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Patellar reflex

How it is explained that person having the spinal cord which is sectioned at cervical level is still able to conduct the patellar reflex?

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The arch reflex depends only over the integrity of fibers at the single spinal level. Within the arch reflex motor response to the stimulus is involuntary and automatic and does not depend on passage of information to the brain. Thus, it occurs even in the case the spinal cord gets damaged at another levels.

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