Search found 36 matches

by shwetakgp
Tue Aug 27, 2013 1:26 pm
Forum: Getting started
Topic: questions regarding myelinated axon
Replies: 4
Views: 1897

Re: questions regarding myelinated axon

dear ted,
please reply to my query
by shwetakgp
Mon Aug 26, 2013 10:30 am
Forum: Getting started
Topic: questions regarding myelinated axon
Replies: 4
Views: 1897

Re: questions regarding myelinated axon

i have understood about those things from the paper. i want to make a cell with myelinated axon.i tried to include it by doing some changes but i cnt figure out much. how should i include this into a cell. i tried this. i have not made many changes i just added morphology of soma and connected MYSA[...
by shwetakgp
Fri Aug 23, 2013 10:25 am
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

please reply to my query
by shwetakgp
Thu Aug 22, 2013 11:56 am
Forum: Getting started
Topic: questions regarding myelinated axon
Replies: 4
Views: 1897

questions regarding myelinated axon

dear ted, i was studying about myelinated axon from mclntyre(2002) and couldnt understand some things- Ra=rhoa*(1/(paraD1/fiberD)^2)/10000 cm=2*paraD1/fiberD insert pas g_pas=0.001*paraD1/fiberD e_pas=v_init insert extracellular xraxial=Rpn1 xg=mygm/(nl*2) xc=mycm/(nl*2) how have these terms been ca...
by shwetakgp
Thu Aug 22, 2013 11:53 am
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

dear ted, i wanted to make a dsic electrode so that i can vary its dimensions so that i can vary its dimensions and see the effects. i hope that is feasible.... in the code which you earlier send me asking these paprameters given the orientation of the electrode's axis, calculate angular orientation...
by shwetakgp
Wed Aug 21, 2013 2:36 pm
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

please reply to my previous query . i was studying about myelinated axon and couldnt understand some things- Ra=rhoa*(1/(paraD1/fiberD)^2)/10000 cm=2*paraD1/fiberD insert pas g_pas=0.001*paraD1/fiberD e_pas=v_init insert extracellular xraxial=Rpn1 xg=mygm/(nl*2) xc=mycm/(nl*2) how have these terms b...
by shwetakgp
Tue Aug 20, 2013 2:17 pm
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

i wanted to create a disc electrode because i have to compare my results with experimental results and practically i cant assume elctrode to be a point electrode. Is there any way i could create an electrode with dimensions and vary its dimensions( which, for the disc i thought to be radius) to see ...
by shwetakgp
Mon Aug 19, 2013 2:15 pm
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

how is this for a start ....i made changes in calcrxc.hoc. I is the stimulating current emitted by the elctrode. The analytical fromula of the current through electorde has been derived from simple current electricity equations of electric field for a disc and relation between current density and el...
by shwetakgp
Sun Aug 18, 2013 3:28 pm
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

i got an expression of current using a charge density sigma, resistivity rho, diameter and distance of electrode from center of soma. should i put this current equal to is_xtra as the current from the expression equals to stimulating current produced by the electrode????????? in case of point electr...
by shwetakgp
Thu Aug 15, 2013 10:33 am
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

dear ted,
please reply to my query and let me know if making a disc electrode that way could work
by shwetakgp
Sun Aug 11, 2013 3:18 pm
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

sorry my mistake , milliseconds . is it ok for axon and soma to have same threshold current value ??? i mentioned this earlier too... could i do this way: To make a disc electrode i thought that i should start with a point and take a current density sigma. taking the point, i can assume a disc of ra...
by shwetakgp
Tue Aug 06, 2013 9:16 am
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

dear ted,
my axon has the same value of threshold current but it shows a spike 6 to 7 seconds after the spike of soma. is this okey?

and for making a disc electrode do i need morphometric data of the neuron or a three dimensional model of the neuron??
by shwetakgp
Fri Jul 19, 2013 5:08 pm
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

i am using xtra.mod from the extracellular stimulation and recording.zip. so what reference should i mention and how?
by shwetakgp
Fri Jul 19, 2013 12:06 pm
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

dear ted, the values of conductances of the ion channels which are already present in the cell builder, are they the default values of the conductance??? if i use those values do i have to mention any reference ... if yes then what...in every paper i get the value of conductance of na,k and leakage ...
by shwetakgp
Wed Jul 17, 2013 11:45 am
Forum: Other questions
Topic: graphs in extracelllular stimulation
Replies: 47
Views: 9331

Re: graphs in extracelllular stimulation

dear ted, if i have a the value of area of the dendritic field . Is it okey if i draw a circular section of area equal to dendritic field area connected to the soma at one side?????? or a circular segment equal the area of soma plus dendritic field area??. I could consider the all the dendrites are ...