Conjugate eye deviation after acute hemispheric stroke: delayed recovery after previous contralateral frontal lobe...

Area of Science:

• Neurology
• Neuroscience
• Ophthalmology

Background:

• Acute hemispheric stroke can cause conjugate eye deviation.
• The duration and prognostic significance of this deviation are not fully understood.

Purpose of the Study:

• To investigate the duration of conjugate eye deviation in acute hemispheric stroke.
• To explore the potential role of frontal eye fields in the recovery of eye movement.

Main Methods:

• Observational study of 42 patients with acute unilateral hemispheric stroke.
• Clinical assessment of conjugate eye deviation and other focal neurological deficits.
• Analysis of recovery patterns and correlation with lesion location.

Main Results:

• Conjugate eye deviation resolved within 48 hours in 57% of patients and within 5 days in 90%.
• Early eye deviation recovery occurred independently of other focal neurological deficits.
• Prolonged eye deviation (13-43 days) was observed in 6 patients with contralateral frontal region damage.

Conclusions:

• Early resolution of conjugate eye deviation in hemispheric stroke is common.
• The unaffected contralateral frontal eye field may mediate early recovery of conjugate eye deviation.
• Preexisting contralateral frontal damage may be associated with prolonged eye deviation.