membrane_definitions.h

/*
# =============================================================================
# Copyright (c) 2016 - 2021 Blue Brain Project/EPFL
#
# See top-level LICENSE file for details.
# =============================================================================.
*/

/* /local/src/master/nrn/src/nrnoc/membdef.h,v 1.2 1995/02/13 20:20:42 hines Exp */

/* numerical parameters */
#define DEF_nseg   1           /* default number of segments per section*/
#define DEF_dt     .025        /* ms */
#define DEF_rev_dt 1. / DEF_dt /* 1/ms */
#define DEF_secondorder                           \
    0 /* >0 means crank-nicolson. 2 means current \
      adjusted to t+dt/2 */

/*global parameters */
#define DEF_Ra      35.4 /* ohm-cm */ /*changed from 34.5 on 1/6/95*/
#define DEF_celsius 6.3               /* deg-C */

#define DEF_vrest -65. /* mV */

/* old point process parameters */
/* fclamp */
#define DEF_clamp_resist 1e-3 /* megohm */

/* Parameters that are used in mechanism _alloc() procedures */
/* cable */
#define DEF_L          100. /* microns */
#define DEF_rallbranch 1.

/* morphology */
#define DEF_diam 500. /* microns */

/* capacitance */
#define DEF_cm 1. /* uF/cm^2 */

/* fast passive (e_p and g_p)*/
#define DEF_e DEF_vrest /* mV */
#define DEF_g 5.e-4     /* S/cm^2 */

/* na_ion */
#define DEF_nai 10.                /* mM */
#define DEF_nao 140.               /* mM */
#define DEF_ena (115. + DEF_vrest) /* mV */

/* k_ion */
#define DEF_ki 54.4               /* mM */
#define DEF_ko 2.5                /* mM */
#define DEF_ek (-12. + DEF_vrest) /* mV */

/* ca_ion -> any program that uses DEF_eca must include <math.h> */
#define DEF_cai 5.e-5 /* mM */
#define DEF_cao 2.    /* mM */
#include <math.h>
#define DEF_eca 12.5 * log(DEF_cao / DEF_cai) /* mV */

/* default ion values */
#define DEF_ioni 1. /* mM */
#define DEF_iono 1. /* mM */
#define DEF_eion 0. /* mV */