idk if it’s exactly 3 grams of fat. but low fat mean when your diet is mostly less in fat or saturated fat.
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.
Movement it helps the heart contract to beat.