ЧН 6: Отводящий нерв (Схема, Путь, Клиническое значение) | Нейроанатомия скачать в хорошем качестве

ЧН 6: Отводящий нерв (Схема, Путь, Клиническое значение) | Нейроанатомия

Content: 0:00 Introduction 00:41 Abducens Nerve Scheme 01:53 Abducens Nerve Nucleus 04:05 Abducens Nerve Course 05:04 Lateral Rectus Muscle Function 06:25 Clinical Relevance 07:06 Recap ------------------------------- 🫀 Join:    / @taimtalksmed   📷 Follow my IG:   / taimtalksmed   💝 Donation link: https://www.buymeacoffee.com/taimtalk... ------------------------------- Abducens nerve is purely a motor nerve supplying the lateral rectus muscle involved in abduction of the eye Abducens/abducent nerve Nucleus: Nucleus of abducens nerve (nucleus nervi abducentis) ○ Facial nerve goes around this nucleus forming the facial colliculus (colliculus facialis) ○ A somatomotor nucleus that is located in the pons innervates the lateral rectus Course: Emerges from the medullopontine sulcus between the pons and medulla oblongata Leaves the brainstem on the ventral side Runs on the base of the skull, penetrates the dura mater then enter the cavernous sinus Enters the orbit via the superior orbital fissure and common tendinous ring Then innervates the lateral rectus Function of lateral rectus muscle: Abduction of the eye Hering's Law of equal innervation: Coordinates both eyes together, so that the medial and the lateral rectus muscle contracts equally, while deactivating the contralateral muscle through the medial longitudinal fasciculus. Clinical Relevance: Abducens nerve can get compressed by a lesion or rise in intracranial pressure. Compression causes paralysis of lateral rectus muscle, resulting in medial deviation of affected eye, giving a fully adducted eye at rest and an inability to abduct the eye. Sources: Singh, I. (2017). Human neuroanatomy (10th ed.). Helwany M, Bordoni B. Neuroanatomy, Cranial Nerve 1 (Olfactory) [Updated 2022 Aug 8]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan- Kozlowski, T. (2017). Memorix Anatomy: The Complete Study Guide. 2nd ed. Thieme Medical Publishers. Pictures and visuals: Complete Anatomy Biorender Powerpoint Camtasia 2021