Yes because caffeine causes a chemical reaction <span />
The corticospinal tract carries motor signals from the primary motor cortex in the brain, down the spinal cord, to the muscles of the trunk and limbs. And The corticobulbar tract carries efferent, motor, information from the primary motor cortex to the muscles of the face, head and neck.
Yes, you can even get caffeine poisoning, Good Luck
Well because you weight is different form every thing else that goes on in your body.
