In December 2004, Mary Lazarro, a 41-year-old mother oftwo, was admitted to Finger Lakes Community Hospital because ofnumbness of the chin and lower lip. Two week prior to admission,she noted a prickling sensation like “pins and needles” at theright corner of her mouth. The sensation extended bilaterally tothe lower lip and to her chin. Neurologic examination revealed onlya superficial hypoesthesia of the chin and lower lip (numb chinsyndrome). There was not clinical evidence of palpable regionallymph nodes or other systemic and neurologic abnormalities. X-raysand a CT scan revealed no abnormalities in the jaw, neck, orpharynx. The numbness and hypoesthesia spontaneously disappearedgradually over a few weeks time. 1) The chapter reviews the organization of thehuman nervous system. From this outline, describe the specific“part” of the nervous system that is affected. 2) Using what you know about the neuroanatomy of this affectedregion, describe what nerve is involved (hint: this is a complexnerve, so be specific regarding the part that is affected) a.ORIGIN : Where does the nerve originate from? b. COURSE: What isthe course of this nerve (what structures does it pass by and/orthrough?) c. FUNCTION: What is the normal function of thisnerve?