Using Single-Cell Recording, a Researcher Isolates a Neuron in the Motor

Multiple Choice

Using single-cell recording, a researcher isolates a neuron in the motor cortex of a monkey that is extremely active when the monkey moves its arm from left to right. In subsequent trials, the animal is required to move its arm from the starting to the ending locations diagrammed here. Which, if any, of these additional trials will also increase activity in this neuron?

A) C only
B) A and B
C) A, B, and D
D) D only