What is muscle weakness?

Dr. Jeanne Morrison, PhD
Family Practitioner

Muscle weakness is a medical term that means your voluntary muscles cannot contract normally even when you exert a full effort. Muscle contraction requires that the spinal cord and the nerves receive a signal from the brain. If the nervous system, the muscles, or the area between the two are diseased or damaged, you can have muscle weakness. Muscle weakness is not just feeling tired or weak, it is a neuromuscular disorder.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.