Table 6. V–D gradients in electrophysiological and morphological properties of CA1 neurons.

Neuronal property	V-D change	Linear/Segmented	Slope of linear fit (normalized to range)	Breakpoint location
RMP (mV)	Decrease	Linear	-0.09	n/a
Rin at RMP (MΩ)	Decrease	Linear	-0.1	n/a
Rin at -65mV (MΩ)	Decrease	Linear	-0.04	n/a
Tau (ms)	Decrease	Linear	-0.06	n/a
FR at RMP (Hz)	No change	Linear	-0.007	n/a
Q (RMP)	No change	Linear	-0.003	n/a
FR at -65 mV (Hz)	Decrease	Segmented	n/a	-2.1
Q (-65 mV)	Decrease	Linear	-0.04	n/a
RS (at RMP)	Decrease	Segmented	n/a	-1.8
RS at -65mV	Decrease	Segmented	n/a	0.54
AP threshold (mV)	Decrease	Linear	-0.06	n/a
AP hw (ms)	Decrease	Segmented	n/a	-2
AP amplitude (mV)	Decrease	Segmented	n/a	-1.7
AP max dV/dt (mv/ms)	Decrease	Segmented	n/a	-1.8
Firing freq. (500 pA) (Hz)	Decrease	Segmented	n/a	-0.7
Firing freq. (250 pA) (Hz)	Decrease	Segmented	n/a	-0.633
SFA	Increase	Linear	0.05	n/a
Total dendritic length (mm)	Increase	Linear	0.08	n/a
Apical radial length (mm)	Decrease	Segmented	n/a	-0.41
Number of intersections (proximal SR)	Increase	Segmented	n/a	0.5
Number of intersections (distal SR)	Increase	Segmented	n/a	-0.7
Number of intersections (SLM)	No change	Linear	0.01	n/a
Number of intersections (basal)	Increase	Linear	0.12	n/a

The slopes listed in this table were calculated by normalizing each dataset to its range (minimum and maximum). The slopes of the linear fits to the normalized values are listed in column three. Negative value of slopes corresponds to negative correlation (or decrease) of the neuronal property with ventral-to-dorsal location and positive values correspond to a positive correlation. Breakpoint locations are listed for the neuronal properties that showed segmented gradients along the longitudinal axis.