What is the sum total of firings called?

What is the sum total of firings called?

• A. Resting membrane potential
• B. Synaptic potential
• C. Action potential frequency
• D. Central integrated state of neuron

Answer: (D)

The concept being tested is how a neuron combines many incoming signals to decide whether to fire. Neurons don’t respond to a single input in isolation; they sum excitatory and inhibitory inputs across different synapses (spatial summation) and over time (temporal summation) at the axon hillock. This integration creates a single, overall state—whether the neuron is poised to fire or not—often described as the central integrated state of the neuron. When this integrated input reaches threshold, an action potential is produced; if not, the neuron remains at its resting condition. Resting membrane potential is simply the baseline voltage when the neuron is not actively processing inputs. A synaptic potential refers to the potential change from a single synapse. Action potential frequency describes how often spikes occur, not the neuron's overall integrated state. So the central integrated state best captures the idea of the sum total of firings as the neuron's combined decision-making state.

The concept being tested is how a neuron combines many incoming signals to decide whether to fire. Neurons don’t respond to a single input in isolation; they sum excitatory and inhibitory inputs across different synapses (spatial summation) and over time (temporal summation) at the axon hillock. This integration creates a single, overall state—whether the neuron is poised to fire or not—often described as the central integrated state of the neuron. When this integrated input reaches threshold, an action potential is produced; if not, the neuron remains at its resting condition.

Resting membrane potential is simply the baseline voltage when the neuron is not actively processing inputs. A synaptic potential refers to the potential change from a single synapse. Action potential frequency describes how often spikes occur, not the neuron's overall integrated state. So the central integrated state best captures the idea of the sum total of firings as the neuron's combined decision-making state.