The pretectal necleus of the optic tract modulates the direction selectivity of accessory optic neurons in rats

Natal, C.L.; Britto, Luiz Roberto Giorgetti de

doi:10.1016/0006-8993(87)90600-7

Cited by 45 publications

(16 citation statements)

References 15 publications

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“…Such features have been observed in the NOT of the California ground squirrel (Major, unpublished observation). The NOT also exhibits significant anatomical and functional interactions with the rest of the AOS, a feature shared by its nonmammalian homologue, the nucleus lentiformis mesencephali (LM; Simpson, 1984;McKenna and Wallman, 1985;Weber, 1985;Natal and Britto, 1987;Wang et al, 2001). As with the avian MTN, the avian LM (specifically, the magnocellular subdivision; LMmc) receives input from displaced ganglion cells (Mpodozis and Karten, unpublished observations).…”

Section: Pretectummentioning

confidence: 95%

Pattern of retinal projections in the California ground squirrel (Spermophilus beecheyi): Anterograde tracing study using cholera toxin

Major

Rodman

Libedinsky

et al. 2003

J of Comparative Neurology

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The retinofugal pathways in the California ground squirrel, Spermophilus beecheyi, were mapped after intravitreal injections of cholera toxin B-subunit. The results of the current study are consistent with work in other mammals and provide new details relevant to the organization and evolution of the visual system. All retinorecipient nuclei received bilateral input, with a contralateral predominance. The suprachiasmatic nucleus is heavily innervated, and sparse terminals were noted in other hypothalamic areas. In addition to the interstitial, medial, lateral, and dorsal terminal nuclei, a few fibers of the accessory optic tract may enter the ventral lateral geniculate and the nucleus of the optic tract, though this innervation may not derive from the same ganglion cells innervating the accessory optic nuclei. Retinal terminals are found in the intergeniculate leaflet and the "dorsal cap" of the ventral lateral geniculate. Retinal fibers pass rostrally from the dorsal cap toward the anterodorsal thalamus, confirming a projection described in the tree shrew and monkeys. Retinal termination patterns in the dorsal lateral geniculate reveal a hexilaminate organization of alternating ipsilateral and contralateral input. Variations in terminal morphology suggest that sublayers receive input from distinct ganglion cell types and that laminar comparisons can be made with primates. Finally, terminal patterns in the superior colliculus reveal a dense, highly ordered columnar organization supporting functional properties of tectal receptive fields. All the visual structures in the ground squirrel are large and well differentiated, making the sciurid visual system an accessible rodent model for comparing visual processing with that in other diurnal vertebrates.

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Section: Pretectummentioning

confidence: 95%

Pattern of retinal projections in the California ground squirrel (Spermophilus beecheyi): Anterograde tracing study using cholera toxin

Major

Rodman

Libedinsky

et al. 2003

J of Comparative Neurology

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“…Given the substantial interconnections among AOS nuclei, and between these nuclei and the NOT, it is not surprising that lesions of the LTN, whose neurons respond to near-vertical movement, can alter the outflow of the NOT/DTN, whose neurons prefer horizontal movement (Collewijn, 1975(Collewijn, ,1977Schoppmann, 1975, 1981;Simpson et al, 1979Simpson et al, ,1988Natal and Britto, 1987). Anatomical, physiological, and behavioral data suggest possible involvement of the AOS nuclei in OKN.…”

Section: Aos-pretectal Nuclear Interconnectionsmentioning

confidence: 95%

Projections of the lateral terminal accessory optic nucleus of the common marmoset (Callithrix jacchus)

