Skip to main content
×
Home

How task-related are the responses of inferior temporal neurons?

  • Rufin Vogels (a1), Gyula Sáry (a1) and Guy A. Orban (a1)
Abstract
Abstract

The responses of inferior temporal (IT) neurons may depend on the behavioral context of the stimuli; e.g. in Konorski tasks responses to two successively presented physically identical stimuli can be markedly different. This effect has been interpreted as being linked to the behavioral task, and to be involved in short-term memory and/or the temporal comparison of successively presented stimuli. We tested whether this behavioral context effect also occurs when the monkey is not executing a Konorski task, i.e. no temporal comparison of stimuli is being performed. Responses of the same IT neurons under two behavioral conditions were compared using the same temporal stimulus sequence (but different stimuli): a Konorski task and a Fixation task. We found that the occurrence of the behavioral context effect did not depend on the execution of the short-term memory task. The observed decline in the level of responses to repeated presentation of similar stimuli is interpreted as being a passive mechanism involved in recency detection, which occurs even if the recency information is not useful for the task. The importance of these results in the interpretation of “task-related” neuronal responses is discussed.

Copyright
References
Hide All
Baylis G.C. & Rolls E.T. (1987). Responses of neurons in the inferior temporal cortex in short term and serial recognition memory tasks. Experimental Brain Research 65, 614622.
Chelazzi L., Miller E.K., Duncan J. & Desimone R. (1993). A neural basis for visual search in inferior temporal cortex. Nature 363, 345347.
Desimone R., Allbright T.D., Gross C.G. & Bruce C.J. (1984). Stimulus-selective properties of inferior temporal neurons in the macaque. Journal of Neuroscience 4, 20512062.
Eskandar E.N., Richmond B.J. & Optican L.M. (1992 a). Role of inferior temporal neurons in visual memory I. Temporal encoding of information about visual images, recalled images, and behavioral context. Journal of Neurophysiology 68, 12771295.
Eskandar E.N., Optican L.M. & Richmond B.J. (1992 b). Role of inferior temporal neurons in visual memory II. Multiplying temporal waveforms related to vision and memory. Journal of Neurophysiology 68, 12961306.
Fahy F.L., Riches I.P. & Brown M.W. (1993). Neuronal activity related to visual recognition memory: Long-term memory and the encoding of recency and familiarity information in the primate anterior and medial inferior temporal and rhinal cortex. Experimental Brain Research 96, 457472.
Fuster J.M. & Jervey J.P. (1981). Inferotemporal neurons distinguish and retain behaviorally relevant features of visual stimuli. Science 212, 952955.
Gross C.G., Bender D.B. & Gerstein G.L. (1979). Activity of inferior temporal neurons in behaving monkeys. Neuropsychologia 17, 215229.
Gross C.G., Rocha-Miranda C.E. & Bender D.B. (1972). Visual properties in inferotemporal cortex of the macaque. Journal of Neurophysiology 35, 96111.
Li L., Miller E.A. & Desimone R. (1993). The representation of stimulus familiarity in anterior inferior temporal cortex. Journal of Neurophysiology 69, 112.
Mikami A. & Kubota K. (1980). Inferotemporal neurons activities and color discrimination with delay. Brain Research 182, 6578.
Miller E.K. & Desimone R. (1994). Parallel neuronal mechanisms for short-term memory. Science 263, 520523.
Miller E.K., Li L. & Desimone R. (1991). A neural mechanism for working and recognition memory in inferior temporal cortex. Science 254, 13771379.
Miller E.K., Li L. & Desimone R. (1993). Activity in anterior inferior temporal cortex during a short-term memory task. Journal of Neuroscience 13, 14601478.
Mishkin M. (1982). A memory system in the monkey. Philosophical Transactions of the Royal Society London (Biology) 298, 8395.
Miyashita Y. & Chang H.S. (1988). Neuronal correlate of pictorial short-term memory in the primate visual cortex. Nature 331, 6870.
Riches I.P., Wilson F.A.W. & Brown M.W. (1991). The effects of visual stimulation and memory on neurons of the hippocampal formation and the neighboring parahippocampal gyrus and inferior temporal cortex of the primate. Journal of Neuroscience 11, 17631779.
Sary G.Y., Vogels R. & Orban G.A. (1993). Cue-invariant shape selectivity of macaque inferior temporal neurons. Science 260, 995997.
Tanaka K., Saito H., Fukuda Y. & Moriya M. (1991). Coding visual images of objects in the inferotemporal cortex of the Macaque monkey. Journal of Neurophysiology 66, 170189.
Ungerleider L.G. & Mishkin M. (1982). Two cortical visual systems. In Analysis of Visual Behavior, ed. Ingle D.J., Goodale M.A. & Mansfield R.J.W., pp. 549586. Cambridge, Massachusetts: MIT Press.
Vogels R. & Orban G.A. (1990). How well do response changes of striate neurons signal differences in orientation: A study in the discriminating monkey. Journal of Neuroscience 10, 35433558.
Vogels R. & Orban G.A. (1994). Activity of inferior temporal neurons during orientation discrimination with successively presented gratings. Journal of Neurophysiology 71, 14281451.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Visual Neuroscience
  • ISSN: 0952-5238
  • EISSN: 1469-8714
  • URL: /core/journals/visual-neuroscience
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords:

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 3 *
Loading metrics...

Abstract views

Total abstract views: 114 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 20th November 2017. This data will be updated every 24 hours.