Pronation and supination of hand

Pronation of hand 

Supination of hand

1. Palm facing down

1. Palm facing up

2. Both radius and ulna bone

doesn't present parallel

2. Both radius and ulna bone

present parallel 

3. Inward rolling of hand 

3. Outward rolling of hand

4. Muscle involve -

Pronator teres & quadratus

4. Muscle involve - Supinator