Neuromuscular electrical stimulation: generate muscle contractions for ppl who"ve lost voluntary muscle control, external electrical current applied to skin, produce muscle contraction, stimulates many motor neurons simultaneously to contract many motor units. Pros: non-invasive, easy to use, health benefits similar to benefits of exercise, use it or lose it principle, maintain muscle quality. Cons: not everyone can use (ppl with injuries below t12-l1 can"t use, nerve branches/motor neuron cell body will die off, lack of recruitment specificity, high energy, shave surfaces. Cerebral palsy (cerebral of the brain", palsy lack of muscle control") Cerebral palsy: chronic(lifelong) neurological disorder of movement and posture caused by lesion in immature brain (early pregnancy up to 3 years old: non-progressive, severities can range, 2-2. 5/1000 births. Prenatal: (70-80% of cp: abnormal placenta, malformations of brain, toxemia (high blood pressure, stroke, infections, exposure to chemical toxins, low birth weight, prematurity, twins/multiple births. Perinatal: (during birth, 5-10%: cord prolapse, intracranial hemorrhage, premature separation of placenta or severe bleeding.