Page 379 - Clinical Anatomy
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ECA6  7/18/06  6:54 PM  Page 364






                 364  The central nervous system


























                                                                              Fig. 253◊CT scan cut
                                                                              through the level of the
                                                                              third ventricle.


















                                                                              Fig. 254◊MRI sagittal
                                                                              section of the head. Note
                                                                              the fine details of brain
                                                                              structure which can be
                                                                              visualized by this
                                                                              technique.




                The cranial nerves


                The olfactory nerve (I)

                The fibres of the olfactory nerve, unlike other afferent fibres, are unique in
                being the central processes of the olfactory cells and not the peripheral
                processes of a central group of ganglion cells.
                   The central processes of the olfactory receptors pass upwards from the
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