Brain Res Dev Brain Res 1989 Jan 01;451:149-53. doi: 10.1016/0165-3806(89)90016-3.

Peripheral competition in the control of sensory neuron numbers in Xenopus frogs reared with a single bilaterally innervated hindlimb.

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Sensory neurons were counted in the hind-limb innervating spinal ganglia on both sides of juvenile Xenopus frogs which, as tadpoles, had had one hind limb bud amputated prior to innervation, and a channel made to allow innervation of the remaining limb bud from both sides. The total number of sensory neurons surviving on the two sides approximated the number on one side of normal frogs, the ipsilateral and contralateral numbers being negatively correlated. These effects differ markedly from the effects on motoneuron numbers, suggesting different control mechanisms of cell death in the two neuronal classes.

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