15 Questions
Which of the following is a common transformation in the passing of information from one neuron to the next in a sensory pathway?
Amplification of differences in the activity of neighboring neurons
What is lateral inhibition?
A mechanism where neighboring cells inhibit one another
What is the firing rate of cell d when a stimulus is applied to its receptive field?
10 spikes/sec
What is the output activity of cell D if the input activity of cell d is 10?
10
What is the contrast in activity between neuron D and its neighbors C and E?
10 versus 5 spikes/sec
What is the firing rate of all neurons in the absence of stimulation?
5 spikes/sec
What is the synaptic gain factor used in the output activity calculation of the dorsal column nucleus cells?
1
According to the text, what is the synaptic gain of the inhibitory synapses in Figure B?
-1
What is the effect of the inhibitory synapses on the activity of cell D compared to its neighbors C and E?
The activity in cell D is higher than its neighbors
How is the activity of each cell calculated in Figure B?
By multiplying the input to each synapse by its synaptic gain
What is the contrast in activity between neuron D and its neighbors C and E in Figure B?
20 versus 0 spikes/sec
What is the synaptic gain of the excitatory synapses in Figure B?
1
What is the effect of the inhibitory synapses on the activity of each cell in Figure B?
The activity of each cell is decreased
What is the effect of adjusting the gain of the excitatory synapses in Figure B?
It increases the activity of each cell
What is the difference in activity between neuron D and its neighbors C and E in Figure B?
20 spikes/sec
Test your knowledge on lateral inhibition, a process in which differences in activity between neighboring neurons are amplified, leading to contrast enhancement in sensory pathways. Explore how this phenomenon occurs in retinal ganglion cells and its impact on photoreceptor input.
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