The effect of motor activity on the reactivity of single visual units in the crayfish.

Metal microelectrodes were chronically implanted in the optic nerve and circumesophageal commissure of the crayfish. The activity from single units was recorded in freely moving animals, and responsiveness to visual stimuli was found correlated with motor activity of the animal. The lowest firing rate corresponded to states of quietness and the highest to fighting reactions. The two types of visual units studied showed a different degree of modulation. The sustaining fibers, which signal the intensity of illumination, were facilitated at all levels of motor excitation. The movement fibers, which are phasic units, reacted to great enhancements of motor activity by an increased number of spikes in each response to movement, and by a lowering in the rate of “habituation.” This facilitatory influence is neural in origin, presumably conveyed by the “activity” fibers, which run efferently in the optic nerve, carrying information about movement of the various body parts.

[1]  B. Bush,et al.  EFFERENT MECHANORECEPTIVE RESPONSES IN THE OPTIC NERVE OF THE CRAB PODOPHTHALMUS. , 1964, Journal of cellular and comparative physiology.

[2]  H. Maturana,et al.  Synaptic Connections of the Centrifugal Fibers in the Pigeon Retina , 1965, Science.

[3]  W. Cowan,et al.  The organization of the projection of the centrifugal fibres to the retina in the pigeon. , 1966, Journal of anatomy.

[4]  J. Young.  The optic lobes of Octopus vulgaris , 1962, Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences.

[5]  K. Motokawa.  MECHANISMS FOR THE TRANSFER OF INFORMATION ALONG THE VISUAL PATHWAYS. , 1963, International review of neurobiology.

[6]  M. Meulders,et al.  Changes of photically evoked potentials in the visual pathway of the cerveau isolè cat , 1959 .

[7]  B. Cragg.  Centrifugal fibers to the retina and olfactory bulb, and composition of the supraoptic commissures in the rabbit , 1962 .

[8]  C. Wiersma,et al.  Electrical responses in decapod crustacean visual systems. , 1963, Journal of cellular and comparative physiology.

[9]  J. Wolter,et al.  PATHWAY OF CENTRIFUGAL FIBRES IN THE HUMAN OPTIC NERVE, CHIASM, AND TRACT*† , 1965, The British journal of ophthalmology.

[10]  B. Bush,et al.  EFFERENT VISUAL RESPONSES OF CONTRALATERAL ORIGIN IN THE OPTIC NERVE OF THE CRAB PODOPHTHALMUS. , 1964, Journal of cellular and comparative physiology.

[11]  T. Suzuki,et al.  Effects of optic nerve section on the ERG. , 1962, Archives of ophthalmology.

[12]  L. B. Arey.  The function of the efferent fibers of the optic nerve of fishes , 1916 .

[13]  John Zachary Young,et al.  The retina of cephalopods and its degeneration after optic nerve section , 1962, Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences.

[14]  R. Glantz.  Light adaptation in the photoreceptor of the crayfish, Procambarus clarki. , 1968, Vision research.

[15]  T. Powell,et al.  Centrifugal Fibres to the Retina in the Monkey and Cat , 1965, Nature.

[16]  C. J. Herrick.  The amphibian forebrain. VI. Necturus , 1933 .

[17]  B. Boycott,et al.  OCTOPUS OPTIC RESPONSES. , 1965, Experimental neurology.

[18]  J. Jacobson,et al.  CENTRIFUGAL INFLUENCE ON THE ELECTRORETINOGRAM , 1958, Annals of the New York Academy of Sciences.

[19]  C. Wiersma,et al.  Circadian rhythm of responsiveness in crayfish visual units. , 1969, Journal of neurobiology.

[20]  G. Brindley,et al.  Evidence that a cat's electroretinogram is not influenced by impulses passing to the eye along the optic nerve , 1962, The Journal of physiology.

[21]  K. Motokawa,et al.  Antidromic stimulation of optic nerve and photosensitivity of cat retina. , 1954, Journal of neurophysiology.

[22]  D. N. Spinelli,et al.  CENTRIFUGAL OPTIC NERVE RESPONSES EVOKED BY AUDITORY AND SOMATIC STIMULATION. , 1965, Experimental neurology.

[23]  N. Abe.  Effect of section and compression of the optic nerve on the ERG in the rabbit. , 1962, The Tohoku journal of experimental medicine.

[24]  H. Maturana.  Efferent fibres in the optic nerve of the toad (Bufo bufo). , 1958, Journal of anatomy.

[25]  R. Lund,et al.  Centrifugal fibers to the retina of Octopus vulgaris. , 1966, Experimental neurology.

[26]  The integration of visual stimuli in the rock lobster. , 1967, Vision research.

[27]  L. Fanjul,et al.  Role of the pupillary mechanism in the process of habituation of the visual pathways. , 1961, Electroencephalography and clinical neurophysiology.

[28]  D. N. Spinelli,et al.  Afferent and efferent activity in single units of the cat's optic nerve. , 1966, Experimental neurology.

[29]  C. Wiersma,et al.  “Descending” neuronal units in the commissure of the crayfish central nervous system; and their integration of visual, tactile and proprioceptive stimuli , 1965, The Journal of comparative neurology.

[30]  T. Yamaguchi,et al.  The neuronal components of the optic nerve of the crayfish as studied by single unit analysis , 1966, The Journal of comparative neurology.

[31]  R. Granit.  Centrifugal and antidromic effects on ganglion cells of retina. , 1955, Journal of neurophysiology.

[32]  G. Brindley,et al.  Histological evidence against the view that the cat's optic nerve contains centrifugal fibres , 1966, The Journal of physiology.