Article: Morphological and electrophysiological properties of atypically oriented layer 2 pyramidal cells of the juvenile rat neocortex.

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van Brederode JF; Foehring RC; Spain WJ
Neuroscience, 2000

Table 1Overview of morphological and electrophysiological properties of sideways-oriented layer 2 pyramidal cellsa

Cell no.	Morphology	Diameter (μm)	Vrest (mV)	Rn peak (MΩ)	Rn ss (MΩ)	Sag ratio	tau (ms)	Ir (pA)	AP height (mV)	AP theshold (mV)	AP half-width (ms)	fAHP	fADP	mAHP	Firing
1	obl	11.9	−74	318	303	0.87	10	26	91	24	0.6	yes	yes	yes	initial burst
2	obl	8.0	−75	392	382	0.87	54	27	80	30	1.2	no	no	yes	rs
3	obl	12.6	−61	780	644	0.74	60	18	71	23	0.8	yes	yes	yes	rs
4	obl	12.4	−81	114	102	0.93	17	207	108	35	0.7	yes	no	yes	rs
5	obl	11.4	−68	111	98	0.88	27	158	94	24	0.9	yes	no	yes	rs
6	obl	14.5	−73	104	101	0.96	20	194	104	35	1.0	yes	no	yes	rs
7	obl	9.4	−77						95	25	0.7	yes	no	yes	rs
8	long	12.6
9	long	10.8	−78	114	113	0.94	37	42	77	38	1.2	yes	no	yes	single spike
10	long	15.8	−73	293	272	0.86	46	44	99	31	1.2	yes	yes	yes	rs
11	long	14.1	−63	172	121	0.89	36	133	89	17	1.0	yes	no	yes	rs
12	long	11.8	−77	313	285	0.80	28	100	85	24	1.3	yes	no	yes	rs
13	long	7.3	−72	279	220	0.82	29	100	93	32	0.9	yes	no	yes	rs
14	short	9.8	−86	278	267	0.94	33	78	91	41	1.0	yes	no	yes	rs
15	short	16.7	−62						77	22	1.2	yes	no	yes
16	short	12.3	−70	181	158	0.91	39	30	85	32	1.2	yes	no	yes	doublet
17	short	12.6	−56	318	255	0.97	10	78	80	18	0.9	yes	yes	yes	rs
Average		12.0	−70.8	269.1	237.2	0.88	31.9	93.0	88.7	28.2	1.0
S.E.M.		0.6	2.0	46.9	39.7	0.02	4.0	17.6	2.6	1.8	0.05

aObl, short and long refer to oblique, short and long horizontal pyramids, respectively; Diameter=average of the length of the long and short soma axes; Vrest=resting membrane potential; Rn peak and Rn ss were calculated from peak (Vpeak) and steady-state (Vss) voltage responses to small hyperpolarizing current pulses; Sag ratio=Vpeak/Vss calculated from 20–30mV hyperpolarizing current pulses (500–1000ms); tau=slowest time constant determined from initial voltage responses to small, 500–1000ms hyperpolarizing current pulses; Ir=rheobase current, minimum current required to fire a single action potential from Vrest; AP height=peak action potential amplitude measured from Vrest; AP threshold=action potential threshold relative to Vrest measured from the inflection point just prior to the action potential upstroke; AP half-width=width of the action potential measured at a point halfway between threshold and peak; rs=regular spiking; Afterpotentials (fAHP, fADP and mAHP) were measured from action potentials evoked by brief (3–5ms) current pulses.

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Inferred neuron-electrophysiology data values

Neuron Type	Neuron Description	Ephys Prop	Extracted Value	Standardized Value	Content Source
Other	sensorimotor cortex sideways-oriented layer 2 pyramidal cells	cell diameter (μm)	12.0 (17)	12.0 (um)	Data Table
Other	sensorimotor cortex sideways-oriented layer 2 pyramidal cells	resting membrane potential (mV)	-70.8 (17)	-70.8 (mV)	Data Table
Other	sensorimotor cortex sideways-oriented layer 2 pyramidal cells	sag ratio	0.88 (17)	0.88 (ratio)	Data Table
Other	sensorimotor cortex sideways-oriented layer 2 pyramidal cells	membrane time constant (ms)	31.9 (17)	31.9 (ms)	Data Table
Other	sensorimotor cortex sideways-oriented layer 2 pyramidal cells	rheobase (pA)	93.0 (17)	93.0 (pA)	Data Table
Other	sensorimotor cortex sideways-oriented layer 2 pyramidal cells	spike amplitude (mV)	88.7 (17)	88.7 (mV)	Data Table
Other	sensorimotor cortex sideways-oriented layer 2 pyramidal cells	spike threshold (mV)	28.2 (17)	-28.2 (mV)	Data Table
Other	sensorimotor cortex sideways-oriented layer 2 pyramidal cells	spike half-width (ms)	1.0 (17)	1.0 (ms)	Data Table