11. Warm and cold sensitive nerve fibers differ in structure and function. 12. This is a cholinergic bundle of nerve fibers posterior to the anterior perforated substance. 13. Muscle nerve fibers contain specialized cells that actually stimulate rather than inhibit axonal growth. 14. That motion can tear nerve fibers and cause permanent damage. 15. For example, fundus photography can monitor nerve fiber layer swelling. 16. Visceral afferent fibers go to spinal cord following pathway of pelvic splanchnic nerve fibers . 17. However, the myelin layer does not ensure a perfect regeneration of the nerve fiber . 18. Some studies have revealed that optic nerve fibers can be regenerated in postnatal rats. 19. One of the substances, called Tau, produces tangles of nerve fibers around the brain. 20. Some researchers speculate that the lasers destroyed the nerve fibers that transmit the pain.