Protriptylin ( Vivactil 1  ) Chemical Name: Protriptyline HCIBrand Name: Vivactil Manufacturer: Merck and CompanyDescription: Anti-depressant of unknown mechanism. Indication and Use: Vivactil is indicated for the treatment of depression in patients who are under close medical supervision.
The optic nerve (also known as cranial nerve II) is a continuation of the axons of the ganglion cells in the retina. There are approximately 1.1 million nerve cells in each optic nerve. The optic nerve, which acts like a cable connecting the eye with the brain, actually is more like brain tissue than it is nerve tissue. visual pathway
The optic nerve is a cable of nerve fibers that carry electrical impulses, containing visual information, from the eye to the brain.cientists around the world are working hard to find a way to regrow the optic nerve. In addition, because of its easy access, the optic nerve has long served as a standard model for the study of spinal cord injury and regeneration in lab animals.