Aberrant innervational pattern in Duane's syndrome type II without globe retraction

Using extraocular muscle electromyography we studied a patient with an adduction defect and face turn. The patient was found to have an anomalous firing pattern in the medial and lateral rectus muscles consistent with Duane's syndrome type II but globe retraction was absent. On the basis of this finding we concluded that mechanical factors appear to play a significant role in the globe retraction seen in Duane's syndrome.