Spatial Summation Is Characterized By

question 74

Multiple Choice

Spatial summation is characterized by:

• A) several presynaptic neurons releasing neurotransmitters simultaneously.
• B) several presynaptic neurons releasing neurotransmitters in a sequential pattern.
• C) several postsynaptic neurons receiving sequential inputs from several presynaptic neurons.
• D) a single presynaptic neuron firing multiple times in rapid succession.
• E) a single presynaptic neuron directly contacting several postsynaptic neurons.

---

Definitions:

Extinction

In behavioral psychology, the gradual decrease and eventual elimination of a conditioned response when it is no longer reinforced.

Unconditioned Stimulus

A stimulus that naturally triggers a response without the need for prior learning.

Conditioned Stimulus

A previously neutral stimulus that, after being associated with an unconditioned stimulus, comes to elicit a conditioned response.

Unconditioned Response

An automatic, natural reaction to a stimulus that occurs without previous conditioning or learning.