Muscle weakness, or myasthenia, is a decrease in strength in one or more muscles. It is a common symptom of muscular, neurological and metabolic disorders. Muscular diseases, such as muscular dystrophy and dermatomyositis (disorder characterized by muscle inflammation), are common causes of muscle weakness.
Rating Newest Oldest. Best Answer: A doctor has a degree from medical school (4 years, either an MD or a DO) and has gone through residency (anywhere from 3 to 10 additional years of training). They are licensed to practice medicine or surgery (or both) independently, write prescriptions, etc.
Nurse Practitioner vs. Physician Assistant. Diffen âº Professions âº Medical Professions. A nurse practitioner, or NP, is a registered nurse who is trained to provide various health care services and, depending on state regulations, may be able to see patients and practice medicine in the same way that a doctor of medicine (MD) can.