geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The relative contributions of binocular and monocular depth cues to the control of goal - directed reaching movements


, : The relative contributions of binocular and monocular depth cues to the control of goal - directed reaching movements. Society for Neuroscience Abstract Viewer & Itinerary Planner : Abstract No 14 9

Using the movement kinematics for a simple object placement task, we have estimated the time-varying weights that subjects give to binocular and monocular cues to 3D surface orientation when planning and guiding a simple goal-directed hand movement. Subjects viewed a textured disk in a 3D virtual environment with full binocular vision. They were asked to move a cylinder from a starting platform and to place it flush onto the target surface. An optical tracking system was used to measure the position and orientation of the cylinder in real-time. The moving cylinder was rendered in the virtual display in alignment with the cylinder actually being moved by subjects. On each trial, a real target surface, invisible to subjects, was positioned and oriented in alignment with the virtual target surface by a robot arm. Target surfaces at a range of slants (from 16degree to 44degree away from the fronto-parallel) were presented randomly from trial-to-trial. On half of the trials, the binocular cues (disparity) and monocular cues (outline shape and texture) were made to suggest slightly different slants. We correlated the orientation trajectories of cylinders on the cue-conflict trials with the slants suggested by each set of cues to derive time varying weight functions that measured the relative contributions of the two types of cue to subjects' motor behavior. At low target slants (20degree), subjects' orienting movements depended most strongly on binocular cues (5:1 weight ratio), while at medium slants (40degree), they depended most strongly on monocular cues (3:1 weight ratio). The weights did not change significantly as a function of time and were the same regardless of whether or not the moving cylinder was visible. The results are similar to those found in perceptual tasks using textured, slanted surfaces, though the weights given to the monocular cues at medium slants found here are larger than any found in the perceptual literature to date.

US$29.90


Other references

Parida, S.; Singh, T.U.; Thangamalai, R.; Narasimha Reddy, C.E.; Panigrahi, M.; Kandasamy, K.; Singh, V.; Mishra, S.K., 2015: Daidzein pretreatment improves survival in mouse model of sepsis. The aim of the present study was to assess the effect of seven days daidzein pretreatment in cecal ligation and puncture (CLP) model of sepsis. We assessed the survival benefit of daidzein and its effect on lung injury in CLP-induced sepsis in mic...

Ono; Watari; Ando; Fujita; Hirokura; Ida; Kako; Kawahata; Kawasumi; Matsuoka; Nishizawa; Noda; Ogawa; Ohkubo; Okamoto; Soto; Tanahashi; Taniguchi; Tetsuka; Toi; Yamazaki, 1985: Ion-Bernstein-wave heating in the JIPPT-II-U tokamak plasma. Physical Review Letters 54(21): 2339-2342

Yokogawa, S., 1926: On Ascariasis and the Life-History of Ascaris. Taiwan Igakkai Zasshi, 1923(No. 229

Renganathan, V.; Brenner, M., 2000: Enzymatic process for the production of cephalosporins. An enzymatic process for hydrolyzing the 7-position acyl ester of certain cephalosporin compounds to the corresponding alcohol is disclosed.

Roberts, C.; Price, G.W.; Jones, B.J.; Middlemiss, D.N.; Gaster, L.; Routledge, C., 1997: Importance of 5-HT-1B selectivity for 5-HT terminal autoreceptor activity An in vivo microdialysis study in the freely-moving guinea-pig. British Journal of Pharmacology 120(PROC SUPPL ): 140P

Barra, V.; Schillaci, T.; Lentini, L.; Costa, G.; D.L.onardo, A., 2012: Bypass of cell cycle arrest induced by transient DNMT1 post-transcriptional silencing triggers aneuploidy in human cells. Aneuploidy has been acknowledged as a major source of genomic instability in cancer, and it is often considered the result of chromosome segregation errors including those caused by defects in genes controlling the mitotic spindle assembly, centro...

Hindman, H.B.; Knox, W.E., 1978: Guanase ec 3.5.4.3 in reticulocytes and other rat tissues. A sensitive and precise assay of guanase [EC 3.5.4.3] was based on the conversion of 14C-guanine to uric acid in the presence of excess xanthine oxidase. The enzyme was entirely soluble in rat tissues and no enzyme inhibitors were detected. The mo...

Schardt B.C.; Hollander F.J.; Hill C.L., 1982: Isolation purification and characterization of high valent complexes from a manganese porphyrin based catalytic hydro carbon activation system crystal and molecular structure of mu oxobisazidotetraphenylporphinato manganese iv. High-valent complexes were isolated from the reactions of (tetraphenylporphinato)manganese(III) derivatives, XMnIIITPP [possible cytochrome P-450 models], with iodosylbenzene in hydrocarbon or halocarbon solvents. When X = N3- or OCN-, dimeric .mu...

Hikiji, Kogoro, 1933: Zur Anatomie des Bodens der Rautengrube beim Neugeborenen. By means of wax models of the medulla of the newborn, made from serial sections stained with Nissl's method, the various sulci and the corresponding columns of the medulla are described and compared with those of the adult. In the middle of t...

Scherz, N.; Méan, M.; Limacher, A.; Righini, M.; Jaeger, K.; Beer, H-J.; Frauchiger, B.; Osterwalder, J.; Kucher, N.; Matter, C.M.; Banyai, M.; Angelillo-Scherrer, A.; Lämmle, B.; Husmann, M.; Egloff, M.; Aschwanden, M.; Bounameaux, H.; Cornuz, J.; Rodondi, N.; Aujesky, D., 2013: Prospective, multicenter validation of prediction scores for major bleeding in elderly patients with venous thromboembolism. The Outpatient Bleeding Risk Index (OBRI) and the Kuijer, RIETE, and Kearon scores are clinical prognostic scores for bleeding in patients receiving oral anticoagulants for venous thromboembolism (VTE). We prospectively compared the performance of...