Diseases of the nervous system : a text-book of neurology and psychiatry . mus must be examined with the head in the three planes; a patientwith vestibular nystagmus tends to rotate within the plane of thenystagmus, and in the direction opposite to that of the quick nystagmusmovement. A patient with vestibular nystagmus then, who bends his head for-ward at 90 degrees will rotate in a direction directly opposite if he bendhis head backward 90 degrees. The laws of intracerebellar nystagmus,apart from actual vestibular disease, remains to be investigated (con- SYMPTOMS 409 jugate deviations, skew
Diseases of the nervous system : a text-book of neurology and psychiatry . mus must be examined with the head in the three planes; a patientwith vestibular nystagmus tends to rotate within the plane of thenystagmus, and in the direction opposite to that of the quick nystagmusmovement. A patient with vestibular nystagmus then, who bends his head for-ward at 90 degrees will rotate in a direction directly opposite if he bendhis head backward 90 degrees. The laws of intracerebellar nystagmus,apart from actual vestibular disease, remains to be investigated (con- SYMPTOMS 409 jugate deviations, skew deviations, and other eye displacements areto be interpreted in the light of forced movements having theiranalogies to nystagmus, and are considered in the chapter onMidbrain Disease. See illustrations of conjugate palsies; also inchapter on the Eye Paths. See plate of oculorotary and cephalorotarymechanisms (Plate VIII). Closely associated with disorder of the vestibular system are painin the muscles of the neck, nausea, vomiting, amblyopias, and loss Fig. 213.—Asynergia of Babinski devel-oped on attempting to take hold of a fingers are held very far open.(Thomas.)
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