OTOSCLEROSIS INTERESTING FACTS скачать в хорошем качестве

OTOSCLEROSIS INTERESTING FACTS

Why the Facial Canal is Not Involved in Otosclerosis Introduction: • “Otosclerosis is a bone remodeling disease affecting the otic capsule, particularly the stapes footplate and oval window.” • “Despite the facial nerve canal being very close to the oval window, it is usually not affected by otosclerosis. Let’s explore why.” 1. Embryology & Histology • “The facial nerve canal develops from endochondral bone, while the otic capsule has a unique remodeling pattern.” • “The otic capsule is the only part of the human skeleton that does not remodel after birth, except in otosclerosis.” 2. Sites of Otosclerosis • “Otosclerosis primarily affects the fissula ante fenestram, cochlear capsule, and round window niche.” • “The facial nerve canal is not a site of active bone remodeling, making it resistant.” 3. Protective Structures • “The perineural connective tissue and vascular structures in the facial canal offer protection.” • “The facial nerve’s blood supply differs from that of the otic capsule.” 4. Compact Bone of the Facial Canal • “The bony covering of the facial canal is thicker and denser than the oval window region.” • “Otosclerosis mainly affects the vascular spongy bone, not dense bone.” 5. Histopathological Evidence • “A study by Nomiya et al. found no significant difference in facial nerve dehiscence between otosclerosis cases and controls.” • “The otosclerotic focus did not invade the facial canal or cause nerve damage.” • “Interestingly, it was suggested that otosclerosis might even close pre-existing facial nerve dehiscences.” 6. Rare Cases of Facial Nerve Involvement • “In some patients, if the facial canal is dehiscent, otosclerosis may cause nerve compression, leading to facial nerve palsy.” • “Cochlear otosclerosis or surgical trauma during stapedotomy can also rarely affect the nerve.” Conclusion: • “Due to differences in embryology, bone structure, metabolic activity, and protective factors, otosclerosis rarely involves the facial nerve canal.” • “Facial nerve complications occur only in exceptional cases.” Outro: • “Thank you for watching! If you found this useful, don’t forget to like, share, and subscribe for more ENT-related content.” #science #ear #biology #ent #nose #anatomy #otolaryngology #tonsils #nosebleed #throathealth