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Article: Short-term modulation at synapses between neurons in laminae II-V of the rodent spinal dorsal horn.

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Zhang W; Schneider SP
J. Neurophysiol., 2011


Table 2.

Comparison of unitary postsynaptic potentials at connections in the superficial (LII) versus deep (LIII–V) dorsal horn

LII LIII–V
Means ± SD n Means ± SD n
EPSPs
    Failure, % 6 ± 9 7 10 ± 15 11
    Amplitude, mV 3.5 ± 2.6 6 2.0 ± 2.0 11
    Rise time, ms 4 ± 2 6 5 ± 5 10
    Decay time constant, ms 341 ± 697 6 44 ± 25 10
    Paired-pulse ratio 0.74 ± 0.43 7 0.73 ± 0.26 7
IPSPs
    Failure, % 38 ± 24* 12 22 ± 19 14
    Amplitude, mV −1.4 ± 0.8 12 −1.5 ± 0.7 13
    Rise time, ms 13 ± 11† 10 8 ± 4 14
    Decay time constant, ms 60 ± 27 6 243 ± 405 10
    Paired-pulse ratio 1.26 ± 0.61 12 1.12 ± 0.32 11
Ratio of number of inhibitory connections to excitatory connections 1.7:1 1.3:1

  • ↵* Significantly different from EPSPs at LII connections (P = 0.0009);

  • ↵† significantly different from EPSPs at LII connections (P = 0.03).


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