Form Perception

21.

Patterns of activity in the categorical representations of objects.

Object perception has been a subject of extensive fMRI studies in recent years. Yet the nature of the cortical representation of objects in the human brain remains controversial. Analyses of fMRI data have traditionally focused on the activation of ...
Thomas A Carlson, Paul Schrater, Sheng He (J Cogn Neurosci, 200307)
patterns-activity-categorical-representations-objects.asp

22.

The nonindependence of stimulus properties in human category learning.

Typically, models of category learning are verified through behavioral experiments with stimuli consisting of putatively independent dimensions such as shape, size, and color. The assumption of independence is critical in both the design of behavioral ...
Bradley C Love, Arthur B Markman (Mem Cognit, 200307)
nonindependence-stimulus-properties-human-category-learning.asp

23.

Perceptual representation of visible surfaces.

Two experiments are reported in which we examined the ability of observers to identify landmarks on surfaces from different vantage points. In Experiment 1, observers were asked to mark the local maxima and minima of surface depth, whereas in Experiment ...
Flip Phillips, James T Todd, Jan J Koenderink, Astrid M L Kappers (Percept Psychophys, 200307)
perceptual-representation-visible-surfaces.asp

24.

Neural mechanisms of visual object priming: evidence for perceptual and semantic distinctions in fusiform cortex.

Previous functional imaging studies have shown that facilitated processing of a visual object on repeated, relative to initial, presentation (i.e., repetition priming) is associated with reductions in neural activity in multiple regions, including ...
Jon S Simons, Wilma Koutstaal, Steve Prince, Anthony D Wagner, Daniel L Schacter (Neuroimage, 200307)
neural-mechanisms-visual-object-priming-evidence-perceptual-semantic.asp

25.

Cognitive reserve modulates functional brain responses during memory tasks: a PET study in healthy young and elderly subjects.

Cognitive reserve (CR) is the ability of an individual to cope with advancing brain pathology so that he remains free of symptomatology. Epidemiological evidence and in vivo neurometabolic data suggest that CR may be mediated through education or IQ. The ...
Nikolaos Scarmeas, Eric Zarahn, Karen E Anderson, John Hilton, Joseph Flynn, Ronald L Van Heertum, Harold A Sackeim, Yaakov Stern (Neuroimage, 200307)
cognitive-reserve-modulates-functional-brain-responses-memory-tasks.asp

26.

The human temporal lobe integrates facial form and motion: evidence from fMRI and ERP studies.

Physiological studies in humans and monkeys indicate that the posterior temporal cortex is active when viewing the movements of others. Here we tested the premise that this region integrates form and motion information by presenting both natural and ...
Aina Puce, Ari Syngeniotis, James C Thompson, David F Abbott, Kylie J Wheaton, Umberto Castiello (Neuroimage, 200307)
human-temporal-lobe-integrates-facial-form-motion-evidence-fmri-erp.asp

27.

Neural mechanisms of top-down control during spatial and feature attention.

Theories of visual selective attention posit that both spatial location and nonspatial stimulus features (e.g., color) are elementary dimensions on which top-down attentional control mechanisms can selectively influence visual processing. ...
B Giesbrecht, M G Woldorff, A W Song, G R Mangun (Neuroimage, 200307)
neural-mechanisms-top-down-control-spatial-feature-attention.asp

28.

The myth of the visual word form area.

Recent functional imaging studies have referred to a posterior region of the left midfusiform gyrus as the "visual word form area" (VWFA). We review the evidence for this claim and argue that neither the neuropsychological nor neuroimaging data are ...
Cathy J Price, Joseph T Devlin (Neuroimage, 200307)
myth-visual-word-form-area.asp

29.

A fronto-parietal circuit for tactile object discrimination: an event-related fMRI study.

Previous studies of somatosensory object discrimination have been focused on the primary and secondary sensorimotor cortices. However, we expected the prefrontal cortex to also become involved in sequential tactile discrimination on the basis of its role ...
M Cornelia Stoeckel, Bruno Weder, Ferdinand Binkofski, Giovanni Buccino, N Jon Shah, Rüdiger J Seitz (Neuroimage, 200307)
fronto-parietal-circuit-tactile-object-discrimination-event-related.asp

30.

Influence of object shape on responses of human tactile afferents under conditions characteristic of manipulation.

Most objects that we grasp, lift and further manipulate are curved, with curvatures of the same order of magnitude as those of the fingertips. Tactile information pertaining to such gross geometrical features of objects are used in the automatic control ...
Per Jenmalm, Ingvars Birznieks, Antony W Goodwin, Roland S Johansson (Eur J Neurosci, 200307)
influence-object-shape-responses-human-tactile-afferents-under.asp