Possible Clues:

• It turns in either direction
• Palindromic cuff type
• Muscle with a palindromic name
• What can go round, one way and another
• Spinning device that's no different in reverse
• What goes around, comes around, either way
• Muscle seen from both sides
• Palindromic antenna turner
• Twisted muscle still the same
• 14 (part 2) on tip of tendon or muscle