In the simple neural oscillator described in the lecture part 22, what do you expect if we change the time constant of the inhibitory neuron from small to large? 72. (part 22, medium) 105-Final
A. The system does not change its oscillation amplitude.
B. The oscillation stops
C. The system changes from a damped oscillation to an oscillation with a constant amplitude.
D. The oscillation accelerates.
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Which of the following statements is not correct for a memory network described in the lecture part 21? 69. (part 21, difficult)105-Final
A. When an input is similar to a memorized item, the network has a high probability to converge to the state corresponding to the item.
B. The activity vectors that correspond to each memorized item have to be parallel to each other.
C. When the input is not similar to any memorized item, the network is likely to return to the baseline state.
D. The activity corresponding to a memory persists after the stimulus offset.
Which of the following conditions can turn a recurrent network into an input integrator? 66. (part 20, medium) 105-Final
A symmetric network with an eigenvalue smaller than zero
B. The eigenvalues of the network are all zero.
C. A symmetric network with an eigenvalue equal to 1.
D. A recurrent network can never be an input integrator.
If the eigenvalues of a two-dimensional dynamical system are real and positive, 60. (Part 19, easy) 105-Final
A. the system is unstable around the fixed point.
B. the system is stable around the fixed point.
C. the system is not defined at the fixed point.
D. the system is stable globally.
Which of the following statements about the two formulations of the firing rate model is not correct? Formulation 1: r=F(I), τdI/dt=-I+w·u. Formulation 2: τdr/dt=-r+F(w·u). *58. (Part 18, difficult) 105-Final
A. The two formulations are equivalent and can be applied to any condition.
B. The formulation 1 is used when the time scale of the synaptic dynamics is much slower than the membrane dynamics.
C. The formulation 2 is used when the synaptic dynamics is much faster than the membrane dynamics.
D. The formulation 1 describes the dynamics of the synaptic current while the formulation 2 does not.
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