Accession Number:

ADA327400

Title:

Neural Systems Underlying Visual Recognition in Humans.

Descriptive Note:

Progress rept. 30 Sep 94-1 Oct 95,

Corporate Author:

IOWA UNIV IOWA CITY COLL OF MEDICINE

Personal Author(s):

Report Date:

1996-02-01

Pagination or Media Count:

10.0

Abstract:

Recent findings from our laboratory indicate that brain-damaged patients can manifest category-specific defects in the retrieval of conceptual knowledge for concrete entities. For example, patients may lose the ability to recognize many animals, but remain entirely normal in their ability to recognize tools or the reverse may occur. These findings raise interesting questions about the mechanisms of knowledge retrieval defects. It has been suggested, for example, that category-related recognition defects are attributable to the origin of the entities, in terms of whether they are natural animate, living or artifactual manufactured, inanimate, nonliving e.g., Warrington Shallice, 1984. This account has been challenged by those who have seen these defects as a reflection of factors such as familiarity, frequency, and prototypicality e.g., Farah et al., 1991 Funnell Sheridan, 1992 Stewart et al., 1992 or as a reflection of the underlying difficulty that makes some entities inherently harder to recognize e.g., Capitani et al., 1994.

Subject Categories:

  • Anatomy and Physiology
  • Medicine and Medical Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE