;; Cerebellar Purkinje Cell: resurgent Na current and high frequency
;; firing (Khaliq et al 2003).

(nemo-model K3

  ((input v 
	  (cai from ion-pools)
	  (ica from ion-currents))

   (const ena = 60)
   (const ek = -88)
   (const ca0 = 1e-4)
   (component (type gate-complex) (name K3)
   ;; HH slow TEA-insensitive Purkinje potassium current

	      (component (type gate)

			 ;; constants

			 ;; rate functions

			 (K3_v = (v + 11)) ;; account for junction potential

			 (K3_minf = 
  		           (let ((mivh -16.5)
				 (mik  18.4))
			     (1 / (1 + exp ((neg(K3_v - mivh)) / mik)))))


			 (K3_mtau =
			     ((1e3) * (0.000796 + 1.0 / (exp ((K3_v + 73.2) / 11.7) + exp ((K3_v - 306.7) / -74.2)))))
			 
			 (hh-ionic-gate 
			  (K3  ;; ion name: exported variables will be of the form {ion}_{id}
			   (initial-m  (K3_minf))
			   (m-power    4)
			   (h-power    0)
			   (m-inf      (K3_minf))
			   (m-tau      (K3_mtau))))
			 
			 )
	      
	      (component (type pore)
			 (const  gbar_K3  =  0.004)
			 (output gbar_K3 ))
	      
	      (component (type permeating-ion) (name k)
			 (const e_K3 = ek)
			 (output e_K3 ))
	      
	      ) ;; end K3 current

))