Figure 9.

Network activity in hemi-CNS induced by local microperfusion of NMDA onto the hindbrain in saline containing 1 μm strychnine and 20 μm SR95531. A, dIN is depolarized and starts to fire before rhythmic s.c. activity starts. B, Distribution histogram of the intervals between s.c. burst triggered events in A. a1 and a2 are peak and trough counts respectively used for calculating coefficient of rhythmicity (Cr = 0.99 for record in A). T is used for calculating rhythm frequency. C, A motoneuron is only slightly depolarized and starts to fire when rhythmic s.c. activity starts.