The Integrative Action of the Nervous System. E-book. Formato PDF - 9780243784356

Introductory — CO — ordination IN the simple reflex Argument: The nervous system and the integration of bodily reactions. Characteristics of integration by nervous agency. The unit mechanism in integration by the nervous system is the re?ex. Coordination of re?exes one with another. CO ordination in the simple reflex. Conduction in the re?ex-arc. Function Of the receptor to lower for its re?ex-arc the threshold value Of one kind Of stimulus and to heighten the threshold value of all other kinds of stimuli for that arc: it thus confers selective excitability on the arc. Differences between con duction in nerve-trunks and in re?ex-arcs respectively. These probably largely referable to the intercalation of synaptic mem branes in the conductive mechanism Of the arc. Latent time of re?exes. Re?ex latency inversely proportional to intensity of stimulation. Latency Of initial and incremental re?exes. None of the latent interval consumed in establishing connec tion between the elements Of a resting arc. After-discharge a characteristic Of re?ex reactions. Increase of after-discharge by intensification of the stimulus, or by prolongation Of short stimuli. Inertia and momentum of re?ex-arc reactions.