Logan has no use of his legs but has good control of his trunk and abdominal muscles. That indicates injury at or below the ninth thoracic vertebrae, meaning between the lower chest and the small of the back . Doc says the bullet fragment could migrate, making Logan quadrapalegic; that would require injury at the level of cervical vertebrae, in the neck. No fragment can migrate from lower back up into the neck.
"I'm making tea; what's your preference?" "Belladonna, mandrake, anything in the opium family." Belladonna and mandrake, noted for containing atropine, are in the Solanaceae family, which includes jimsonweed, potatoes, tomatoes, tobacco, and chili peppers. The opium family is Papaveraceae.