Question

From ipsilateral CN 6 nucleus neurons will do 2 things:

b) information from CN6 nucleus will also project to ______ CN ____ nucleus via the _____ interneurons"

Answer 1

From the CN6 nucleus, neurons project to the contralateral CN3 nucleus via the medial longitudinal fasciculus interneurons, enabling conjugate horizontal eye movements.

Step-by-step explanation:

Information from the CN6 nucleus (abducens nucleus) projects ipsilaterally to the contralateral CN3 (oculomotor) nucleus via the medial longitudinal fasciculus (MLF) interneurons. From the CN6 nucleus, neurons project to the contralateral CN3 nucleus via the medial longitudinal fasciculus interneurons, enabling conjugate horizontal eye movements.

This connection is part of the mechanism that coordinates both eyes to move in the same horizontal direction, a process known as conjugate gaze. When a signal is sent from the primary motor cortex to signal the lateral rectus of one eye to abduct via CN6, the MLF carries a corresponding signal to the contralateral oculomotor nucleus which innervates the medial rectus muscle of the opposite eye, allowing it to adduct, thus achieving coordinated horizontal movement of both eyes.