04. Weakness and lethargy
The motor cortex of the brain initiates and controls muscle movement throughout the body. “The right motor cortex controls the left side of your body and the left motor cortex controls the right side of your body,” says Dr. Chen. If there are tumors anywhere along this pathway, these signals are completely disrupted and the result is loss of function.” If you have a brain tumor, you may not experience pain in your limbs, but your left or right leg or arm may not respond the way you’re used to—or at all.