muscle power testing is frequent and important part of nweurological examination. Here are the grades of muscle power as examined clinically
Grade 0- complete paralysis
Grade 1 -flicker of contraction present
Grade 2- active movement with gravity eliminated
Grade 3-Active movement against gravity
Grade 4-Active movement against gravity and some resistance described as poor, fair, moderate strength.
Grade 5- Normal power.
[...] below neurologic level and more than half of the key muscle groups below neurologic level have a muscle grade less than [...]