+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Single unit responses to visual stimuli in cat cortical areas 17 and 18 1. responses to stationary stimuli of variable intensity



Single unit responses to visual stimuli in cat cortical areas 17 and 18 1. responses to stationary stimuli of variable intensity



Archives Italiennes de Biologie 117(3): 208-230



Single unit responses to light increments of stationary stimuli were recorded from the visual cortex (areas 17 and 18) of locally anesthetized, Flaxedil-paralyzed and artifically ventilated cats. Since complex and hypercomplex cells gave a very weak on-off response, if any, to a stationary stimulus, the present investigation concerns only the activity of non-oriented cells, simple cells and geniculo-cortical (GC) fibers. These units increase their firing rate over a range of light stimulus intensity of 2.6 .+-. 0.6 log units, 1.7 .+-. 0.6 log units and 2.1 .+-. 0.5 log units, respectively. The neural responses of non-oriented cells and simple cells and GC fibers depend on the intensity of both stimulus and adaptive background, that is on the contrast of the visual stimulus. Different levels of background illumination influence the contrast threshold response of simple cells. An attempt is made to relate the neurophysiological data in the cat to other psychophysical data of others in the cat and in man.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 006422292

Download citation: RISBibTeXText

PMID: 508041


Related references

Single unit responses to visual stimuli in cat cortical areas 17 and 18 2. responses to stationary stimuli of variable duration. Archives Italiennes de Biologie 117(3): 231-247, 1979

Single unit responses to visual stimuli in cat cortical areas 17 and 18 3. responses to moving stimuli of variable velocity. Archives Italiennes de Biologie 117(3): 248-267, 1979

Analysis of rhythmic activity within responses of visual cortical cells to stationary flashing stimuli. Society for Neuroscience Abstracts 26(1-2): Abstract No -449 6, 2000

Cortical unit responses to visual stimuli in nonanesthetized cats. American Journal of Ophthalmology 46(3 Part 2): 110-21; Discussion 121-2, 1958

Responses of simple and non-oriented cells to stimuli of variable duration in areas 17 and 18 of cat visual cortex. Archivio di Scienze Biologiche 60(1-4): 59-65, 1976

Responses to moving stimuli of single cells in the cat visual areas 17 and 18. Brain Research 55(2): 451-454, 1973

Characteristics of responses in the cat parietal and visual cortical areas to photic stimuli with different biological significance. Zhurnal Vysshei Nervnoi Deyatel'nosti Imeni I P Pavlova 23(5): 1003-1010, 1973

Velocity selectivity in the cat visual system. I. Responses of Lgn cells to moving bar stimuli: a comparison with cortical areas 17 and 18. Journal of Neurophysiology 54(4): 1026-1049, 1985

Velocity selectivity in the cat visual system. I. Responses of LGN cells to moving bar stimuli: a comparison with cortical areas 17 and 18. Journal of Neurophysiology 54(4): 1026-1049, 1985

Participation of the visual projection and association cortical inputs in the formation of responses of neostriatal responses to visual stimuli in the alert cat. Neirofiziologiia 17(5): 619-627, 1985

Single-unit responses to moving visual stimuli in middle suprasylvian gyrus of the cat. Journal of Neurophysiology 34(1): 47-55, 1971

Velocity selectivity in the cat visual system i responses of lateral geniculate nucleus cells to moving bar stimuli a comparison with cortical areas 17 and 18. Journal Of Neurophysiology (bethesda): 1026-1049, 1985

Somatosensory evoked potentials and cortical single unit responses elicited by mechanical tactile stimuli in awake monkeys. Electroencephalography & Clinical Neurophysiology 58(6): 537-552, 1984

Coding of visual moving stimuli parameters in visual system of the cat. II. Dependence of responses of single directionally sensitive neurons upon parameters (velocity, brightness and movement direction) of two stimuli simultaneously presented in the receptive field. Sensornye Sistemy 17(2): 114-123, 2003

Somatosensory evoked potentials (SEPs) and cortical single unit responses elicited by mechanical tactile stimuli in awake monkeys. Electroencephalography and Clinical Neurophysiology 58(6): 537-552, 1984