New England College of Optometry - Scope Yearbook (Boston, MA)

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THE SCOPE Relatively little is known about the oculogyratory control in the occipital lobe. and practically nothing about the center in the temporal lobe. The cortico- nuclear tracts from the occipital lobe pass through the corona radiata over the occipital radiation to the white substance of the cerebrum, and thence to the ocu- logyric center by way of the posterior longitudinal bundle of the tecto-bulbar tracts, which innervate the abducens nucleus, which in turn innervates the op- posite oculomotor nucleus. Bernheimer in a famous experiment has shown that the iibers of the angular gyrus decussate ventral to the cerebral aqueduct, since total extirpation of the superior colliculi did not interfere with ocular move- ments. These nbers after decussation pass to the opposite abducens nucleus, which in turn by means of the posterior longitudinal bundle and communicating fibers innervates the dpposite oculomotorius. Fibers from the temporal cortex are believed to pass down with the tem- poro-pontine group which pass through the corona radiata, thence to the su- perior colliculus, and onward to the oculogyratory nuclei. Some however, are of the opinion that the fibers from the temporal lobe pass to the pons communi- cating with the abducens nucleus of the opposite side, which sends fibers by way of the posterior longitudinal bundle to the opposite oculomotor nuclei. REFERENCES Tilney and Riley Forms and Functions of the Nervous System Archives of Neurology and Psychiatry, 1930 Archives of Ophthalmology, Nov. and Dec. 1930 Archives of Ophthalmology, 1932 Ranson Anatomy of the Nervous System Zoethout Physiological Optics ff? P57 - ff'2tPEGh5Qzi05!.IS3' -wwrrgimw I 7696 'Eli-EQ' I5I

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