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Article: Properties of solitary tract neurones responding to peripheral arterial chemoreceptors.

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Paton JF; Deuchars J; Li YW; Kasparov S
Neuroscience, 2001


Table 1Some electrophysiological properties of peripheral chemoreceptive NTS neurones
Excitatory responseInhibitory responseRespiratory modulated
n38108
R.M.P. (mV)−53.0±0.7−51.8±1.7−51.2±1.9
RIN (MΩ)275±18265±50298±32
Ongoing activity (Hz)2.4±0.41.9±0.72.4±0.4
Solitary tract stimulationEPSPIPSPEPSP
Latency (ms)5.2±0.423.8±4.34.4±1
n1746
Response to DP pulses (# tested):3085
Steady state1553
Augmenting822
Adapting710
Response to HP pulses:
Rebound excitation20/321/85/6
Delayed excitation11/322/80/6
There was no significant difference in resting membrane potential (R.M.P.), membrane input resistance (RIN) or ongoing activity between neurones displaying different synaptic responses to peripheral chemoreceptor stimulation. The latency of synaptic inputs to inhibitory response group cells was longer than those to neurones in the other two groups (P<0.05). Many excitatory response and respiratory modulated neurones exhibited rebound excitation following a HP pulse. Note: three of the 14 neurones in the excitatory response group displayed EPSP–IPSP sequence whereas three of seven neurones from the inhibitory group exhibited EPSP–IPSP to solitary tract stimulation. Abbreviations: DP, depolarising pulse injection; HP, hyperpolarising pulse injection; n, number of NTS neurones.

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