- Among the various parts that are affected by this toxin, the muscles in the jaw are held so tightly that the person is not able to even move his jaw muscles. Hence, this Condition is also called as Lockjaw. | - Among the various parts that are affected by this toxin, the muscles in the jaw are held so tightly that the person is not able to even move his jaw muscles. Hence, this Condition is also called as Lockjaw. |