3rd nerve palsy causes
Third nerve palsy in children and other causes of diplopia, ptosis, and anisocoria are discussed separately. The third cranial nerve supplies the levator muscle of the eyelid and four extraocular muscles: the medial rectus, superior rectus, inferior rectus, and inferior oblique. Recognition of oculomotor nerve palsy is critical to ensure prompt and appropriate evaluation and treatment. A painful pupil-involved oculomotor nerve palsy may result from a life-threatening intracranial aneurysm. See the image below. Patient with left posterior communicating artery aneurysm and third cranial nerve palsy. Any focally destructive lesion along the course of the third cranial nerve can cause oculomotor nerve palsy or dysfunction. A painful pupil-involved oculomotor nerve palsy may result from a life-threatening intracranial aneurysm. Contents. 1  3rd nerve palsy: Causes. 2  3rd nerve palsy: Introduction. 3  3rd nerve palsy: Add a 2nd Symptom.  3rd nerve palsy and Oculomotor palsy (10 1  causes) 3rd nerve palsy and Ocular and facial palsies (8 causes)  3rd nerve palsy and Head symptoms (6 1  causes) 3rd nerve palsy and Body symptoms (6 causes)  3rd nerve palsy and Nerve symptoms (6 causes) The most significant causes of mortality and morbidity along with oculomotor nerve palsy are subarachnoid hemorrhage from berry aneurysm of the posterior communicating artery, and meningitis or meningeal infiltrative disorders, both infectious and neoplastic. 3rd nerve palsy and Oculomotor palsy (10 causes) 3rd nerve palsy and Ocular and facial palsies (8 causes) 3rd nerve palsy and Head symptoms (6 causes) 3rd nerve palsy and Body symptoms (6 causes) 3rd nerve palsy and Nerve symptoms (6 causes) 3rd nerve palsy and Pain (6 causes) 3rd nerve palsy and Sensations (6 causes) 3rd nerve palsy and Sensory symptoms (6 causes) 3rd nerve palsy and Face symptoms (5 causes) Unilateral third cranial nerve palsy. Horizontal deviation is divergent or temporal (exotropia) because of weakness of the medial rectus muscle of the involved side. Vertical deviation results from weakness of the superior rectus, inferior oblique (both elevators), and inferior rectus (depressor) muscles. Fourth cranial nerve palsy is difficult to diagnose in the presence of third cranial nerve palsy because the small increment of depressor deficit (superior oblique muscle) cannot be discerned readily from the depressor palsy that results from weakness of the third nerve innervated depressor (inferior rectus muscle). With unilateral third cranial nerve palsy (ie, oculomotor nerve palsy), the involved eye usually is deviated down and out (ie, infraducted and abducted), and there may or be partial or complete ptosis. Third nerve palsy in children and other causes of diplopia, ptosis, and anisocoria are discussed separately. (See Third cranial nerve (oculomotor nerve) palsy in children and Overview of diplopia and Overview of ptosis and Approach to the patient with anisocoria.) ANATOMY.
Diplopia, ptosis, and anisocoria are discussed separately.