207-1 Supranuclear Paralysis of Vertical Gaze - novel.utah.edu · Supranuclear Paralysis of...
Transcript of 207-1 Supranuclear Paralysis of Vertical Gaze - novel.utah.edu · Supranuclear Paralysis of...
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207-1 Supranuclear Paralysis
of Vertical Gaze
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A healthy 36 year-old Lieutenant Commander on the day of admission slept late (a rare experience).
He awoke with vertical double vision and mild impairment of balance tending him to veer to the left and bump into objects walking.
His left hand was “clumsy typing” and he was slow constructing sentences.
He had no headache, vertigo, weakness, sensory symptoms or difficulties with his speech.
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Ocular Motility
Global supranuclear vertical gaze palsy, upgaze > downgaze
Vertical oculocephalic movements intact Normal convergence Normal Bell’s reflex Normal horizontal eye movements
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Supranuclear Downgaze Palsy
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Normal Convergence
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Normal Horizontal Saccades Left
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Normal Horizontal Saccades Right
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Additional Signs
Left ocular tilt reaction Left hypotropia Ocular dysmetria Right gaze to center hypermetric Left gaze to center hypometric Light-near dissociation of the pupils
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Light-near Dissociated Pupils
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Figure 1. MRI DWI hyperdensity in the right thalamus extending into the right parasagittal midbrain surrounding the red nucleus
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On follow-up two months later he had: Full vertical gaze with slow saccades up
and down On looking down the eyes lateropulsed to
the left or converged Beats of convergence nystagmus
provoked by a fast upward saccade and Persistent somnolence. He has adopted
the habit of setting 3 alarm clocks to wake him each morning
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Normal Upgaze
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Normal Downgaze
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Figure 2A. Axial T2 MRI Chronic right thalamic infarct
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Figure 2B. Coronal MRI, Chronic right thalamic infarct
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Figure 2C. Sagittal MRI Chronic right thalamic infarct
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Figure 3. Position of the patient’s eyes in (a) straight ahead gaze (b) left gaze (c) right gaze (d) attempted upgaze and (e) attempted downgaze.
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Figure 4 T2 axial and diffusion MRI of the midbrain. The arrows indicate the ischemic lesion at caudal (left) and rostral (right) midbrain levels.
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Figure 5. Histologic cross-section at caudal (left) and rostral (right) midbrain levels showing structures involved in the mediation of vertical gaze. PC, posterior commissure; PUL, pulvinar nucleus of the thalamus; SC, superior colliculus; PG, periaqueductal gray; RN, red nucleus; SN, substantia nigra; 3rd nuc, this cranial nerve nucleus; Int Caps, Internal capsule; rlMLF, rostral interstitial nucleus of the medial longitudinal fasciculus; INC, interstitial nucleus of Cajal.
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Neurology 38(1): 114-22; 1985
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References
Alemdar M, Kamaci MD, Budak F. Unilateral midbrain infarction causing upward and downward gaze palsy. J Neur-Ophthalmol 2006; 26:173-176.
Percheron G. Les arteres du thalamus
humain. Il Arteres et therritores thalamiques paramedians de l’artere basilair communicante. Rev Neurol 1976; 132:309-324.
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Ranalli PJ, Sharpe JA, Fletcher WA. Palsy of upward and downward saccadic, pursuit and vestibular movements with a unilateral midbrain lesion: pathophysiologic correlations. Neurol 1988; 38(1): 114-22.
Trojanowski JQ, Wray SH. Vertical gaze
opthalmoplegia: selective paralysis of downgaze. Neurology 1980; 30:605-610.
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http://www.library.med.utah.edu/NOVEL