Anatomy of the Chin and Collar Bones

Chin

For my wound it will be placed under the chin just behind the mentalis muscle. Which means that this  end of the fork would not damage anything important if it were to move side to side so nothing to go wrong with my character in that way. However if the fork were to move up quite a bit it could damage the mandibular nerve which would be painful, this is highly unlikely as the forks prongs aren't that long and also are trapped to a piece of leather, the only way this nerve could be damaged is if my characters head jams forward.   

Where the fork will be placed it is in between the lower jaw line, this bone forms the lower part of the skull, the movement of the lower the jaw opens and closes the mouth and allows to chew the food. The bottom set of teeth are also rooted in the jaw bone. Within this area there are four different muscles, these muscles are the master, the temporals, the medial pterygoid and the lateral pterygoid. These muscles are in pairs with one of each muscle on both sides of the skull. These muscles work in combination to pivot the lower jaw up and down and allow the jaw to move side to side.  If my character were to move around and the fork happens to slip or move and hitting the jaw bone depending on how much and how hard to move and impales the skin, if the jaw bone gets fractured they can be minor or severe, if there were to be more severe fractures if she survives then her jaw would have to be wired shut to prevent movement during the healing process.

Collar Bones

This part of the body is located between the clavicle ( collar bones), it is known as the jugular notch. this part of the body is quite fleshy so the wound should harm anything if my character does not move about much making the fork become loose and move if this happens and moves either side it will hit the collar bones and can be quite painful. If the fork is to move into the skin further it could go into the jugular notch which is the bone at the top of the sternum.

Image 1: Available at http://www.allicanbe.com.au/wp-content/uploads/2012/07/Cosmetic-image.jpg [15th October 2015]

Image 2: Available at https://web.duke.edu/anatomy/Lab02/Lab2Exercise1.jpg [15th October 2015]

Internet: (5th February 2015)  http://www.healthline.com/human-body-maps/mandible  [15th October 2015]