Summary
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1.
Multi- and single-unit recordings in the torus longitudinalis (TL) of the percoid fishes,Holocentrus andEugerres, showed two kinds of response. The first was a predominantly sustained discharge to dimming in the contralateral visual field. TL receptive fields were always found close to the equator of this field, with their naso-temporal position mapping onto the rostro-caudal axis of TL.
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2.
The second type of activity was a bursting discharge synchronized with saccadic eye movements. Because these bursts persisted in the dark and after paralysis with Flaxedil, but were not evoked by passive eye movements, they appear to constitute a corollary discharge. Although the burst magnitude was correlated with saccade amplitude, there was no evidence for the encoding of saccade direction.
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3.
The two response types appear to be generated by two classes of neurons because visual responses were generally recorded more superficially in TL than saccadic bursts, and the single units recorded gave either visual or saccadic responses.
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4.
Electrical stimulation experiments provided evidence for reciprocal topographic interconnection between TL and its adjacent tectum.
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Abbreviations
- SM :
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stratum marginale
- TL :
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torus longitudinalis
References
Ariëns Kappers CU, Huber GC, Crosby EC (1936) The comparative anatomy of the nervous system of vertebrates, including man, vol 2. McMillan, reprinted by Hafner, New York (1965)
Cronly-Dillon JR (1964) Units sensitive to direction of movement in goldfish optic tectum. Nature 203:214–215
Easter SS, Johns PR (1974) Horizontal compensatory eye movements in goldfish (Carassius auratus). II. A comparison of normal and deafferented animals. J Comp Physiol 92:37–57
Ebbesson SOE, Vanegas H (1976) Projections of the optic tectum in two teleost species. J Comp Neurol 165:161–180
Fuchs AF, Robinson DA (1966) A method for measuring horizontal and vertical eye movement chronically in the monkey. J Appl Physiol 21:1068–1070
Grover BG, Sharma SC (1979) Tectal projections in the goldfish (Carassius auratus): a degeneration study. J Comp Neurol 184:435–454
Grover BG, Sharma SC (1981) Organization of extrinsic tectal connections in goldfish (Carassius auratus). J Comp Neurol 196:471–488
Harris AJ (1965) Eye movements of the dogfishSqualus acanthias L. J Exp Biol 43:107–130
Hermann HT (1971) Saccade correlated potentials in optic tectum and cerebellum of goldfish. Brain Res 26:293–304
Ito H (1971) Fine structure of the carp torus longitudinalis. J Morphol 135:153–164
Ito H, Kishida R (1978) Afferent and efferent fiber connections of the carp torus longitudinalis. J Comp Neurol 181:465–476
Jacobson M, Gaze RM (1964) Types of visual response from single units in the optic tectum and optic nerve of the goldfish. Q J Exp Physiol 49:199–209
Johnstone JR, Mark RF (1969) Evidence for efference copy for eye movements in fish. Comp Biochem Physiol 30:931–939
Kase M, Miller DC, Noda H (1980) Discharges of Purkinje cells and mossy fibres in the cerebellar vermis of the monkey during saccadic eye movements and fixation. J Physiol (Lond) 300:539–555
Kidokoro Y (1968) Direct inhibitory innervation of teleost oculomotor neurons by cerebellar Purkinje cells. Brain Res 10:453–456
Kishida R (1979) Comparative study on the teleostean optic tectum. Lamination and cytoarchitecture. J Hirnforsch 20:57–67
Kotchabhakdi N (1976) Functional organization of the goldfish cerebellum. J Comp Physiol 112:75–93
Luiten PGM (1981) Afferent and efferent connections of the optic tectum in the carp (Cyprinus carpio L). Brain Res 220:51–65
Mark RF, Davidson TM (1966) Unit responses from commissural fibers of optic lobes of fish. Science 152:797–799
Niida A, Oka H, Iwata KS (1980) Visual responses of morphologically identified tectal neurons in the crucian carp. Brain Res 201:361–371
Northmore DPM (1982) Visuotopic mapping and corollary discharge in the torus longitudinalis of goldfish. Invest Ophthalmol Visual Sci (Suppl) 22:237
O'Benar JD (1976) Electrophysiology of neural units in goldfish optic tectum. Brain Res Bull 1:529–541
Richmond BJ, Wurtz RH (1980) Vision during saccadic eye movements. II. A corollary discharge to monkey superior colliculus. J Neurophysiol 43:1156–1167
Schroeder DM, Vanegas H, Ebbesson SOE (1980) Cytoarchitecture of the optic tectum of the squirrelfish,Holocentrus. J Comp Neurol 191:337–351
Sperry RW (1950) Neural basis of the spontaneous optokinetic response produced by visual inversion. J Comp Physiol Psychol 43:482–489
Sutterlin AM, Prosser CL (1970) Electrical properties of goldfish optic tectum. J Neurophysiol 33:36–45
Vanegas H, Laufer M, Amat J (1974) The optic tectum of a perciform teleost. I. General configuration and cytoarchitecture. J Comp Neurol 154:43–60
Vanegas H, Williams B, Freeman JA (1979) Responses to stimulation of marginal fibers in the teleostean optic tectum. Exp Brain Res 34:335–349
Zenkin GM, Pigarev IN (1969) Detector properties of the ganglion cells of the pike retina. Biophysics 14:763–772
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Northmore, D.P.M., Williams, B. & Vanegas, H. The teleostean torus longitudinalis: Responses related to eye movements, visuotopic mapping, and functional relations with the optic tectum. J. Comp. Physiol. 150, 39–50 (1983). https://doi.org/10.1007/BF00605286
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DOI: https://doi.org/10.1007/BF00605286