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Bell-Magendie Law
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The effect of the posterior and anterior roots on the spinal cord. Magendie found that nerve fibers exited the spinal cord in pairs before joining together, with one root closer to the interior of the body.
Posterior roots controlled sensation. Anterior controlled motor responses. Showed the reflexes of sensation and movement. Also implied that nerves send messages in a single direction and that there were different sensory and motor tracts within the spinal cord and perhaps different sensory and motor regions within the brain. Muller's Doctrine of Specific Nerve Energies was what actually discussed the different senses as being stimulated by different nerves. Muller's Doctrine of Specific Nerve Energies was what actually discussed the different senses as being stimulated by different nerves. The Bell-Magendie Law differentiated these sensory nerves from motor nerves, but it was Muller's work that further specified the different sensory nerves. |
