Neuromagnetic brain responses during 3D object perception from 2D optic flow

Iwaki, Sunao; Bonmassar, Giorgio; Belliveau, John W.

doi:10.1016/j.ics.2006.12.075

Cited by 4 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Beer et al (2009) also observed a 3D SFM activation in the human STS. The timing of the activation in the various regions has been revealed by magnetoencephalography (MEG) experiments (Iwaki et al 2007, Jiang et al 2008. To control for motion in 3D space present in the rotating RL stimuli, we performed an additional experiment whereby subjects attended to either the 3D shape or the 3D motion, thereby confirming the involvement of hMT/V5+ in the processing of 3D shape (Peuskens et al 2004).…”

Section: Other Human Fmri Studiesmentioning

confidence: 68%

The Extraction of 3D Shape in the Visual System of Human and Nonhuman Primates

Orban

2011

Annu. Rev. Neurosci.

119

102

View full text Add to dashboard Cite

Depth structure, the third dimension of object shape, is extracted from disparity, motion, texture, and shading in the optic array. Gradient-selective neurons play a key role in this process. Such neurons occur in CIP, AIP, TEs, and F5 (for first- or second-order disparity gradients), in MT/V5, in FST (for speed gradients), and in CIP and TEs (for texture gradients). Most of these regions are activated during magnetic resonance scanning in alert monkeys by comparing 3D conditions with the 2D controls for the different cues. Similarities in activation patterns of monkeys and humans tested with identical paradigms suggest that like gradient-selective neurons are found in corresponding human cortical areas. This view gains credence as the homologies between such areas become more evident. Furthermore, 3D shape-processing networks are similar in the two species, with the exception of the greater involvement of human posterior parietal cortex in the extraction of 3D shape from motion. Thus we can begin to understand how depth structure is extracted from motion, disparity, and texture in the primate brain, but the extraction of depth structure from shading and that of wire-like objects requires further scrutiny.

show abstract

Section: Other Human Fmri Studiesmentioning

confidence: 68%

The Extraction of 3D Shape in the Visual System of Human and Nonhuman Primates

Orban

2011

Annu. Rev. Neurosci.

119

102

View full text Add to dashboard Cite

show abstract

“…14,18,20,23,31,32 In sum, there is now considerable evidence that both ventral and dorsal areas contribute to the percept form from coherent patterns of motion in random dot displays. 23,[32][33][34] One hypothesis is that 3-D shape perception depends on the integration of global motion processing, which is mediated by dorsal areas and shape recognition processing, which is mediated by ventral areas. 34 Despite the importance of motion-carried information to object perception and a wealth of information about the cortical areas that support SFM processing in the adult, we have no information about the functional development of these cortical areas in the human infant.…”

Section: Cortical Basis Of Shape-from-motion Processing In the Adult mentioning

confidence: 99%

Cortical responses to shape-from-motion stimuli in the infant

2017

View full text Add to dashboard Cite

Our ability to extract three-dimensional (3-D) object structure from motion-carried information is a basic visual capacity that is fundamental to object perception. Despite a rich body of behavioral work demonstrating that infants are sensitive to motion-carried information from the early months of life, little is known about the cortical networks that support infants' use of motion-carried information to extract 3-D object structure. This study assessed patterns of cortical activation in infants aged 4 to 6 months as they viewed two types of visual stimuli: (a) shape-from-motion (SFM) displays, where coherent motion of randomly distributed dots gave rise to the percept of 3-D shape and (b) random motion (RM) displays, where dots' motions lacked a coherent structure and gave rise to the percept of randomly moving dots. Functional near-infrared spectroscopy was used to assess activation in occipital, inferior parietal, and posterior temporal cortex. The optical imaging data revealed differential responding to SFM and RM in lower level object processing areas than typically observed in the adult. Possible explanations for this pattern of results are considered.

show abstract

Electrophysiological evidence of separate pathways for the perception of depth and 3D objects

Gao

Cao

et al. 2015

International Journal of Psychophysiology

View full text Add to dashboard Cite

Neuromagnetic brain responses during 3D object perception from 2D optic flow

Cited by 4 publications

References 15 publications

The Extraction of 3D Shape in the Visual System of Human and Nonhuman Primates

The Extraction of 3D Shape in the Visual System of Human and Nonhuman Primates

Cortical responses to shape-from-motion stimuli in the infant

Electrophysiological evidence of separate pathways for the perception of depth and 3D objects

Contact Info

Product

Resources

About