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Article: Organization of GABAergic inhibition in the motor output layer of the superior colliculus.

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Sooksawate T; Isa K; Behan M; Yanagawa Y; Isa T
Eur. J. Neurosci., 2011


Table 1.   Summary of the electrophysiological and morphological properties of the subpopulations of GABAergic neurons in the intermediate gray layer of mouse superior colliculus classified by their axon trajectories
 Intralaminar interneurons (n = 45)Interlaminar interneurons (n = 44)Tectofugal and commissural neurons (n = 49)
Local (n = 23)Horizontal (n = 22)V-SGS (n = 22)V-SGP (n = 7)V-SGS and SGP (n = 15)Commissural projection (n = 8)Ventral projection (n = 34)Multiple projection (n = 7)
  1. SGS, superficial gray layer; SGP, deep gray layer; V-SGS, vertical projection to SGS; V-SGP, vertical projection to SGP; V-SGS&SGP, vertical projection to SGS and SGP.

Firing pattern
 Regular spiking00000010
 Fast spiking1010154126223
 Burst spiking109532283
 Late spiking33201001
 Rapid inactivation00000030
Spontaneous firing16 (70%)19 (86%)15 (68%)6 (86%)11 (73%)6 (75%)24 (71%)3 (43%)
Resting membrane potential (mV)−59.7 ± 1.18−62.1 ± 1.17−62.6 ± 1.36−63.1 ± 2.82−65.3 ± 1.62−57.0 ± 2.56−61.2 ± 1.04−59.3 ± 1.71
Membrane capacitance (pF)9.15 ± 0.4811.75 ± 1.1210.19 ± 0.868.26 ± 0.7610.28 ± 0.9210.82 ± 1.5413.67 ± 1.0515.31 ± 2.59
Input impedance (MΩ)1575 ± 115.41335 ± 103.71282 ± 100.31448 ± 190.71230 ± 135.51324 ± 218.31099 ± 88.23880 ± 66.05
Soma size
 Diameter (μm)
  Major (range)11.57 ± 0.34 (8.41–15.0)11.29 ± 0.05 (7.97–16.4)11.95 ± 0.41 (8.97–16.5)12.59 ± 1.02 (10.2–18.3)12.25 ± 0.61 (8.12–15.5)16.97 ± 2.47 (12.3–33.4)15.55 ± 0.56 (11.0–26.0)16.33 ± 1.61 (11.7–24.8)
  Minor (range)8.02 ± 0.26 (5.41–9.98)8.45 ± 0.24 (5.96–11.7)8.06 ± 0.25 (6.34–11.0)8.44 ± 0.42 (6.96–9.94)8.65 ± 0.32 (6.32–11.4)10.40 ± 0.67 (7.40–13.4)10.43 ± 0.33 (7.58–15.1)10.42 ± 0.61 (8.26–12.5)
Soma area (μm2)70.25 ± 3.2670.38 ± 4.7770.96 ± 3.2678.30 ± 8.2677.33 ± 5.49111.7 ± 8.85125.1 ± 5.65129.3 ± 10.8
Soma shape
 Multipolar91210476225
 Fusiform63935161
 Horizontal25001030
 Round62302120
 Pyramidal00000011

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