Cell name | Axon path | Cell size (μm); color | Electrophysiology | Spontaneous spike and PSPs activity | Activity during avoidance turns induced by LOVN stimulation | ||
---|---|---|---|---|---|---|---|
RP (mV) | SH (mV) | SD (mS) | |||||
A4 | i-aCPC | 40–55;
translucent | −47.3 ± 3.2 | 80.6 ± 6.4 | 3.4 | 2–4 Hz (80%2-a), slow bursting2-b; IPSPs, <6 mV (85%) | Only active (up to 14 Hz) to ipsilateral stimulus (note, in contrast, As1–4 are active to bilateral stimuli) |
A7 | i-aCPC | 35–50;
translucent | −45.9 ± 4.5 | 73.4 ± 8.5 | 3.6 | Active at <6 Hz (60%); IPSPs, 1–7 mV (95%) | Not active during turns, but active during withdrawal phase that occurs before turns |
Data are expressed as mean ± SEM.
i-aCPC, Ipsilateral anterior cerebropedal connective; LOVN, large oral veil nerves; PSPs, postsynaptical potentials; BWN, body wall nerves; RP, resting potential; SH, spike height; SD, Spike duration at half amplitude.
↵F2-a Percentage of preparations observed.
↵F2-b Slow bursting has been observed previously in swim interneurons As2/3 (Jing and Gillette, 1999, their Table 1). Slow bursting in A4 has similar burst duration (40 sec), period (80–160 sec) with that of As2/3, but typically has higher peak spike frequency (up to 11 Hz).