Erratum.
In the report "Alteration in connections between muscle and anterior horn motoneurons after peripheral nerve repair" by T. M. Brushart and M.-M. Mesulam (9 May, p. 603), the key to cell types in Fig. 1 was inadvertently omitted. The dashed lines refer to (A) right peroneal, (B to D) postoperative, and (E) peroneal cells. The solid lines refer to (A) left peroneal, (B to D) control, and (E) tibial cells.