Separate visual pathways for perception and action

Separate visual pathways for perception and action Goodale , Milner

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Separate visual pathways for perception and action 1992 Trends in Neurosciences 10.1016/0166-2236(92)90344-8 Goodale-Milner1992-separate-visual-pathways-for-perception-and Goodale-Milner1992-separate-visual-pathways-for-perception-and.txt, the project's staged copy 980932f9a42324cabe93f1a3ccae513e2c7a710a not-redistributable neuroscience

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0 spans located by searching the stored text for the quote's exact words, allowing any whitespace between them mechanism Quotation withheld because this record is not cleared for redistribution. cortical visual pathways for perception and action Quotation withheld because this record is not cleared for redistribution. review review Quotation withheld because this record is not cleared for redistribution. mechanisms Different output requirements (perceptual identification vs online sensorimotor transformation) demand different visual computations, and this drives the anatomical segregation of the two streams. Quotation withheld because this record is not cleared for redistribution. mechanisms Dorsal-stream processing proceeds without reaching consciousness, which keeps moment-to-moment viewer-centred information from disrupting the perceptual constancies computed in the ventral stream. Quotation withheld because this record is not cleared for redistribution. mechanisms Separate processing modules evolved because vision is put to functionally different uses. Quotation withheld because this record is not cleared for redistribution. The proposed division of labour between the two streams is not claimed to be absolute. Quotation withheld because this record is not cleared for redistribution. Correlating human neuropsychological findings with monkey neurophysiology requires caution. Quotation withheld because this record is not cleared for redistribution. The evidence base lacks detailed analyses of how task-specific most visuospatial disorders are. Quotation withheld because this record is not cleared for redistribution. The paper replaces the principle by which the same two pathways are divided. what this limits: any comparison between findings filed under the two accounts: the authors propose that the what-versus-how distinction, rather than the distinction between object vision and spatial vision, captures the functional dichotomy between the ventral and dorsal projections Quotation withheld because this record is not cleared for redistribution. An earlier term is criticised by name for grouping behaviours it could not separate. what this limits: any use of the earlier localization account: the authors state that the notion of localization failed to distinguish between the many different patterns of behaviour that vary with the spatial location of visual stimuli, only some of which rely on tectal mechanisms Quotation withheld because this record is not cleared for redistribution. two control subjects put through the same manual matching task as the patient DF, over a series of randomly ordered trials eliminates: the dissociation being a property of the task rather than of DF's lesion - the controls do the identical task, and the random order removes anticipation for everyone · outcome (stated by the tagger, no quotation): held Quotation withheld because this record is not cleared for redistribution. ventral stream ventral stream Quotation withheld because this record is not cleared for redistribution. dorsal stream dorsal stream Quotation withheld because this record is not cleared for redistribution. localization localization Quotation withheld because this record is not cleared for redistribution. functional dichotomy functional dichotomy Quotation withheld because this record is not cleared for redistribution. tectal mechanisms tectal mechanisms Quotation withheld because this record is not cleared for redistribution. the dorsal/ventral division - THE SAME ANATOMY, A NEW DIVIDING PRINCIPLE: the authors propose that what-versus-how, rather than the object-vision versus spatial-vision distinction, captures the functional dichotomy between the two projections; the fibre bundles are unchanged and the question used to sort them is not, so findings filed under the two accounts sort the same tissue differently Quotation withheld because this record is not cleared for redistribution. localization - A TERM THAT FAILED TO DISTINGUISH: the notion is said not to separate the many different patterns of behaviour that vary with the spatial location of a stimulus, only some of which rely on tectal mechanisms, so one word covered several mechanisms and the paper says so Quotation withheld because this record is not cleared for redistribution. the ventral stream - DEFINED BY WHAT IT IS FOR, NOT BY WHERE IT GOES: proposed to play the major role in the perceptual identification of objects, in the sentence that also names the dorsal stream as the other half of the proposal; the stream is identified here by a function rather than by its anatomical destination Quotation withheld because this record is not cleared for redistribution. extends → Ungerleider and Mishkin's (1982) two-visual-systems model ('what' versus 'where') about this quote: THE STAGED TEXT WAS SPLICED AND HAS BEEN REPAIRED. A page foot - 20 © 1992, Elsevier Science PublishersLtd, (UK) 0166- 2236192150500 TINS, VOI. 15, NO. I, 1992 - sat between 'it is' and 'proposed', inside the sentence, and the quote was cut faithfully from that corrupt copy. So every check we own passed: the offsets were right, the recorded hash of the staged text matched, and the quote was findable. The staged file was repaired rather than only this string, because leaving the corrupt paragraph staged reproduces the fault in the next tag drawn from it; the pre-repair copy is in an internal file and the original quote in evidence as extracted. Quotation withheld because this record is not cleared for redistribution. ventral stream —contrasted-with→ dorsal stream ventral stream dorsal stream strength of the relation: 1 Quotation withheld because this record is not cleared for redistribution. mean mean Quotation withheld because this record is not cleared for redistribution. standard error standard error Quotation withheld because this record is not cleared for redistribution. When reaching to pick up a block, DF's grip aperture changed systematically with the object's width, as in normal subjects. Quotation withheld because this record is not cleared for redistribution. The same patient's manual estimates of object width bore no relation to actual object size and were highly variable trial to trial. Quotation withheld because this record is not cleared for redistribution. The dorsal/ventral division cannot be reduced to the magnocellular/parvocellular retinal division, because both streams receive input from both pathways. Quotation withheld because this record is not cleared for redistribution. Spatial attention is physiologically non-unitary and may be as much associated with the ventral system as with the dorsal. Quotation withheld because this record is not cleared for redistribution. The authors believe functional modularity in cortical visual systems extends from input right through to output. Quotation withheld because this record is not cleared for redistribution. Despite being unable to recognize objects' size, shape and orientation, DF guided her hand and finger movements to those objects accurately. Quotation withheld because this record is not cleared for redistribution. ventral stream ventral stream Quotation withheld because this record is not cleared for redistribution. dorsal stream dorsal stream Quotation withheld because this record is not cleared for redistribution. width of the target width of the target Quotation withheld because this record is not cleared for redistribution. approximately 45 cm — viewing distance at which the plaques were presented in the matching and grasping tasks Quotation withheld because this record is not cleared for redistribution. 5 x 5 cm to 2.5 x 10 cm — range of plaque dimensions used as the stimulus set (all of equal top-surface area) Quotation withheld because this record is not cleared for redistribution.

The full text of this article is not redistributable, so it is not included here. The evidence sentences are withheld with it; the tag layer and its grounding status remain. The article itself is at https://doi.org/10.1016/0166-2236(92)90344-8.