Abstract
We demonstrate model visual cortical circuits which exhibit robust contrast adaptation properties, consistent with physiological observations in V1. The adaptation mechanism we employ is activity-dependent synaptic depression at thalamocortical and local intra-cortical synapses. Model contrast response functions (CRF) shift so that cells remain maximally responsive to changes around the recent average stimulus contrast level. Hysteresis effects for both stimulus contrast and orientation are achieved; orientation hysteresis is weaker, and depends exclusively on intracortical adaptation. Following stimulation of the receptive field (RF) surround, RFs dynamically expand to “fill in” for the missing stimulation in the RF center; in our model this expansion results from adaptation of local inhibitory synapses, triggered by excitation from long range horizontal projections. All adaptation effects are achieved using the same synaptic depression mechanisms.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
D.G. Albrecht, S.B. Farrar, and D.B. Hamilton (1984) J. Physiol. 347: 713–739.
C. Blakemore, R.H.S. Carpenter, and M. Georgeson (1970). Nature 228: 37–39.
A.B. Bonds (1991) Vis. Neurosci. 6: 239–255.
G.C. DeAngelis, A. Anzai, I. Ohzawa, and R.D. Freeman (1995). Proc. Natl. Acad. Sci (USA) 92: 9682–9686.
E.J. DeBruyn and A.B. Bonds (1986). Brain Research. 383: 339–342.
R.J. Douglas, K.A.C. Martin, and D. Whitteridge (1988). Nature 332: 642–644.
D.J. Heeger (1992). Vis. Neurosci. 9: 181–197.
L. Maffei, A. Fiorentini, and S. Bisti (1973). Science. 182: 1036–1038.
D.A. McCormick, B.W. Connors, J.W. Lighthall, and D.A. Prince, D.A. (1985). J. Neurophysiol., 54: 782.
J. McLean and L.A. Palmer. (1996) Invest. Opthalmol. and Vis. Sci. Suppl. 37 (3): 2197.
J.A. Movshon and P. Lennie (1979). Nature 278: 850–852.
S.B. Nelson (1991). J. Neurosci. 11: 344–56.
S.B. Nelson, J.A. Varela, K. Sen, and L.F. Abbott (1996). CNS96 Proceedings, Submitted.
Ohzawa, G. Sclar, and R.D. Freeman (1985). J. Neurophysiol. 54: 651–667.
M.W. Pettet and C.D. Gilbert (1992). Proc. Natl. Acad. Sci (USA) 89: 8366–8370.
G. Sclar, 1. Ohzawa, and R.D. Freeman (1985). J. Neurophysiol. 54: 666–673.
D.C. Somers, S.B. Nelson, and M. Sur (1995) J. Neurosci. 15: 5448–5465.
D.C. Somers, E.V. Todorov, A.G. Siapas, and M. Sur (1996) CNS96 Proceedings, this volume.
T.R. Vidyasagar (1990). Neuroscience 36: 175–179.
Worgotter, F. and Koch, C. (1991). J. Neurosci. 11: 1959.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1997 Springer Science+Business Media New York
About this chapter
Cite this chapter
Todorov, E.V., Siapas, A.G., Somers, D.C., Nelson, S.B. (1997). Modeling Visual Cortical Contrast Adaptation Effects. In: Bower, J.M. (eds) Computational Neuroscience. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9800-5_83
Download citation
DOI: https://doi.org/10.1007/978-1-4757-9800-5_83
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4757-9802-9
Online ISBN: 978-1-4757-9800-5
eBook Packages: Springer Book Archive