The figure shows a nerve cell stimulated with 3 excitatory and 1 inhibitory presynaptic input. The peak voltage change created by each stimulus input is 7 mV. Suppressor input causes inhibition of 4 mV. The graded potentials generated during the warnings are damped within 10 ms. The distance of the entrances from the axon hillock zone will be considered equal. (35P)
a) What can be said about the action potential formation in case of simultaneous stimulation at 4 inputs?
b) If only 3 excitatory inputs produce a warning with an interval of 1 ms, evaluate the action potential formation.
c) What can be said about the action potential formation if we assume that only one of the 3 excitatory inputs generates 10 mV stimuli (the other two are 7 mV) and 3 excitatory inputs are stimulated simultaneously? What are the differences you expect with the results you get in b.
d) What can we say about the action potential formation if it is stimulated 4 times at 1 ms intervals with equal intensity to create action potential in 4 inputs.

Transcribed Image Text:

Presynaptic Inputs (excititory EPSP IPSP Postaynaptic cell Action Potential? Trigger Zone (ilock) Presynaptic input (inhibitory) Presynaptic Inputs (excititory EPSP IPSP Postaynaptic cell Action Potential? Trigger Zone (ilock) Presynaptic input (inhibitory)

Answer rating: 100% (QA)

So here basically there are three EPSP excitatory post synaptic potential and one IPSP inhibitory post synaptic potential Voltage generated by each IPSP stimuli 7 mV Voltage generated by the IPSP stim... View the full answer