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. 2002 Jul 15;22(14):6228–6238. doi: 10.1523/JNEUROSCI.22-14-06228.2002

Fig. 2.

Fig. 2.

B40 is critical for expression of ingestive activity patterns of radula closure motor neuron B8. Motor programs were elicited by stimulation of CBI-2 with brief current pulses. Thethree panels in A and Brepresent two series of three episodes of CBI-2 stimulation (2 min apart) in two different preparations. A, Stimulation of CBI-2 alone consistently elicited ingestive programs (A1, A3) with strong activity in the ipsilateral B40 and the contralateral B40 (c-B40), because B8 fired high-frequency bursts during retraction (filled bar), which follows protraction (I2,open bar). Hyperpolarization of both B40s reduced activity of B8 during retraction and increased activity of B8 during protraction, i.e., made the program more egestive (A2).Dotted lines in B8 traces show resting membrane potentials. B, Both the ipsilateral B34 and the contralateral B34 (c-B34) were strongly active in CBI-2-elicited ingestive programs (B1,B3), but hyperpolarization of both B34s had little impact on activity pattern of B8 (B2).