Fig. 8.

Coordination between left and right metathoracic motoneuron bursts during fictive motor patterns in a mesothoracic–abdominal preparation. A, Spontaneous motor pattern. B, Examples of the most common type of coordination during tactile stimulation of the left ear. The first large levator burst began 0.9 sec after the onset of tactile stimulation. C, Example of synchronous left and right levator bursts during tactile stimulation of the right ear. Tactile stimulation began before the period illustrated and continued throughout this period. The first large levator burst began 10.4 sec after the onset of tactile stimulation. L andR indicate left and right trochanteral levator bursts, respectively, with simultaneous activation of the contralateral trochanteral depressors. Asterisk indicates synchronous levator bursts. Other conventions are as in Figure 2.