@article{Johnson2007, title = {Moving to higher ground: The dynamic field theory and the dynamics of visual cognition}, author = {Jeffrey S. Johnson and John P. Spencer and Gregor Schoner}, journal = {New Ideas in Psychology}, year = 2007, abstract = { In the present report, we describe a new dynamic field theory that captures the dynamics of visuo-spatial cognition. This theory grew out of the dynamic systems approach to motor control and development, and is grounded in neural principles. The initial application of dynamic field theory to issues in visuo-spatial cognition extended concepts of the motor approach to decision making in a sensori-motor context, and, more recently, to the dynamics of spatial cognition. Here we extend these concepts still further to address topics in visual cognition, including visual working memory for non-spatial object properties, the processes that underlie change detection, and the ‘binding problem’ in vision. In each case, we demonstrate that the general principles of the dynamic field approach can unify findings in the literature and generate novel predictions. We contend that the application of these concepts to visual cognition avoids the pitfalls of reductionist approaches in cognitive science, and points toward a formal integration of brains, bodies, and behavior. }, biburl = {http://www.bibsonomy.org/bibtex/2abd889321fe501b8181be130419db171/tmalsburg}, keywords = {changedetection dynamicfieldtheory motorcontrol vision workingmemory} } @article{JosephsonHolmes2002, title = {{Visual attention to repeated internet images: testing the scanpath theory on the world wide web}}, author = {Sheree Josephson and Michael E. Holmes}, journal = {Proceedings of the symposium on Eye tracking research \& applications}, pages = {43--49}, publisher = {ACM Press New York, NY, USA}, year = 2002, abstract = {The somewhat controversial and often-discussed theory of visual perception, that of scanpaths, was tested using Web pages as visual stimuli. In 1971, Noton and Stark defined "scanpaths" as repetitive sequences of fixations and saccades that occur upon re-exposure to a visual stimulus, facilitating recognition of that stimulus. Since Internet users are repeatedly exposed to certain visual displays of information, the Web is an ideal stimulus to test this theory. Eye-movement measures were recorded while subjects repeatedly viewed three different kinds of Internet pages -- a portal page, an advertising page and a news story page -- over the course of a week. Scanpaths were compared by using the string-edit methodology that measures resemblance between sequences. Findings show that on the World Wide Web, with somewhat complex visual digital images, some viewers' eye movements may follow a habitually preferred path -- a scanpath -- across the visual display. In addition, strong similarity among eye-path sequences of different viewers may indicate that other forces such as features of the Web site or memory are important.}, biburl = {http://www.bibsonomy.org/bibtex/230af7cf6b221e46de3f6f4eca27900aa/tmalsburg}, keywords = {attention editdistance perception scanpaths vision} } @article{StratfordEtAl1996, title = {Excitatory synaptic inputs to spiny stellate cells in cat visual cortex}, author = {K J Stratford and K Tarczy-Hornoch and K A Martin and N J Bannister and J J Jack}, journal = {Nature}, month = {Jul}, number = 6588, pages = {258-261}, volume = 382, year = 1996, url = {http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&list_uids=8717041&dopt=Citation}, pmid = {8717041}, doi = {10.1038/382258a0}, description = {Excitatory synaptic inputs to spiny stellate cells...[Nature. 1996] - PubMed Result}, abstract = {In layer 4 of cat visual cortex, the monocular, concentric receptive fields of thalamic neurons, which relay retinal input to the cortex, are transformed into 'simple' cortical receptive fields that are binocular and selective for the precise orientation, direction of motion, and size of the visual stimulus. These properties are thought to arise from the pattern of connections from thalamic neurons, although anatomical studies show that most excitatory inputs to layer 4 simple cells are from recurrently connected circuits of cortical neurons. We examined single fibre inputs to spiny stellate neurons. We examined single fibre inputs to spiny stellate neurons in slices of cat visual cortex, and conclude that thalamocortical synapses are powerful and the responses they evoke are unusually invariant for central synapses. However, the responses to intracortical inputs, although less invariant, are strong enough to provide most of the excitation to simple cells in vivo. Our results suggest that the recurrent excitatory circuits of cortex may amplify the initial feedforward thalamic signal, subserving dynamic modifications of the functional properties of cortical neurons.}, biburl = {http://www.bibsonomy.org/bibtex/2c10062af9d4bea60635c0e0ebdb0099b/tmalsburg}, keywords = {-23PDrivingModulating cellular cortex vision} } @article{Nealey:1994:J-Neurosci:8158257, title = {Magnocellular and parvocellular contributions to the responses of neurons in macaque striate cortex}, author = {T A Nealey and J H Maunsell}, journal = {J Neurosci}, month = {Apr}, number = 4, pages = {2069-2079}, volume = 14, year = 1994, url = {http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&list_uids=8158257&dopt=Citation}, doi = {}, pmid = {8158257}, description = {Magnocellular and parvocellular contributions to t...