Table 1.

Resting and active membrane properties of daytime and nighttime VIP+, NMS+, and GRP+ SCN neurons

Firing rate (Hz)Rin (GΩ)Vm (mV)
DayVIP+3.1 ± 0.2a
n = 27
2.2 ± 0.2b
n = 27
−42.9 ± 0.8
n = 25
NMS+3.4 ± 0.4c
n = 19
2.7 ± 0.2d
n = 20
−40.8 ± 1.1e
n = 22
GRP+4.0 ± 0.5
n = 31
3.1 ± 0.3f
n = 18
−40.6 ± 0.5
n = 17
NightVIP+2.0 ± 0.2a
n = 37
1.4 ± 0.1b
n = 22
−43.9 ± 1.1
n = 27
NMS+1.4 ± 0.3c
n = 13
1.9 ± 0.1d
n = 19
−45.4 ± 0.8e
n = 19
GRP+2.9 ± 0.3
n = 25
2.0 ± 0.1f
n = 15
−42.1 ± 0.6
n = 21
  • Values are mean ± SEM; n = number of cells. Rin, input resistance; Vm, membrane potential.

  • a-fValues in daytime and nighttime VIP+(a,b), NMS+(c,d,e), and GRP+(f) SCN neurons are significantly different (a,c,d,e,fp < 0.01; bp < 0.05; Kolmogorov–Smirnov test).