Abstrucf A two-dimensional 24-channel wire-microelectrode array was inserted into the peroneal nerve of the rat during acute experiments. The electrodes in the array are on a regular grid of 6 by 4 electrodes; inter-electrode spacing is 120 pm. For each of the electrodes in the array the corresponding twitchforce recruitment curve was recorded from the extensor digitorum longus muscle (EDL). A complete set of 24 recruitment curves Is presented. The shape of the recruitment curves varies among the electrodes in the array. This supports previous findings which suggest a different motor unit recruitment order for stimulating electrodes at different intraneural positions.
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