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. Tissue Tracking Imaging for Identifying the Origin of Idiopathic Ventricular Arrhythmias: A New Role of Cardiac Ultrasound in Electrophysiology2. The name is absent
3. The name is absent
4. Spatial agglomeration and business groups: new evidence from Italian industrial districts
5. Life is an Adventure! An agent-based reconciliation of narrative and scientific worldviews
6. The name is absent
7. The name is absent
8. The name is absent
9. The name is absent
10. THE USE OF EXTRANEOUS INFORMATION IN THE DEVELOPMENT OF A POLICY SIMULATION MODEL