11. It is a rudiment of the extensor muscle of the caudal vertebrae of other animals. 12. The second, third and fourth metatarsals have deep grooves for the tendons of the extensor muscles . 13. These extensor muscles are supplied by the posterior interosseous nerve, a branch of the radial nerve. 14. These antigravity muscles are extensor muscles in the legs that help maintain upright and balanced posture. 15. It provides motor function through innervation to most extensor muscles of the posterior arm and forearm. 16. Wheelchair propulsion is achieved with a pulling action using the elbow flexor and wrist extensor muscles ". 17. Unlike most arthropods, spiders have no extensor muscles in their limbs and instead extend them by hydraulic pressure. 18. The focus on gripping muscles versus wrist extensor muscles can be varied based upon the thickness of the bar. 19. At that location, the interneuron excites the alpha motor neurons that innervate the extensor muscles of the opposite leg. 20. This decreases the rate of muscle shortening and increases the force generated by extensor muscles during the push off phase.
