Dopaminergic (DA) neuron model with a morphologicaly realistic dendritic architecture. The model captures several salient features of DA neurons under several pharmacological manipulations and exhibits depolarization block for sufficiently high current pulses into the soma. The model refers to the paper: Anna Y. Kuznetsova, Marco A. Huertas, Alexey S. Kuznetsov, Carlos A. Paladini and Carmen C. Canavier (2010) Regulation of firing frequency in a computational model of a midbrain dopaminergic neuron J Comput Neurosci. 2010 Jun;28(3):389-403. The files included here correspond to the morphologically realistic reconstructed model (see Figure 1 in paper) and reproduce results presented in the paper: 1) Fig2a2.hoc Figure 2 (a2) 2) Fig2b2.hoc Figure 2 (b2) 3) Fig2f2.hoc Figure 2 (f2) 4) Fig6a_solid_trace Figure 6a: solid line corresponding to 100 pA stimulation current 5) Fig6a_dashed-line_trace Figure 6a: dashed line corresponding to 500 pA stimulation current The first three examples illustrate spontaneous firing of the model DA neuron in control (1) and after blocking SK channel (2) and Na channels (3). Last two files show the response of the model DA neuron to simulated current pulse to the soma for 100 pA (4) and 500 pA (5). In the last case one can observe depolarization block. You can run the simulation either by auto-launching from ModelDB, or by first compiling the mechanisms as follows: a) Under LINUX Type nrnivmodl Then type nrngui mosinit.hoc b) Under Windows Run mknrndll to compile the mod files in the top level directory. c) Under MAC - OS X Drag and drop the archive file on the mknrndll icon (in the NEURON application folder). ------------------------------ If running the individual files listed above: Once Neuron has been started on your platform select in the main manu Tools -> RunControl Graph -> Voltage axis then select File -> load hoc and choose the file you want to run. Finally press Init & Run. ------------------------------ If auto-launched then press a button corresponding to the figure desired and you can generate figures like these: Fig 2a2: Fig 2b2: Fig 2f2: Fig 6a (solid trace): Fig 6a (dashed trace):