a. in Ciliospinal center, the direct center in the spinal chord, where the nerve-fibers that cause contraction and dilation of the pupil of the eye take their origin: so C. region.
1881. in Syd. Soc. Lex.
1885. W. Stirling, trans. Landois’ Physiol., II. 853. The centre for the dilatation of the pupil lies in the lower cervical part of the cord … constituting Budge’s cilio-spinal centre. Ibid., 990. The centre, as well as the subordinate ‘ciliospinal region’ of the spinal cord…, is also capable of being excited reflexly.
