Various nomenclatures for the segments of the CNs are described in the anatomical, surgical, and radiological literature [5,14,15]. In approaching cranial neuropathy, several concepts should be emphasized: 1. Cranial neuropathy can result from pathology affecting the nerve fibers at any point from the CN nucleus to the end organ supplied by the nerve. Pathologic processes affecting the brain, CN nuclei, or nerve fiber tracts supplying CNs are often associated with multiple neurologic symptoms. The CNs may take long, circuitous routes to their end organs. A detailed knowledge of CN anatomy coupled with a careful neurologic examination is essential for proper clinical localization of potential lesions and for the selection of appropriate imaging protocols. aMayo Clinic Arizona, Phoenix, Arizona. bPanel Chair, University of Iowa Hospitals and Clinics, Iowa City, Iowa. cPanel Vice-Chair, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts. dFroedtert Memorial Lutheran Hospital Medical College of Wisconsin, Milwaukee, Wisconsin. eStritch School of Medicine Loyola University Chicago, Maywood, Illinois. fMontefiore Medical Center, Bronx, New York. gNorthwestern University Feinberg School of Medicine, Chicago, Illinois; American Academy of Otolaryngology-Head and Neck Surgery. hRush University Medical Center, Chicago, Illinois; Neurosurgery expert. iHouston Methodist Hospital, Houston, Texas. jUniversity of Texas Health Science Center, Houston, Texas. kThe University of Texas MD Anderson Cancer Center, Houston, Texas. lNew York University Langone Medical Center, New York, New York. mMayo Clinic, Rochester, Minnesota. nMetroHealth Medical Center, Cleveland, Ohio. oUniversity of North Carolina School of Medicine, Chapel Hill, North Carolina; American Academy of Neurology. pNorthwestern University Feinberg School of Medicine, Chicago, Illinois; Neurosurgery expert. qGeorge Washington University Hospital, Washington, District of Columbia.
Cranial Neuropathy. Various nomenclatures for the segments of the CNs are described in the anatomical, surgical, and radiological literature [5,14,15]. In approaching cranial neuropathy, several concepts should be emphasized: 1. Cranial neuropathy can result from pathology affecting the nerve fibers at any point from the CN nucleus to the end organ supplied by the nerve. Pathologic processes affecting the brain, CN nuclei, or nerve fiber tracts supplying CNs are often associated with multiple neurologic symptoms. The CNs may take long, circuitous routes to their end organs. A detailed knowledge of CN anatomy coupled with a careful neurologic examination is essential for proper clinical localization of potential lesions and for the selection of appropriate imaging protocols. aMayo Clinic Arizona, Phoenix, Arizona. bPanel Chair, University of Iowa Hospitals and Clinics, Iowa City, Iowa. cPanel Vice-Chair, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts. dFroedtert Memorial Lutheran Hospital Medical College of Wisconsin, Milwaukee, Wisconsin. eStritch School of Medicine Loyola University Chicago, Maywood, Illinois. fMontefiore Medical Center, Bronx, New York. gNorthwestern University Feinberg School of Medicine, Chicago, Illinois; American Academy of Otolaryngology-Head and Neck Surgery. hRush University Medical Center, Chicago, Illinois; Neurosurgery expert. iHouston Methodist Hospital, Houston, Texas. jUniversity of Texas Health Science Center, Houston, Texas. kThe University of Texas MD Anderson Cancer Center, Houston, Texas. lNew York University Langone Medical Center, New York, New York. mMayo Clinic, Rochester, Minnesota. nMetroHealth Medical Center, Cleveland, Ohio. oUniversity of North Carolina School of Medicine, Chapel Hill, North Carolina; American Academy of Neurology. pNorthwestern University Feinberg School of Medicine, Chicago, Illinois; Neurosurgery expert. qGeorge Washington University Hospital, Washington, District of Columbia.