. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. (A). —> (C) Fig. 302. (A) Diagram of delay path circuit in oculomotor nucleus. F, Floor neurone; I, intemeurone; M, motoneurone; , oculomotor nucleus; COL, coUiculus; MED., medulla. Modified from Lx)rente de N6.^ (B) Schema of a delay path (multiple chain) circuit with three successive intemeurones. (C) Schema of a closed reverberating chain circuit of internuncial neurones. From Lorente de N6.^ cord is indicated.^^'' In the superior cervical sympathetic ganglion the gan- glionic response consists of one
. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. (A). —> (C) Fig. 302. (A) Diagram of delay path circuit in oculomotor nucleus. F, Floor neurone; I, intemeurone; M, motoneurone; , oculomotor nucleus; COL, coUiculus; MED., medulla. Modified from Lx)rente de N6.^ (B) Schema of a delay path (multiple chain) circuit with three successive intemeurones. (C) Schema of a closed reverberating chain circuit of internuncial neurones. From Lorente de N6.^ cord is indicated.^^'' In the superior cervical sympathetic ganglion the gan- glionic response consists of one or more spikes, lasting 6-8 msec, followed by a slow negative wave persisting 50-100 msec.^-^' -''^ When two preganglionic volleys enter the ganglion at such an interval that the second enters during the slow negative wave due to the first, a spike results which is facilitated and has shorter latency than when the second stimulus is applied alone. The time course of this facilitation follows the slow negative wave according to Eccles,^-'' but not according to Rosenblueth and Simeone.'''''' (c) A third explanation for delayed facilitation is by-pass conduction in intemeurones. In the oculomotor nucleus^''-' -''^ , neurones are ar-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Prosser, C. Ladd (Clifford Ladd), 1907-; Bishop, David W. Philadelphia, Saunders
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