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  • Title: Diagnostic value of crossed vs uncrossed acoustic reflexes: eighth nerve and brain stem disorders.
    Author: Jerger S, Jerger J.
    Journal: Arch Otolaryngol; 1977 Aug; 103(8):445-53. PubMed ID: 195563.
    Abstract:
    Acoustic reflexes to crossed (sound in one ear; probe in opposite ear) and uncrossed (sound and probe in the same ear) stimulation were obtained from 17 patients with eighth nerve or brain stem disorders and 20 normal control subjects. Comparison of crossed and uncrossed reflex thresholds provided an important diagnostic tool for differentiating the eighth nerve from the brain stem site. Egihth nerve disorders were usually characterized by diagonal reflex patterns. In contrast, brain stem disorders were usually characterized by horizontal reflex patterns. Detailed evaluation of the reflex time course in two selected patients with intra-axial brain stem disorder showed unusual abnormalities in the crossed acoustic reflex.
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