6 doctors weighed in:

What causes muscle weakness in polio?

6 doctors weighed in
Dr. Jay Rosenfeld
Physical & Rehabilitation Medicine
2 doctors agree

In brief: 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.

In brief: 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.
Dr. Jay Rosenfeld
Dr. Jay Rosenfeld
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1 comment
Dr. Ricardo Madrid
the polio virus attacks and kills motor neurons of the spinal cord and brainstem with resulting flaccid paralysis of the muscles innervated by those neurons via the motor nerves
Dr. William Singer
Pediatrics - Neurology
1 doctor agrees

In brief: 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.

In brief: 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.
Dr. William Singer
Dr. William Singer
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