February 1970

Alteration of the Orbicularis Oculi Reflex by Pontine LesionsStudy in Multiple Sclerosis

Author Affiliations

Iowa City
From the Neurosensory Center and Department of Neurology, College of Medicine, University of Iowa, Iowa City. Dr. Kimura is now Assistant Professor, Faculty of Medicine (Neurology), University of Manitoba.

Arch Neurol. 1970;22(2):156-161. doi:10.1001/archneur.1970.00480200062006

THE RESPONSE of the orbicularis oculi muscle to a tap over the brow has two separate components: an early ipsilateral reflex and a late bilateral reflex.1 Electrical stimulation of the supraorbital nerve also evokes two separate contractile responses in the orbicularis oculi muscle (Fig 1) which are almost identical to the response to glabellar tap.2,3 The use of electrical stimulation has made it possible to apply this method in the ordinary electromyographic laboratory, and normal values and variations of this reflex have been well established.4,5 In recent years, alteration of the reflex in various diseases of the nervous system has been recognized.2-6

The reflex arc may be affected by lesions of the trigeminal nerve (afferent path), the facial nerve (efferent path), or of the pons (central connections). Practical application of this technique to the study of peripheral facial nerve paralysis5 and of trigeminal nerve

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