This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 edition. Excerpt: ... LECTURE II CO-ORDINATION IN THE SIMPLE REFLEX (continued) Argument: Reflex-arcs show high capacity for summing excitations ...
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 edition. Excerpt: ... LECTURE II CO-ORDINATION IN THE SIMPLE REFLEX (continued) Argument: Reflex-arcs show high capacity for summing excitations. Irreversibility of direction of conduction in reflex-arcs. Reversibility of direction of conduction in certain nerve-nets, e. g. that of Medusa. Independence between the rhythm of the reflex-discharge and the rhythm of the external stimulus exciting it. Refractory phase in reflexes; in the eyelid-reflex; in the scratch-reflex. The neuronic construction of the reflex-arc of the scratch-reflex. Long descending proprio-spina! tracts revealed by the method of "successive degeneration." The "final common path" and the "afferent arc." Intraspinal seat of the refractory phase of the scratch-reflex. The value of refractory phase in the co-ordination of the swimming of Medusa. Its value in the co-ordination of the scratch-reflex. Significance of the intraspinal situation of the refractory phase of the scratchreflex. Other instances of " central" refractory phase. i Summation. Summation of subliminal stimuli so that by repetition they become effective is practically unknown in nervetrunk conduction. But it is a marked feature of reflex-arc conduction (Setschenow,31 Stirling67). Nor is it attributable to the muscles whose contraction may serve as index of the reflexresponse, since summation of this extent is not known for vertebrate skeletal muscle, though found by Richet98 in the claw-muscle of the crayfish. We find striking instances of the summation of subliminal stimuli given by the scratch-reflex. The difficulty in exciting a reflex by a single-induction shock is well known. A scratch-reflex cannot in my experience be elicited by a singleinduction shock, or even by two shocks, unless as physiological stimuli they are very...
Reader copy. 1961-Acceptable condition black cloth hardcover with gilt lettering on spine, no dj, ex university library with the usual material. Text is clean and unmarked. Binding cracked inside front cover, otherwise tight. Some scuff marks to covers, spine cloth faded. Thanks, we appreciate your order!
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