If a Person Suffered Injury to the Right Motor Cortex

Multiple Choice

If a person suffered injury to the right motor cortex that resulted in paralysis of the left arm and later showed some evidence of recovery of function, which of the following would be a likely explanation?

A) Using the right arm more strengthened the left arm.
B) The left motor cortex strengthened its control over the left arm.
C) New neurons grew in place of the damaged ones.
D) The left arm was deafferented.