Isolated Inferior Rectus Palsy as a Result of Paramedian Thalamopeduncular Infarction

Unusual presentations of cavernous carotid aneurysms: Further evidence for topographic organization of the oculomotor nerve

“…Although there are reports of cavernous carotid aneurysms causing a divisional palsy [3][4][5], to our knowledge isolated elevation deficit without ptosis due to aneurysmal compression of the third nerve in the cavernous sinus region has not been previously reported. Moreover we did not come across any prior reports of isolated inferior rectus palsy in association with cavernous carotid aneurysms although inferior rectus palsy in patients with midbrain lesions is well reported [18][19][20]. Case 2, therefore, represents a unique presentation of selective inferior rectus oculomotor paresis with possible pupillary involvement due to CCA.…”

“…Likewise the superomedial location of the pupillo-motor fibers at the oculomotor nerve exit from the midbrain to the subarachnoid space has been shown in experiments conducted on dogs [24,25]. A number of reports describe various forms of partial oculomotor paresis caused by midbrain fascicular lesions [7][8][9][10][11][18][19][20][21].…”

“…Several case reports have demonstrated that paresis of a single muscle subserved by the oculomotor complex can occur from a lesion that is located anywhere from the oculomotor nucleus to the myoneural junction [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. A superior division third nerve palsy causing isolated elevation deficit and ptosis is often present with lesions in the cavernous sinus-orbital apex region.…”

Neuro-ophthalmologic manifestations of systemic disease and neurologic disease

“…Another MRI-documented lesion that caused isolated IRM palsy was presented by Tezer et al [21]. Two patients with isolated IRM palsy caused by unilateral paramedian thalamopeduncular infarction were identified.…”

Brain stem tuberculoma presenting with isolated ocular motility abnormality: A series of two cases and review of literature

“…[1] Isolated brain stem tuberculomas are rare lesions and account for about 5% of all intracranial tuberculomas. [2] These intracranial lesions commonly present as oculomotor and other cranial nerve palsies,[34] unilateral saccadic paralysis, one and a half syndrome, other ocular signs, and neurological deficits. In this article, the authors describe two cases of isolated ocular motility abnormality due to brain stem tuberculoma.…”