Ocular bobbing

Daroff, Robert B.; Waldman, A. L.

doi:10.1136/jnnp.28.4.375

Cited by 28 publications

(5 citation statements)

References 8 publications

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“…Experimental evidence in animals with acute chlorambucil intoxication suggests that the immature brain may be at greater risk for developing myoclonic seizure activity than is the mature organism. Lion et a1 [4] detected a difference in the response of kittens, which displayed polyspike and wave EEG patterns without motor phenomena progressing to flexor myoclonus, in contrast to older cats, which showed major motor or tonic seizures.…”

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confidence: 98%

Inverse ocular bobbing

Somasundaram

Schutta

1981

Annals of Neurology

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confidence: 98%

Inverse ocular bobbing

Somasundaram

Schutta

1981

Annals of Neurology

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“…According to Daroff and Waldman [7], ocular bobbing results from a pathological neuronal activity issuing from the medulla oblongata, while the latter is undamaged. These authors base their conclusions on Cogan' s [6] assertion that a vertical nystagmus limited to the downwards gaze would be tvpieal of lesions of the medulla oblongata.…”

Section: Discussionmentioning

confidence: 99%

Ocular Bobbing: Abnormal Eye Movement or Eye Movement’s Abnormality?

et al. 1983

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Ocular bobbing is classified as an abnormal eye movement, resulting from pathological neuronal activity of the brain stem after bilateral pontine lesions. Clinical and oculographic study of 5 patients suffering from ocular bobbing shows that upwards voluntary eye movements are abnormal. We suggest that ocular bobbing should not to be regarded as an abnormal eye movement, but, rather, as the only residual movement of patients which are totally deprived of both horizontal and upward movements.

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“…Upbeat nystagmus Large amplitude primary position nystagmus with the fast phase upwards, increasing on elevation but diminishing with down gaze, may be associated with dysfunction of the anterior vermis of the cerebellum (Daroff and Troost, 1973).…”

Section: Rebound Nystagmusmentioning

confidence: 99%

Perspectives in neuro-ophthalmology.

Sanders¹

1974

British Journal of Ophthalmology

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Of the 3 million or so fibres that enter the primate brain, two-thirds originate within the eyes (Weiskrantz, 1972) (Kestenbaum, 1946; Cogan, I948; Walsh, I947; Walsh and Hoyt, I969), but necessitated some understanding of the commensurate advances in neuro-anatomy, neuro-pharmacology, visual physiology, and biomedical engineering. This review will attempt to align some of the information and concepts established by these basic disciplines and harness them for use by the clinical ophthalmologist. The first part will be confined to the visual sensory system and the second to the oculo-motor system. Sensory systemThe visual process commences at a retinal level, where I 30 million light-sensitive receptors in each eye initiate a neural process terminating in the brain, where intricate analysis produces a three-dimensional picture which is related to past experience and includes colour, form, and rate of movement. Understanding of this organization began when Kuffler (I953) at the Johns Hopkins Hospital discovered that some analysis of visual information occurred in the retina of cats. The area of receptor mosaic in the retina feeding into a single visual cell is the receptive field of the cell. This fundamental concept was established by Hartline (I940) and utilized in the visual system pre-eminently by two distinguished workers from Harvard University, H. Hubel and T. N. Wiesel. The method depends on a microelectrode recording from a solitary visual cell, which can record from the cell for prolonged periods without impairing function. RETINAL ORGANIZATIONThe receptive fields of ganglion cells are made up of a circular central region concentric with a larger circular surround region which is antagonistic to the central area. The cell is classed as an "on centre" cell when a light projected on the central area produces a response, but if the light is shone on the antagonistic surround the response is inhibited and the surround is termed an "off surround". The other class of ganglion cell has an "off centre" with an "on surround". This organization tends to enhance contours and the "on" and"off" areas tend reciprocally to reinforce their respective actions (Bishop, I964). Extensive

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Ocular bobbing

Cited by 28 publications

References 8 publications

Inverse ocular bobbing

Inverse ocular bobbing

Ocular Bobbing: Abnormal Eye Movement or Eye Movement’s Abnormality?

Perspectives in neuro-ophthalmology.

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