70
request. All computations were performed using MATLAB version 7.4 (R2007a) on a
Sun Ultra 20 computer with a 2.2 GHz AMD Opteron processor. Detailed simulation
documentation can be found in the Supplementary Material of (Kellems et al., 2010).
Three ion channel models were used in this study. One follows Hodgkin-Huxley
kinetics, while the second augments this model by including an A-type K+ current
with a spatially-varying conductance density given by
Ga(x) = 4.15(1 + τ∕100), (3.22)
where x is the distance (in μm) from the soma. We refer to these models as HH and
HHA, respectively. Parameters for these two models are the same as given in Tables
B.l and B.2. The third model seeks to mimic weakly excitable dendrites, following
the kinetics and spatially-varying conductance densities of (Migliore et al., 1999). We
refer to this model as MIG, and we give its parameters in Table B.3.
3.2.3.1 Computational Notes
Since the soma is large but assumed to be isopotential, its surface area is often
greater than that of any dendritic compartment. A common practice in coding the
solution to (3.2) is to divide each ODE by the surface area of the corresponding com-
partment. While this is mathematically sound, it yields entries in H (and potentially
other quantities) that can vary by orders of magnitude, resulting in poor accuracy
for the reduced system. The solution is to not divide through by surface area, which
More intriguing information
1. PROJECTED COSTS FOR SELECTED LOUISIANA VEGETABLE CROPS - 1997 SEASON2. The name is absent
3. Wirkung einer Feiertagsbereinigung des Länderfinanzausgleichs: eine empirische Analyse des deutschen Finanzausgleichs
4. Consumer Networks and Firm Reputation: A First Experimental Investigation
5. Social Balance Theory
6. Rent Dissipation in Chartered Recreational Fishing: Inside the Black Box
7. The name is absent
8. The migration of unskilled youth: Is there any wage gain?
9. LAND-USE EVALUATION OF KOCAELI UNIVERSITY MAIN CAMPUS AREA
10. A Principal Components Approach to Cross-Section Dependence in Panels