[J Neurosci. 1994] - PubMed Result}, abstract = {Anatomical and physiological studies of the primate visual system have suggested that the signals relayed by the magnocellular and parvocellular subdivisions of the LGN remain segregated in visual cortex. It has been suggested that this segregation may account for the known differences in visual function between the parietal and temporal cortical processing streams in extrastriate visual cortex. To test directly the hypothesis that the temporal stream of processing receives predominantly parvocellular signals, we recorded visual responses from the superficial layers of V1 (striate cortex), which give rise to the temporal stream, while selectively inactivating either the magnocellular or parvocellular subdivisions of the LGN. Inactivation of the parvocellular subdivision reduced neuronal responses in the superficial layers of V1, but the effects of magnocellular blocks were generally as pronounced or slightly stronger. Individual neurons were found to receive contributions from both pathways. We furthermore found no evidence that magnocellular contributions were restricted to either the cytochrome oxidase blobs or interblobs in V1. Instead, magnocellular signals made substantial contributions to responses throughout the superficial layers. Thus, the regions within V1 that constitute the early stages of the temporal processing stream do not appear to contain isolated parvocellular signals. These results argue against a direct mapping of the subcortical magnocellular and parvocellular pathways onto the parietal and temporal streams of processing in cortex.}, biburl = {http://www.bibsonomy.org/bibtex/280420824f3139a8d8aef462d98e95ffc/tmalsburg}, keywords = {-23PDrivingModulating cellular cortex vision} } @article{EngbertKliegl2003, title = {Microsaccades uncover the orientation of covert attention}, author = {Ralf Engbert and Reinhold Kliegl}, journal = {Vision Res}, month = {Apr}, number = 9, pages = {1035-1045}, volume = 43, year = 2003, url = {http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&list_uids=12676246&dopt=Citation}, doi = {}, pmid = {12676246}, description = {Microsaccades uncover the orientation of covert at...[Vision Res. 2003] - PubMed Result}, abstract = {Fixational eye movements are subdivided into tremor, drift, and microsaccades. All three types of miniature eye movements generate small random displacements of the retinal image when viewing a stationary scene. Here we investigate the modulation of microsaccades by shifts of covert attention in a classical spatial cueing paradigm. First, we replicate the suppression of microsaccades with a minimum rate about 150 ms after cue onset. Second, as a new finding we observe microsaccadic enhancement with a maximum rate about 350 ms after presentation of the cue. Third, we find a modulation of the orientation towards the cue direction. These multiple influences of visual attention on microsaccades accentuate their role for visual information processing. Furthermore, our results suggest that microsaccades can be used to map the orientation of visual attention in psychophysical experiments.}, biburl = {http://www.bibsonomy.org/bibtex/2a6ac7fcc4994e695e649edf9b2ba4505/tmalsburg}, keywords = {B_scanpathsimilarity algorithm eyemovements saccades vision} } @article{Bullier2001, title = {Feedback connections and conscious vision}, author = {J Bullier}, journal = {Trends Cogn Sci}, month = {Sep}, number = 9, pages = {369-370}, volume = 5, year = 2001, url = {http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&list_uids=11520692&dopt=Citation}, doi = {}, pmid = {11520692}, description = {Feedback connections and conscious vision. [Trends Cogn Sci. 2001] - PubMed Result}, biburl = {http://www.bibsonomy.org/bibtex/2d9283bee23d5113b1db7466a5c83b5f2/tmalsburg}, keywords = {consciousness feedbackconnections tms vision} } @article{Corbetta1998, title = {A common network of functional areas for attention and eye movements}, author = {M Corbetta and E Akbudak and T E Conturo and A Z Snyder and J M Ollinger and H A Drury and M R Linenweber and S E Petersen and M E Raichle and D C Van Essen and G L Shulman}, journal = {Neuron}, month = {Oct}, number = 4, pages = {761-773}, volume = 21, year = 1998, url = {http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&list_uids=9808463&dopt=Citation}, doi = {}, pmid = {9808463}, description = {A common network of functional areas for attention...[Neuron. 1998] - PubMed Result}, abstract = {Functional magnetic resonance imaging (fMRI) and surface-based representations of brain activity were used to compare the functional anatomy of two tasks, one involving covert shifts of attention to peripheral visual stimuli, the other involving both attentional and saccadic shifts to the same stimuli. Overlapping regional networks in parietal, frontal, and temporal lobes were active in both tasks. This anatomical overlap is consistent with the hypothesis that attentional and oculomotor processes are tightly integrated at the neural level.