What causes muscle weakness in polio?

See below. The polio virus attacks the nerves in the spinal cord that supply the muscles. Called motor nerves. Polio does not affect the nerves that deal with sensation. When the nerves die due to the polio virus, the muscles tend to wither and that is what causes the weakness. Post polio syndrome can occur 30-40 years later with new symptoms of weakness and fatigue. It is not a reactivation of the virus.
Affects spinal cord. Polio affects the motor nerve cells in the spinal cord. When these nerve cells die, that reduces the messages that can be sent to muscles.

Related Questions

What causes facial muscle weakness?

Facial palsy. Bell's palsy which is the injury of facial nerve that innervates the facial muscles can cause facial assymetry. You need to check with your doctor for treatment. Read more...
Facial weakness. Facial weakness can come from problems with the muscles themselves or from the nerves (or brain) that innervates them. Conditions such as bell's palsy, tumors, or strokes can cause facial weakness. Read more...
Facial muscle weakne. Common causes are trauma to the facial nerve, bell's palsy, muscular diseases and stroke are some causes. Read more...

What nerve causes facial muscle weakness?

Cranial Nerves. Facial expression and movement are controlled by several of the cranial nerves (cn). Ocular motion by cn3, 4, 6. Eyebrow lift by cn3, eyelid closing by cn7, muscles of chewing by cn5 and the rest of the face by cn7. Read more...

What causes muscle weakness and sleepiness?

Narcolepsy? Some patients have narcolepsy and cataplexy. It is characterized by sudden and transient episodes of bilateral loss of muscle tone without loss of consciousness often triggered by an emotional stimulus such as laughter, surprise, anger, fear or humorous situations. Other reasons are sleep paralysis (weakness on awakening), what could be normal. Read more...
Diet and exercise. Many things can cause it ... But if you have a well balanced diet and regular exercise, muscles are stronger and sleep is better. Read more...

How likely will west nile virus cause severe muscle weakness?

Unlikely. A very small minority of patients who develop west nile infection are left with widespread muscle weakness that is much like poliomyelitis. Read more...
Depends. Muscle weakness is usually seen proportional to the coalescence of the illness. Your recovery with take twice as long as the illness, unless there was neurological injury of a permanent type, which may take longer. A rehabilitation physician can help you with recovery. Read more...

Is there a disease that causes muscle weakness and weight loss?

Yes. Generalized muscle weakness is a sign of a significant illness (auto-immune or thyroid diseases are possibilities). Unintentional weight loss is another sign of a significant problem (cancer, thyroid problems, psychological issues, or auto-immune diseases are possibilities). A person with both symptoms should be at the doctor's office getting a full evaluation. Read more...
Yes. Systemic illness, toxicity, congenital illness to name a few can cause muscle weakness and weight loss. Read more...

Can being bit by a tarantula cause muscle weakness or nerve pain?

Not in the US... The tarantulas in the United States are not known to have a neurotoxic venom. If you get bitten by a spider try to take it with you to the er in a clear container. Read more...
Depends of type. of tarantula. Many species of tarantulas are not harmful to humans. If a tarantula bites it might be a “dry” bite – injecting little to no venom. However, the bite of some tarantulas can cause pain & swelling at the site, muscle cramping, fever, difficulty breathing and exhaustion. The Chinese Bird Spider (a type of tarantula) has been blamed for one death in China. Read more...