This site is intended for healthcare professionals
Login | Register (NOW FREE)

Medical search

IIIrd nerve palsy

FREE subscriptions for doctors and students... click here
You have 3 open access pages.

Paralysis of the third cranial nerve affects the medial, superior, and inferior recti, and inferior oblique muscles.

The eye is incapable of movement upwards, downwards or inwards, and at rest the eye looks laterally and downwards owing to the overriding influence of the lateral rectus and superior oblique muscles respectively. The reduced response of levator palpebrae superioris results in ptosis - a drooping of the upper eyelid.

A third nerve palsy with pupillary sparing is often termed a medical third palsy and often has an ischaemic or diabetic aetiology.

Full assessment of oculomotor nerve function involves testing of movement, reaction to light, and accommodation. If all of these are normal, "PERLA" may be written in the notes - pupils equal, reactive to light and normal accommodation.

Links:

The information provided herein should not be used for diagnosis or treatment of any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions. Copyright 2016 Oxbridge Solutions LtdĀ®. Any distribution or duplication of the information contained herein is strictly prohibited. Oxbridge Solutions LtdĀ® receives funding from advertising but maintains editorial independence. GPnotebook stores small data files on your computer called cookies so that we can recognise you and provide you with the best service. If you do not want to receive cookies please do not use GPnotebook.