to correspond closely in position with tliat of tlie right hemis])]iere, and to give the same movement of the right hinddimlj. Tlie electrodes were then applied to the point on Cere1)ral Hemisplieies of Dog. Stinmlation at the points marked 11 produced movements of tlic liinddiml)s; at the points marked E contractions of the extensor muscles of the fore-paws; and at the points marked F contractions of the flexor muscles of the fore-paM-s. the sigmoid gyrus, corresponding in position to the centre for flexion on the right hemis|)here, and vigorous extension of tlie right fore-paw was tlie result. The electrodes were then applied at the point corresponding to the extension centre of tlie right hemisphere, and here also extension of the light fore-pa^v was the result. The cortex was stimulated around this at several points, l)ut no flexion movement at this examination could be oljtained. The seat of crossing of tlie nerves was then exposed, and it was seen that the two points of reunion were widely separated, one lying on the internal face and the other on the external face of the anconeus internus muscle. The central segments of the median, ulnar, and musculo-cutaneous Ijent outwards to pass to the outer side of the muscle, where their junction with the peripheral segment of the musculo-spiral could be seen. The central segment of tlie musculo-spiral ])assed under tlie central segments of the median, ulnar, and musculo-cutaneous about '2 centinis. above their ])oint of uni(>n with the peripheral segment of the musculo-s2)iral. It passed downwards over the internal face of the anconeus intei'nus to make connection with the pei'ijjheral segments of the median, ulnar, and musculo-cutaneous aboiit 2'5 centims. lower down.