Déviation conjuguée

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The déviation conjuguée ( French for “united deviation”) or conjugated deviation , also known as the prévost sign after the descriptor Jean Louis Prévost , is a sudden, involuntary and uncontrollable turning of the gaze in pathological conditions of the frontal brain . It is a movement of both eyes (version) in the same direction in one and the same direction without the occurrence of a squint deviation . The cause is a temporary or permanent dysfunction of the frontal eye field . Damage to this area of ​​the brain, as in a stroke, leads to eye movement to the side of the lesion ("focus view"). An equally involuntary rotation of the head in the same direction can also occur. In the case of partial seizures in the frontal lobe area, however, the eye is turned to the healthy side. The paretic déviation conjuguée (in the case of infarction) can be overcome briefly by rapid passive head turning (triggering of the vestibulo-ocular reflex ). Even if the bridge ( pons ) is damaged , a divergent view can occur; it is then directed to the opposite side of the lesion and cannot be overcome by passive head movements.

See also

literature

  • Jean Louis Prévost: De la déviation conjugée des yeux et de la rotation de la tête dans certains cas d'hémiplégie. Dissertation. Paris 1868.