Bilateral Innervations to Superior Oblique by Trochlear Nucleus in cats: Retrograde Tracer Study by Horseradish Peroxidase

ABSTRACT

Trochlear motorneurons were identified by applying horseradish peroxidase(HRP) to superior oblique muscle in cats. Ninety five to ninety seven percent of the contralateral trochlear nucleus were stained 3-5% of ipsilateral side also labelled by HRP. These findings showed that superior oblique muscle was innervated by trochlear nuclei on both side.