membdef.h

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/* /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_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 */