ASSOCIATED PARALYSES OF THE PARALLEL MOVEMENTS
The disorders of the movements of the eyes caused by lesions of peripheral origin, i. e., of the nuclei and of the individual motor nerves, have been discussed previously.1 If a lesion is situated above the nuclei, injuring the supranuclear apparatus, i. e., the pathways between the nuclei and the cortical, the subcortical or the vestibular centers, paralysis of the associated muscle groups of both eyes occurs as a rule. The few exceptions to this rule are the paralyses caused by a lesion of the posterior longitudinal bundle or in the immediate neighborhood of the nuclei of the oculomotor nerves. Such a lesion can deprive one internal rectus muscle of the faculty of adduction in lateral movements, leaving intact its convergence function, or it can make both elevator muscles of one eye unable to produce a voluntary elevation without disturbing the involuntary elevation
BIELSCHOWSKY A. LECTURES ON MOTOR ANOMALIES OF THE EYES: III. PARALYSES OF THE CONJUGATE MOVEMENTS OF THE EYES. Arch Ophthalmol. 1935;13(4):569–583. doi:10.1001/archopht.1935.00840040057003
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