Novel hydroxymethylbilane synthase gene mutation identified and confirmed in a woman with acute intermittent porphyria: A case report

Table 1 Medical research council scale for muscle strength

Function of the muscle	Grade
No movement is observed	0
Only a trace or flicker of movement is seen or felt in the muscle or fasciculations are observed in the muscle	1
Muscle can move only if the resistance of gravity is removed	2
Muscle strength is further reduced such that the joint can be moved only against gravity with the examiner’s resistance completely removed	3
Muscle strength is reduced but muscle contraction can still move joint against resistance	4
Muscle contracts normally against full resistance	5