Complex sentence: Botulinum toxin is used to treat a number of disorders characterized by overactive muscle movement, including spasms of the head and neck, eyelid, vagina, limbs, jaw, and vocal cords.
Split into simpler sentences: Botulinum toxin is used to treat a number of problems. As such, botulinum toxin is used to treat a number of disorders characterized by overactive muscle movement, including spasms of the head and neck, eyelid, vagina, limbs, jaw, and vocal cords.