What scale is used to grade shoulder strength in the examined material?

• A. 0-5 scale
• B. 0-10 scale
• C. 1-5 scale
• D. 0-4 scale

Answer: (A)

Muscle strength grading in clinical exams uses the Medical Research Council scale, which runs from 0 to 5. This scheme captures the full range of shoulder strength: 0 is no contraction; 1 is a visible or palpable contraction with no movement; 2 is movement when gravity is eliminated; 3 is movement against gravity but not against resistance; 4 is movement against some resistance; and 5 is normal strength against full resistance. For the shoulder, you assess key movements (like abduction, external rotation, and flexion) with appropriate resistance to place each muscle group on this scale. This standard 0–5 system is the one typically described in examined materials, making it the best choice. Other scales either omit a full-strength category or use a different grading approach that isn’t as consistently utilized in such materials.