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reflex arc |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.04 sec. |
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reflex arc [′rē‚fleks ‚ärk] (neuroscience) A chain of neurons composing the anatomical substrate or pathway of the unconditioned reflex. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The presence of an anal wink and bulbocavemosus reflex suggests an intact S2 through S4 reflex arc. In order to predict the impact of SCI on male erection, knowing the level and degree of a person's injury and whether the injury is in the UMN or LMN and is affecting the sacral reflex arc is critical. Rather, the conditioned spinal reflexes were mediated by changing synaptic efficacy along the reflex arc, perhaps through long-term potentiation (21) or by changing motoneuronal properties (eg, firing threshold), which appears to mediate some forms of synaptic plasticity. |
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