Flashcards
Individual Neurons
Flashcards do conjunto (12)
- 1—Vm= membrane potential
Dtvm = time constant
Ee - Vm(t) - net potential
Ge(t) = fraction of e channel open at time t
G_i = max conductance if channel fully open - 2When is Inet 01) If current travelling on all channels are stable - cancel each other out
2) At resting - 3—El = equilibrium potential for channel l (leak)
Gl g_l El = leak conductance of overall conductance
- 4—yj = activation value
(-) = threshold
Y - gain parameter (larger - steeper)
- 5What is the membrane potential?The net result is an electric potential difference between inside and outside of the cell
- 6What is the equilibrium channel potential?Amount of electrical potential needed to counteract diffusion
- 7What does I= G(V)?Equilibrium potential
I - channel
G - conductance
V - voltage - 8What is the difference between ANN vs Point NeuronsANN - a single neuron can have excitatory and inhibitory links and weights can change through learning
Point neurons - Excitatory or inhibitory - converted to Vm then further function outputs - 9What is the problem with XX1 function?Discrete spiking rates are highly noises and spiking is unpredictable. Change to Noisy XX1 function
- 10What does resting mean?Resting is where the neuron will stabilise if there is no external activation for a long period of time
- 11What is the refractory period?The suppression of a neuron (below resting) following firing.
- 12What is the rate code output function?A reasonable approximation to the output of an emsemble of neurons rather than a single neuron
Informações
- Descrição
- University Cognitive Neural Networks FlashCards sobre Individual Neurons, criado por unknown_girl em 07-05-2014.
- Criado por
- unknown_girl · mai 2014
- Atualizado
- 19 fev 2016
- Visualizações
- 11
- Avaliação