Facial Muscles In The Head

The bacteria Clostridium tetani affect the muscles nearest to the infected wound. They then spread to other muscles, such as;
Chewing muscles (sometimes known as "lockjaw") Making it very hard to open the mouth.
Throat muscles - Making it difficult to swallow.
Facial muscles - Making it look like someone is grinning.
Neck muscles- Making the head tilt.
Chest muscles - Making breathing difficult.
Back muscles - Arching the spine.
Abdominal (tummy) muscles.
Muscles in the arms.
Muscles in the legs.