Vertical Rectus Muscles The action of the superior rectus is more complex than that of the medial andlateral rectus musclesbecause it lies at an angle to each of the axes; with the insertion above the origin and on the anterior globe, movement around the horizontal axis causes elevation. The...
Lesion of the medial longitudinal fasciculus (MLF), which traverses between the contralateral CN VI nucleus and the ipsilateral CN III subnucleus, serving the medial rectus muscle; results in an ipsilateral deficiency of adduction and contralateral abducting nystagmus; convergence can be absent (mesencep...
Conjugate eye movements require coordination of the three cranial nerves and their muscles. The pathway responsible for this coordination is the medial longitudinal fasciculus (MLF), which runs in the center of the brainstem and conveys afferent information from the vestibular nuclei to the nucle...