Abstract
Study of reflex inhibition has been prosecuted more with extensor centres than with flexor. In the case of these latter, the experimental examination of the inhibition is of necessity somewhat differently circumstanced than in the case of the extensors. For both there is requisite a suitable background of reflex excitement against which inhibition may be evident. With the extensors this reflex background of excitement can be provided by postural tonus, and such tonus is readily obtained by use of the decerebrate preparation. With the flexors there is at present no procedure available for providing such tonic preparations. Recourse has to be taken to theproduction of reflex excitation of the centres by artificial stimuli applied to some appropriate afferent channel.

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