Increases in cortical thickness in the hand area of the primary motor cortex are associated with:
A) increases in hand size.
B) increases in grip strength.
C) increases in manual dexterity.
D) increase in tendon brittleness.

Question

Quizplus · Accepted Answer

Increases in cortical thickness in the hand area of the primary motor cortex are associated with increases in manual dexterity. This is because the primary motor cortex is involved in the planning and execution of movement, and greater cortical thickness in the hand area may reflect greater motor control and precision in hand movements. Increases in hand size or grip strength would not necessarily lead to changes in cortical thickness in the primary motor cortex, and there is no known relationship between tendon brittleness and cortical thickness.

Increases in Cortical Thickness in the Hand Area of the Primary