}, biburl = {http://www.bibsonomy.org/bibtex/2131304ad8223903525eac5d2f5a4c880/tmalsburg}, keywords = {-23PAttention attention braintopology eyemovements feedback fmri vision} } @article{Martínez1999, title = {Involvement of striate and extrastriate visual cortical areas in spatial attention}, author = {A. Martínez and L. Anllo-Vento and M. I. Sereno and L. R. Frank and R. B. Buxton and D. J. Dubowitz and E. C. Wong and H. Hinrichs and H. J. Heinze and S. A. Hillyard}, journal = {Nature Neuroscience}, pages = {364 - 369}, year = 1999, abstract = {We investigated the cortical mechanisms of visual-spatial attention while subjects discriminated patterned targets within distractor arrays. Functional magnetic resonance imaging (fMRI) was used to map the boundaries of retinotopic visual areas and to localize attention-related changes in neural activity within several of those areas, including primary visual (striate) cortex. Event-related potentials (ERPs) and modeling of their neural sources, however, indicated that the initial sensory input to striate cortex at 50−55 milliseconds after the stimulus was not modulated by attention. The earliest facilitation of attended signals was observed in extrastriate visual areas, at 70−75 milliseconds. We hypothesize that the striate cortex modulation found with fMRI may represent a delayed, re-entrant feedback from higher visual areas or a sustained biasing of striate cortical neurons during attention. ERP recordings provide critical temporal information for analyzing the functional neuroanatomy of visual attention.}, biburl = {http://www.bibsonomy.org/bibtex/27a40bd0d9c3abd515602e4611d20891e/tmalsburg}, keywords = {-23PAttention attention ekp feedbackconnections fmri primaryvisualcortex vision} } @article{RovamoEtAl1978, title = {Cortical magnification factor predicts the photopic contrast sensitivity of peripheral vision}, author = {J Rovamo and V Virsu and R Näsänen}, journal = {Nature}, month = {Jan}, number = 5640, pages = {54-56}, volume = 271, year = 1978, url = {http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&list_uids=625324&dopt=Citation}, doi = {}, pmid = {625324}, description = {Cortical magnification factor predicts the photopi...[Nature. 1978] - PubMed Result}, biburl = {http://www.bibsonomy.org/bibtex/275be7ac875374ccc0cde886e658e7529/tmalsburg}, keywords = {B_scanpathsimilarity eye perception primaryvisualcortex psychophysics vision} } @article{CurcioEtAl1990, title = {Human photoreceptor topography}, author = {C. A. Curcio and K. R. Sloan and R. E. Kalina and A. E. Hendrickson}, journal = {Journal of Comparative Neurology}, month = {Feb}, number = 4, pages = {497-523}, volume = 292, year = 1990, url = {http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&list_uids=2324310&dopt=Citation}, pmid = {2324310}, doi = {10.1002/cne.902920402}, description = {Human photoreceptor topography. [J Comp Neurol. 1990] - PubMed Result}, abstract = {We have measured the spatial density of cones and rods in eight whole-mounted human retinas, obtained from seven individuals between 27 and 44 years of age, and constructed maps of photoreceptor density and between-individual variability. The average human retina contains 4.6 million cones (4.08-5.29 million). Peak foveal cone density averages 199,000 cones/mm2 and is highly variable between individuals (100,000-324,000 cones/mm2). The point of highest density may be found in an area as large as 0.032 deg2. Cone density falls steeply with increasing eccentricity and is an order of magnitude lower 1 mm away from the foveal center. Superimposed on this gradient is a streak of high cone density along the horizontal meridian. At equivalent eccentricities, cone density is 40-45% higher in nasal compared to temporal retina and slightly higher in midperipheral inferior compared to superior retina. Cone density also increases slightly in far nasal retina. The average human retina contains 92 million rods (77.9-107.3 million). In the fovea, the average horizontal diameter of the rod-free zone is 0.350 mm (1.25 degrees). Foveal rod density increases most rapidly superiorly and least rapidly nasally. The highest rod densities are located along an elliptical ring at the eccentricity of the optic disk and extending into nasal retina with the point of highest density typically in superior retina (5/6 eyes). Rod densities decrease by 15-25% where the ring crosses the horizontal meridian. Rod density declines slowly from the rod ring to the far periphery and is highest in nasal and superior retina. Individual variability in photoreceptor density differs with retinal region and is similar for both cones and rods. Variability is highest near the fovea, reaches a minimum in the midperiphery, and then increases with eccentricity to the ora serrata. The total number of foveal cones is similar for eyes with widely varying peak cone density, consistent with the idea that the variability reflects differences in the lateral migration of photoreceptors during development. Two fellow eyes had cone and rod numbers within 8% and similar but not identical photoreceptor topography.}, biburl = {http://www.bibsonomy.org/bibtex/29ca2423e68ca46f128261f63352c0cdf/tmalsburg}, keywords = {B_scanpathsimilarity neurobiology perception physiology retina vision} }