system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Power grip of hand is due to
assistant
The correct answer is  In power grip, the extrinsic muscles provide the major force, the interossei are used as flexors and rotators at the metacarpophalangeal joints, and the thenar muscles are generally active