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Electrophysiological evidence for the existence of coarse and fine disparity mechanisms in human


, : Electrophysiological evidence for the existence of coarse and fine disparity mechanisms in human. Vision Research 25(11): 1603-1612

Visual sensitivity to stereoscopic disparity changes was measured both psychophysically and by means of evoked potentials. The binocular disparity of a dynamic random-dot stereogram portraying a single flat plane alternated between two values symmetrical about the plane of fixation. The threshold for disparity alternation of the stereoscopic plane was determined at alternation rates between 4 and 12 depth reversals per second (rps). Evoked potential and forced-choice psychophysical estimates of stereoscopic threshold at each reversal frequency agreed, with a mean discrepancy of only .+-. 0.1 log units. Evoked potential amplitude was a linear function of log disparity up to about 15 arc min peak to peak disparity. For larger disparities, the evoked potential amplitude versus log disparity function was found to be nonmonotonic with a dip occurring at approximately 26 arc min disparity. Responses to fine disparities of less than 20 arc min lay close to one temporal phase while those evoked by coarse disparities greater than 40 arc min lay near a different phase. The data suggest that disparity processing mechanisms either undergo dynamic changes as disparity increases or that processing shifts between at least two independent mechanisms.

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Accession: 005349640

PMID: 3832583

DOI: 10.1016/0042-6989(85)90130-0

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Gruden', M.A.; Poletaev, A.B., 1986: Brain-specific proteins S 100 and reception of neuromediators by membrane preparations from the rat brain. Study on specific binding of ligands of various nervous cell membrane neuromediator receptors revealed that brain-specific proteins S100 modulated in a dose-dependent fashion the level of specific binding. Proteins S100 (but not BSA or blood gamma...

Hilgert, R.L., 1972: The motivation of employees in the dental office. Journal of the Missouri Dental Association 52(4): 16-21

Simon, R.; Durrleman, S.; Hoppe, R.T.; Bonadonna, G.; Bloomfield, C.D.; Rudders, R.A.; Cheson, B.D.; Berard, C.W., 1990: Prognostic factors for patients with diffuse large cell or immunoblastic non-Hodgkin's lymphomas: experience of the non-Hodgkin's Lymphoma Pathologic Classification Project. Prognostic factors for long-term survival of 312 patients with diffuse large cell or immunoblastic non-Hodgkin's lymphoma are presented based on analysis of the multiinstitution clinicopathologic study sponsored by the National Cancer Institu...

Seddon, D., 1988: Personal view. A case of blindness due to ocular Acanthamoeba infection is described by the patient, who contracted the infection while travelling in Ecuador. The patient eventually regained his sight after undergoing corneal graft surgery.

Gallego Valcarce E.; Barettino Fraile D., 1990: Quantitative evaluation system of alternatives in the emplacement of new urban solid waste deposits of Malaga. Boletin Geologico y Minero 101(2): 282-292

Martin, A.P., 2000: Choosing among alternative trees of multigene families. Estimation of gene trees is the first step in testing alternative hypotheses about the evolution of multi-gene families. The standard practice for inferring gene family history is to construct trees that meet some objective criteria based on the f...

P, R., 1990: Face to Face with EMFs. Science 249(4975): 1379-1379

Pohl, J.; Stremmel, W., 1999: Megaloblastic anemia in a psychogenic eating disorder. A 68-year-old woman had progressively lost strength over the past 5 years and become bed-ridden. She reported gradually reducing her diet during the last few years, for the last two years restricting herself to oatmeal, biscuits and water. Acute e...

Fluhrer, R.; Capell, A.; Westmeyer, G.; Willem, M.; Hartung, B.; Condron, M.M.; Teplow, D.B.; Haass, C.; Walter, J., 2002: A non-amyloidogenic function of BACE-2 in the secretory pathway. beta-Site amyloid precursor protein cleavage enzyme (BACE)-1 and BACE-2 are members of a novel family of membrane-bound aspartyl proteases. While BACE-1 is known to cleave beta-amyloid precursor protein (betaAPP) at the beta-secretase site and to...

Price, C.J.; Howard, D.; Patterson, K.; Warburton, E.A.; Friston, K.J.; Frackowiak, S.J., 1998: A functional neuroimaging description of two deep dyslexic patients. Deep dyslexia is a striking reading disorder that results from left-hemisphere brain damage and is characterized by semantic errors in reading single words aloud (e.g., reading 'spirit' as 'whisky'). Two types of explanation fo...