Rostral interstitial nucleus of medial longitudinal fasciculus
The rostral interstitial nucleus of medial longitudinal fasciculus (riMLF) is a collection of neurons in the medial longitudinal fasciculus in the midbrain.[3]: 122 It mostly projects efferents to the ipsilateral oculomotor and trochlear nuclei.[2]: 458.e1 To mediate downgaze, it projects efferents to the ipsilateral oculomotor nucleus and trochlear nucleus; mediate upgaze,[2]: 777-778 it projects efferents to the contralateral aforementioned nuclei[3]: 122 [additional citation(s) needed] through the posterior commissure.[2]: 1464.e17 It is situated at the caudal extremity of the mesencephalon[1] at its junction with the telencephalon,[3]: 156 at the level of the superior colliculus.[2]: 778 Lesions of the posterior commissure meanwhile disrupt upgaze.