Table 2.

Electrophysiological properties of RA projection neurons

Stimulus– response function (mV · msec−1 · μA−1)Response threshold (μA)RInput (MΩ)Baseline firing rate (Hz)Current–frequency relation (Hz/nA)Accommodation rate (@400 pA, Hz/ISI)Spontaneous EPSC amplitude (<30 pA), pASpontaneous EPSC frequency (Hz)RSeries(MΩ)
Fledgling89  ± 149.254.7  ± 7.3−0.93  ± 0.13
(n = 7)(1)(6)(4)
Juvenile0.070  ± 0.017217  ± 5186  ± 712.0  ± 0.867.3  ± 3.5−0.44  ± 0.058.9  ± 0.10.27  ± 0.0620.8  ± 0.5
*p < 0.01a(2013 events  from 14 cells)
(n = 12)(12)(21)(13)(23)(18)(13)(13)
Adult0.178  ± 0.05158  ± 1691  ± 1515.3  ± 2.070.8  ± 3.4−0.39  ± 0.06
**p < 0.05a**p < 0.02a*p < 0.04b*p < 0.01a
(n= 8)(8)(9)(9)(19)(14)
LMAN-lesioned juvenile0.169  ± 0.03585  ± 2082  ± 711.7  ± 0.670.9  ± 4.5−0.50  ± 0.089.8  ± 0.10.32  ± 0.1221.1  ± 0.5
**p< 0.01a**p < 0.04a**p< 0.0001a
(n= 13)(13)(18)(9)(19)(18)(1692 events  from 8 cells)(7)(7)
  • All values: mean ± SEM. *Versus fledgling; **versus juvenile control; statistically significant differences inbold.

  • F2-a Mann–Whitney U test: used when one or more of the distributions under comparison was significantly non-normal based on the Shapiro-Wilk test.

  • F2-b Two-tailed Student's t test assuming equal variance: used when both distributions were normal and their variances equal.