Complex objects are represented in macaque inferotemporal cortex by the combination of feature columns. K, Y.&nbsp;Y<nbsp>T. & M, T.&nbsp;M.<nbsp>N. Nature Neuroscience, 4(8):832-8, Aug, 2001.
abstract   bibtex   
Laboratory for Integrative Neural Systems, Brain Science Institute, The Institute of Physical and Chemical Research (RIKEN), Hirosawa 2-1, Wako-shi, Saitama 351-0198, Japan. Intrinsic signal imaging from inferotemporal (IT) cortex, a visual area essential for object perception and recognition, revealed that visually presented objects activated patches in a distributed manner. When visual features of these objects were partially removed, the simplified stimuli activated only a subset of the patches elicited by the originals. This result, in conjunction with extracellular recording, suggests that an object is represented by a combination of cortical columns, each of which represents a visual feature (feature column). Simplification of an object occasionally caused the appearance of columns that were not active when viewing the more complex form. Thus, not all the columns related to a particular feature were necessarily activated by the original objects. Taken together, these results suggest that objects may be represented not only by simply combining feature columns but also by using a variety of combinations of active and inactive columns for individual features.
@article{ Tsunoda_etal01,
  author = {Tsunoda K, Yamane Y, Nishizaki M, Tanifuji M.},
  title = {Complex objects are represented in macaque inferotemporal cortex
	by the combination of feature columns},
  journal = {Nature Neuroscience},
  year = {2001},
  volume = {4},
  pages = {832-8},
  number = {8},
  month = {Aug},
  abstract = {Laboratory for Integrative Neural Systems, Brain Science Institute,
	The Institute of Physical and Chemical Research (RIKEN), Hirosawa
	2-1, Wako-shi, Saitama 351-0198, Japan. Intrinsic signal imaging
	from inferotemporal (IT) cortex, a visual area essential for object
	perception and recognition, revealed that visually presented objects
	activated patches in a distributed manner. When visual features of
	these objects were partially removed, the simplified stimuli activated
	only a subset of the patches elicited by the originals. This result,
	in conjunction with extracellular recording, suggests that an object
	is represented by a combination of cortical columns, each of which
	represents a visual feature (feature column). Simplification of an
	object occasionally caused the appearance of columns that were not
	active when viewing the more complex form. Thus, not all the columns
	related to a particular feature were necessarily activated by the
	original objects. Taken together, these results suggest that objects
	may be represented not only by simply combining feature columns but
	also by using a variety of combinations of active and inactive columns
	for individual features.},
  en_number = {3.6.10:36}
}

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