Lateral geniculate unit activity and eye movements: Saccade-locked changes in dark and in light

Jeannerod, Marc; Putkonen, P. T. S.

doi:10.1007/bf00234284

Cited by 45 publications

(17 citation statements)

References 25 publications

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“…Physiological results in the superficial layers of the SC (Robinson & Wurtz, 1976;Peck, 1984) and in the LGN (Jeannerod & Putkonen, 1971) are consistent with this hypothesis. Physiological results in the superficial layers of the SC (Robinson & Wurtz, 1976;Peck, 1984) and in the LGN (Jeannerod & Putkonen, 1971) are consistent with this hypothesis.…”

Section: Functional Role Of the Tecto-geniculate Pathwaysupporting

confidence: 77%

Influence of the superior colliculus on responses of lateral geniculate neurons in the cat

et al. 1994

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The superior colliculus (SC) projects to all layers of the cat's lateral geniculate nucleus (LGN) and thus is in a position to influence information transmission through the LGN. We investigated the function of the tecto-geniculate pathway by studying the responses of cat LGN neurons before, during, and after inactivating the SC with microinjections of lidocaine. The LGN cells were stimulated with drifting sine-wave gratings that varied in spatial frequency and contrast. Among 71 LGN neurons that were studied, 53 showed a statistically significant change in response during SC inactivation. Control experiments with mock injections indicated that some changes could be attributed to slow waxing and waning of responsiveness over time. However, this could not account for all of the effects of SC inactivation that were observed. Forty cells showed changes that were attributed to the removal of tecto-geniculate influences. About equal numbers of cells showed increases (22 cells) and decreases (18 cells) in some aspect of their response to visual stimuli during SC inactivation. The proportion of cells that showed tecto-geniculate influences was somewhat higher in the C layers (68% of the cells) than in the A layers (44% of the cells). In addition, among cells that showed a significant change in maximal response to visual stimulation, the change was larger for cells in the C layers (64% average change) than in the A layers (26% average change) and it was larger for W cells (61% average change) than for X and Y cells (29% average change). Nearly all of the X cells that showed changes had an increase in response, and nearly all of the Y cells had a decrease in response. In addition, across all cell classes, 80% of the cells with receptive fields <15 deg from the area centralis had an increase in response, and 80% of the cells with receptive fields >15 deg from the area centralis had a decrease in response. None of the LGN cells had significant changes in spatial resolution, and only three cells had changes in optimal spatial frequency. Ten cells had a change in contrast threshold, 25 cells had a change in contrast gain, and 29 cells had a change in the maximal response to a high-contrast stimulus. Thus, our results suggest that the tecto-geniculate pathway has little or no effect on spatial processing by LGN neurons. Rather, the major influence is on maximal response levels and the relationship between response and stimulus contrast. Several hypotheses about the role of the tecto-geniculate pathway in visual behavior are considered.

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Section: Functional Role Of the Tecto-geniculate Pathwaysupporting

confidence: 77%

Influence of the superior colliculus on responses of lateral geniculate neurons in the cat

et al. 1994

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“…Burst activity of geniculate cells with rapid eye movements of sleep was observed by Sakakura, (1968). During vestibular nystagmus in the ence'phale isole6 cat, Jeannerod & Putkonen (1971) found that activity of 66 % of geniculate cells was modified. By recording multiple -unit activity from the optic radiation of ence'phale isole6 cats, Corazza & Lombroso, (1970) (Jouvet & Michel, 1959;Bizzi, & Brooks 1963;Mouret, Jeannerod & Jouvet, 1963;Munson & Schwartz, 1972 Ogawa's observation (1972) in the squirrel monkey.…”

Section: Resultsmentioning

confidence: 93%

“…This facilitation was not found in the present study during spontaneous eye movements. A similar explanation may be given for the observation of Jeannerod & Putkonen (1971) during vestibular nystagmus in the encephale isole cat. Although they found that about one third of geniculate cells changed activity with nystagmic eye movements in complete darkness, we did not find any responsive cells during spontaneous eye movements (H. Noda & W. R. Adey, unpublished).…”

Section: Resultsmentioning

confidence: 94%

Influence of eye movements on geniculo‐striate excitability in the cat

Adey¹,

Noda²

1973

The Journal of Physiology

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3. The post-synaptic components of the cortical response were enhanced for about 200 msec, reaching a peak at approximately 150 msec after the initiation of an eye movement. Although this facilitation occurred also in complete darkness, it did not occur when the visual field was abruptly shifted while the eyes were stationary. The fact that it occurred with eye movements and exclusively in the post-synaptic components suggests that it was caused by signals from a system closely related to eye movements. This may be a manifestation of the corollary mechanism.

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“…Single cell recordings at the LGd level in relation to saccades were started by JEANNEROD and PUTKONEN [18,19] in enc6phale isol6 cats. These authors showed modifications of spontaneous unit activity tightly related to saccades in the dark.…”

Section: Genieulo-cortical Pathwaymentioning

confidence: 99%

Corollary discharge: Its possible implications in visual and oculomotor interactions

1979

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Abstract--Data concerning the possible role of a corollary discharge mechanism in the regulation of visual-oculomotor interactions are reviewed. Several modes of action for such a mechanism on the processing of visual information are discussed. Mere suppression of visual input during saccades is considered mostly as a peripheral mechanism. It is proposed that corollary discharge could either produce an active cancellation of the effects of eye movements on vision, or contribute to the evaluation that a given visual change is provoked by a saccade. Cancellation could occur at subcortical levels of visual processing although evaluation could occur at the cortical level.

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Lateral geniculate unit activity and eye movements: Saccade-locked changes in dark and in light

Cited by 45 publications

References 25 publications

Influence of the superior colliculus on responses of lateral geniculate neurons in the cat

Influence of the superior colliculus on responses of lateral geniculate neurons in the cat

Influence of eye movements on geniculo‐striate excitability in the cat

Corollary discharge: Its possible implications in visual and oculomotor interactions

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