Timeline of the physiological recordings for neurotoxin injection experiments.

<p><b><i>A</i></b>, Timeline of the low frequency stimulation experiment. <b><i>B</i></b>, Timeline of the high frequency stimulation experiment. In <i>A</i> and <i>B</i>, the black arrows () mark the time when test stimuli (Phasic – three single pulses at 0.1 Hz; tonic – three, 200 Hz, 15- pulse trains at 0.1 Hz) were applied following injection, and below each timeline is a diagram depicting the stimulation protocol for phasic and tonic recordings (in <i>B</i>, an example of the high frequency stimulation (HFS) protocol is given from time elapsed mark of 120 min to 180 min). Baseline recording (BR): Phasic – three single pulses at 0.1 Hz every 10 min; tonic – three, 200 Hz, 15-pulse trains at 0.1 Hz every 10 min. High frequency stimulation (HFS): Phasic – burst stimuli of 10 Hz for 2 min with an inter-burst interval of 2 min; tonic – burst stimuli of 150 Hz for 30 sec with an inter-burst interval of 10 sec. INJ – injection, RP – rest period.