Third nerve palsy

Third Nerve Palsy

Welcome to the Third nerve palsy subsection of the Neurology for the MSRA course.

This section is designed to provide comprehensive and structured learning materials to help you understand and master the topic of Third nerve palsy for the MSRA. It covers key aspects of this cranial nerve disorder, based on UK NICE guidelines.

In this subsection, you will find the following resources to aid your revision:

  1. Third Nerve Palsy Revision Notes for MSRA: Detailed and concise revision notes covering all essential aspects of third nerve palsy, including its causes, symptoms, diagnosis, and treatment. These notes are structured using UK NICE guidelines and are presented in a format designed for quick recall.
  2. Third Nerve Palsy Flashcards for MSRA: Interactive flashcards designed to help you memorise key facts and concepts about third nerve palsy. These are ideal for quick reviews and reinforcing knowledge.
  3. Third Nerve Palsy Accordion Q&A Notes for the MSRA: Test your understanding with question-and-answer-style accordion notes. This active learning format supports retention and allows you to focus on weaker areas.
  4. Third Nerve Palsy Rapid Fire Quiz for MSRA: A short quiz to assess your knowledge of third nerve palsy, helping you identify areas that need further review. Additional questions are available in the question banks and mock exams on the website.

Key Points about Third Nerve Palsy:

  1. Definition: Third nerve palsy (oculomotor nerve palsy) refers to dysfunction of the oculomotor nerve, affecting eye movements, eyelid elevation, and pupil constriction.
  2. Causes: Causes include ischemia due to diabetes or hypertension, aneurysms, trauma, tumours, and infections. It can also occur in the context of intracranial pressure increase or brainstem lesions.
  3. Symptoms: Symptoms include ptosis (drooping eyelid), outward deviation of the eye (down and out), and pupil dilation. Diplopia (double vision) is also a common feature.
  4. Diagnosis: Diagnosis is based on clinical examination, with imaging such as MRI or CT to investigate underlying causes, particularly if aneurysm or tumour is suspected. Pupil involvement is a key diagnostic sign.
  5. Management: Management depends on the underlying cause, ranging from medical management for diabetes or hypertension to surgical intervention for aneurysms. Patching or prism glasses may help alleviate diplopia.
  6. Complications: Complications include persistent diplopia, vision loss if associated with an aneurysm, and recurrence in chronic conditions like diabetes.

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Free MSRA Podcast: Third nerve palsy

https://open.spotify.com/episode/3qM5fVYcfW576NmZUoNEMC?si=83Tg0e0yQbSA5L6_wdOKmA