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Faculty of Medicine and Health Sciences > Clinical Skills Centre > Clinical Skills Resources

Peripheral Nervous System Examination

Assessment of Power of the Upper and Lower Limbs

Comparing patient's power to own strength.

Remember "normal" power may vary depending on the patient which is why it is very important to always compare sides.

Think about the size and strength of the muscles you are testing.

Upper Limb

Lower Limb

Method for Describing Muscle Power

Table showing the grade and description of muscle power
4 Weak, but can overcome gravity and some resistance
3Very weak, but can overcome gravity
2Able to move the limb only if supported against gravity
1A flicker or trace of contraction