Fal-tor-voh was a treatment for a Vulcan neurodegenerative disease, involving a mind meld. The disease caused the neuropeptide levels in the brain to decrease, and affected the logic capabilities. The treatment could only be performed by a Vulcan who was compatible with the patient, which usually meant a blood relative. In 2378, Tuvok required fal-tor-voh as he began showing symptoms of the disease. However, the only other Vulcan on USS Voyager, Vorik, was not compatible, and thus Tuvok required a relative in the Alpha Quadrant.