Blanks

Clarke

Lui

et al. 1995

J of Comparative Neurology

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The connections of the lateral terminal nucleus (LTN) of the accessory optic system (AOS) of the marmoset monkey were studied with anterograde 3H-amino acid light autoradiography and horseradish peroxidase retrograde labeling techniques. Results show a first and largest LTN projection to the pretectal and AOS nuclei including the ipsilateral nucleus of the optic tract, dorsal terminal nucleus, and interstitial nucleus of the superior fasciculus (posterior fibers); smaller contralateral projections are to the olivary pretectal nucleus, dorsal terminal nucleus, and LTN. A second, major bundle produces moderate-to-heavy labeling in all ipsilateral, accessory oculomotor nuclei (nucleus of posterior commissure, interstitial nucleus of Cajal, nucleus of Darkschewitsch) and nucleus of Bechterew; some of the fibers are distributed above the caudal oculomotor complex within the supraoculomotor periaqueductal gray. A third projection is ipsilateral to the pontine and mesencephalic reticular formations, nucleus reticularis tegmenti pontis and basilar pontine complex (dorsolateral nucleus only), dorsal parts of the medial terminal accessory optic nucleus, ventral tegmental area of Tsai, and rostral interstitial nucleus of the medial longitudinal fasciculus. Lastly, there are two long descending bundles: (1) one travels within the medial longitudinal fasciculus to terminate in the dorsal cap (ipsilateral >> contralateral) and medial accessory olive (ipsilateral only) of the inferior olivary complex. (2) The second soon splits, sending axons within the ipsilateral and contralateral brachium conjunctivum and is distributed to the superior and medial vestibular nuclei. The present findings are in general agreement with the documented connections of LTN with brainstem oculomotor centers in other species. In addition, there are unique connections in marmoset monkey that may have developed to serve the more complex oculomotor behavior of nonhuman primates.

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“…Extensive studies on various species have reported that motionsensitive neurons are selective for the direction and speed of visual stimulus motion in the visual cortex (Maunsell and Van Essen, 1983;Petersen et al, 1985;Hammond et al, 1988;Lisberger and Movshon, 1999;Priebe and Lisberger, 2002;Liu and Newsome, 2003) as well as in the pretectum and the accessory optic system (Winterson and Brauth, 1985;Natal and Britto, 1987;Soodak and Simpson, 1988;Hoffmann and Distler, 1989;Mustari and Fuchs, 1989;Frost et al, 1990;Klauer et al, 1990;Wolf-Oberhollenzer and Kirschfeld, 1994;Li et al, 1996;Fu et al, 1998a,b;Zhang et al, 1999;Gu et al, 2001;Ibbotson and Price, 2001;Wang et al, 2001;Clifford and Ibbotson, 2003;Crowder et al, 2003). However, motion is physically described by its acceleration, as well as its direction and speed.…”

Section: Introductionmentioning

confidence: 99%

Visual Neurons in the Pigeon Brain Encode the Acceleration of Stimulus Motion

Cao¹,

Gu²,

Wang³

2004

J. Neurosci.

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Seeing target motion is a vital capability of the visual system in humans and animals. Physically, motion is described by its acceleration, speed, and direction. Motion-sensitive neurons in all the visual areas examined to date are selective for the direction and speed of motion. Here, we show by single-unit recording that one-third of motion-sensitive neurons in the pigeon's pretectal nucleus also encode the acceleration of stimulus motion. These neurons are characterized by plateau-shaped speed-tuning curves in which the firing rate is the same over a wide range of speeds, a feature that allows these neurons to encode unambiguously the rate of change of speed over time. Acceleration-sensitive neurons also show transient responses to the offset of motion in the preferred and/or nonpreferred directions; acceleration-insensitive neurons do not. We observed the same sensitivity to target acceleration for brief ramps of stimulus speed and for sinusoidal modulation of speed. The locations of acceleration-sensitive and -insensitive neurons are segregated in the pretectal nucleus. The visual responses of pretectal neurons indicate that the visual and vestibular systems share not only a spatial but also a temporal reference frame that can detect the acceleration produced by self-motion of an organism.

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The pretectal necleus of the optic tract modulates the direction selectivity of accessory optic neurons in rats

Cited by 45 publications

References 15 publications

Pattern of retinal projections in the California ground squirrel (Spermophilus beecheyi): Anterograde tracing study using cholera toxin

Pattern of retinal projections in the California ground squirrel (Spermophilus beecheyi): Anterograde tracing study using cholera toxin

Projections of the lateral terminal accessory optic nucleus of the common marmoset (Callithrix jacchus)

Visual Neurons in the Pigeon Brain Encode the Acceleration of Stimulus Motion

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