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Facial Motor Nucleus
The FACIAL MOTOR NUCLEUS is a collection of neurons in the brainstem that belong to the facial nerve (cranial nerve VII). These lower motor neurons innervate the muscles of facial expression and the stapedius . CONTENTS * 1 Structure * 2 Function * 2.1 Cortical input * 3 Clinical significance * 3.1 Mechanism of Facial Nerve Upper vs Lower Motor Neuron Lesions * 4 Additional images * 5 References STRUCTUREThe nucleus is situated in the caudal portion of the ventrolateral pontine tegmentum . Its axons take an unusual course, traveling dorsally and looping around the abducens nucleus , then traveling ventrally to exit the ventral pons medial to the spinal trigeminal nucleus . These axons form the motor component of the facial nerve , with parasympathetic and sensory components forming the intermediate nerve
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