The upper motor neuron lesion in the brain in turn impairs the ability of some nerve receptors in the spine to properly receive gamma amino butyric acid, leading to hypertonia in the muscles signaled by those damaged nerves.
The upper motor neuron lesion in the brain in turn impairs the ability of some nerve receptors in the spine to properly receive gamma amino butyric acid. The upper motor neuron lesion in the brain in turn was leading to hypertonia in the muscles. These muscles were signaled by those damaged nerves.