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Official Ninja Nerd Website: https://ninjanerd.org Ninja Nerds! Join us in this lecture where Professor Zach Murphy will be discussing the anatomy and function of the vagus nerve, cranial nerve X. We begin by outlining its extensive range of functions as a mixed nerve carrying sensory, motor, and parasympathetic fibers. The lecture traces its origin from the medulla oblongata, its exit through the jugular foramen, and its wide distribution throughout the thorax and abdomen. We review its somatic motor innervation of most pharyngeal and laryngeal muscles via the nucleus ambiguus and its role in speech, swallowing, and maintaining an open airway. We then discuss its visceral sensory fibers, which provide input from thoracic and abdominal organs, and its somatic sensory contributions from the external ear, external auditory canal, and part of the pharynx. The parasympathetic component of the vagus nerve is covered in detail, highlighting its regulation of heart rate, gastrointestinal motility, and glandular secretions via the dorsal motor nucleus of the vagus. We also explore its involvement in reflex arcs such as the gag reflex, cough reflex, and baroreceptor-mediated blood pressure control. Finally, we connect the anatomy to its functional importance, emphasizing how the vagus nerve integrates motor, sensory, and autonomic systems to maintain homeostasis. Its widespread influence across multiple organ systems underscores its critical role in daily physiological regulation. Enjoy the lecture and support us below! 🌐 Official Links Website: https://www.ninjanerd.org Podcast: https://podcast.ninjanerd.org Store: https://merch.ninjanerd.org 📱 Social Media / ninjanerdlectures / ninjanerdlectures / ninjanerdlectures https://x.com/ninjanerdsci/ / ninja-nerd 💬 Join Our Community Discord: / discord #ninjanerd #VagusNerve #CranialNerves