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  • Title: Orienting reaction in patients with multiple sclerosis.
    Author: Rogozea R, Florea-Ciocoiu V.
    Journal: Pavlov J Biol Sci; 1986; 21(4):148-55. PubMed ID: 3785988.
    Abstract:
    A polygraphic study of the somatic (EMG), autonomic (finger plethysmogram, galvanic skin reaction, respiration, pulse, and EEG (acoustic-evoked potential and EEG-blocking reaction) components of the orienting reaction elicited by an auditory stimulus was performed in 71 patients with multiple sclerosis and in 74 matched normal subjects (control group). The study showed a significantly less intense orienting reaction in patients with multiple sclerosis than in control normal subjects. The severity of this responsiveness disturbance depended on the patients' age at symptom onset, major symptom types on admission, and the relapse frequency. The orienting reaction changes found in patients with multiple sclerosis may be ascribed to the diffuse demyelinating lesions in the nervous system of these patients, which generate, apart from the so polymorphous clinical manifestations of this disease, also important responsiveness disturbances.
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