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 */

#if SEJNOWSKI
/* fsyn/fcon */
#define DEF_spikethresh -10.     /* mV (fcon) */
#define DEF_tablesize   200      /* size of lookup table for alpha fxns (both) */
#define DEF_max_syn     10000    /* max synapses per fsyn call */
#define DEF_max_con     1000     /* sqrt of max connectivity for fcon */
#define MIN_DELAY       .5         /* min delay for randomly generated delays (fcon) */
#define MIN_GMAX        0.         /* min gmax for randomly generated gmax (both) */
#define MIN_ISI   1.0        /* min interval between syn activation (msec) (both) */
#define QLEN      10    /* max number of spikes in epspq (fcon) */
/* for use with flag() */
#define SYN_TYPE_FLAG   (int)1     /* Stimulus type (fsyn) */
#define TRAIN_FLAG      (int)2     /* Stimulus train (fsyn) */
#define DENSE_FLAG      (int)1     /* Randomize pre, post or both (fcon) */
#define SELF_CON_FLAG   (int)2     /* Allow for self connections (fcon) */
#define CON_TYPE_FLAG   (int)3     /* Stimulus type (fcon) */

/* used by parameter dump when dump_flag == 1. (see pdump.c) */
#define LINE_LEN        78         /* line length */
#define IFSEC_INDENT    4          /* how far to indent ifsec */
#define MECH_INDENT     22         /* how far from begin of line to indent mechs */
#define MAX_BLANK       MECH_INDENT + 10 /* max blanks stored for use in indenting */

#endif

/* 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 */