https://stream.echo6.co/videos/watch/3a041298-27bb-4554-ae8f-7c3c44615aed Official Ninja Nerd Website: https://ninjanerd.org Ninja Nerds! In this lecture, Professor Zach Murphy presents part 4 of our neuromuscular junction series, focusing on key pathologies that can impair neuromuscular transmission. We start with an overview of standard synaptic signaling, including acetylcholine release, receptor activation at the motor end plate, and subsequent excitation-contraction coupling. With this foundation, we explore how specific disorders disrupt these steps and lead to characteristic clinical presentations. We discuss autoimmune conditions such as myasthenia gravis, where antibodies target postsynaptic acetylcholine receptors, and Lambert-Eaton myasthenic syndrome, in which antibodies impair presynaptic voltage-gated calcium channels. We also cover the mechanisms of botulism toxin, which blocks acetylcholine release, and tetanus toxin, which inhibits inhibitory neurotransmitter release in the central nervous system. Additional conditions, such as organophosphate poisoning and certain pharmacologic agents, are explained to show how they alter synaptic function, leading to weakness, paralysis, or sustained muscle contraction. Finally, we connect these pathologies to their real-world implications by reviewing hallmark symptoms, diagnostic approaches, and the underlying pathophysiologic differences that help distinguish one condition from another. 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 https://www.tiktok.com/@ninjanerdlectures https://www.instagram.com/ninjanerdlectures https://www.facebook.com/ninjanerdlectures https://x.com/ninjanerdsci/ https://www.linkedin.com/company/ninja-nerd/ 💬 Join Our Community Discord: https://discord.gg/3srTG4dngW #ninjanerd #NMJ #Musculoskeletal Wed, 15 Apr 2026 11:44:51 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/3a041298-27bb-4554-ae8f-7c3c44615aed All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.