Figure 7.

Projection of a single upward INC IBN to the OPN region with its descending axon collateral. A, Experimental setup. Intracellular recording was made from a neuron in the left INC. B–E, Antidromic spikes were evoked from the OPN region (B), INC (C), FFH (D), and IV nucleus (E) on the contralateral side. F,G, EPSPs with spikes were evoked from the ipsilateral SC (the strongest input from SC1) (F). Disynaptic IPSPs were evoked from the contralateral SC except SC5 (G). Calibration in D also applies to B,C and E–G.