Some of the specific parameters were experimentally estimated for real neurons.
The specific axial resistance RA is 0.6-1 Ω.m (Miller, 1980; Miller et al., 1985;
Fleshman et al., 1988). The value of the specific membrane resistance RM is
0.5-10 Ω.m2 (Miller et al., 1985; Cauller, 2003) and for the specific membrane
capacitance CM it is 0.01 F/m2 (Miller et al., 1985).
If we introduce a rectangular electric impulse with voltage V, then the voltage
across the membrane changes according to the cable equation:
(59)
-λ2
∂2V
∂x2
∂V
+ τ + V = 0
∂t
where
(60)
τ=rmcm=RmCm=RMCM
is the time constant (τ) and
(61)
λ2 = rm
is the square of the space constant (λ).
In neurons ri » re (Sajda, 2002) so we can write:
λ=
dRM
4 RA
(62)
35
More intriguing information
1. The name is absent2. The name is absent
3. The Role of Immigration in Sustaining the Social Security System: A Political Economy Approach
4. Target Acquisition in Multiscale Electronic Worlds
5. The name is absent
6. Developments and Development Directions of Electronic Trade Platforms in US and European Agri-Food Markets: Impact on Sector Organization
7. On the Relation between Robust and Bayesian Decision Making
8. Evaluation of the Development Potential of Russian Cities
9. Learning and Endogenous Business Cycles in a Standard Growth Model
10. Foreword: Special Issue on Invasive Species