Blindsight in hemispherectomized patients as revealed by spatial summation across the vertical meridian

Brain

Volumn 120, Issue 5, 1997, Pages 795-803

  Tomaiuolo, F ^a   Ptito, M ^c,d   Marzi, C A ^b   Paus, T ^c   Ptito, A ^c  

^a UNIVERSITY OF PISA   (Italy)

^b UNIVERSITY OF VERONA   (Italy)

^c MCGILL UNIVERSITY   (Canada)

^d UNIVERSITÉ DE MONTRÉAL   (Canada)

Author keywords

Blindsight; Hemispherectomy; Reaction time; Spatial summation

Indexed keywords

ADULT; ARTICLE; CASE REPORT; CEREBRAL BLINDNESS; CLINICAL FEATURE; COMPUTER ASSISTED TOMOGRAPHY; CONTROLLED STUDY; FEMALE; HEMISPHERECTOMY; HUMAN; MALE; NUCLEAR MAGNETIC RESONANCE IMAGING; PRIORITY JOURNAL; REACTION TIME; SPATIAL SUMMATION; VISION;

EID: 0030919337     PISSN: 00068950     EISSN: None     Source Type: Journal    
DOI: 10.1093/brain/120.5.795     Document Type: Article

References (51)

1. Barbur JL, Watson JDG, Frackowiak RSJ, Zeki S. Conscious visual perception without V1. Brain 1993; 116: 1293-302.
2. Blythe I M, Kennard C, Ruddock KH. Residual vision in patients with retrogeniculate lesions of the visual pathways. Brain 1987; 110: 887-905.
3. Braddick O, Atkinson J, Hood B, Harkness W, Jackson G, Vargha-Khadem F. Possible blindsight in infants lacking one cerebral hemisphere. Nature 1992; 360: 461-3.
4. Campion J, Latto R, Smith YM. Is blindsight an effect of scattered light, spared cortex, and near-threshold vision? Behav Brain Sci 1983; 6: 423-86.
5. Celesia GG, Bushnell D, Toleikis SC, Brigell MG. Cortical blindness and residual vision: is the 'second' visual system in humans capable of more than rudimentary visual perception? Neurology 1991; 41: 862-9.
6. Corbetta M, Marzi CA, Tassinari G, Aglioti S. Effectiveness of different task paradigms in revealing blindsight. Brain 1990; 113: 603-16.
7. Cowey A, Stoerig P. The neurobiology of blindsight. [Review]. Trends Neurosci 1991; 14: 140-5.
8. Faubert J, Diaconu V, Ptito M, Ptito A. Modeling visual scatter in the human eye: implication for residual vision [abstract]. Inv Ophthalmol Vis Sci 1995; 36 (ARVO Suppl): S633.
9. Fendrich R, Wessinger CM, Gazzaniga MS. Residual vision in a scotoma: implications for blindsight [see comments]. Science 1992; 258: 1489-91. Comment in: Science 1992; 258: 1438-9, Comment in: Science 1993; 261: 493-4.
10. Fendrich R, Wessinger CM, Gazzaniga MS. Residual vision in a scotoma: implications for blindsight [see comments]. Science 1992; 258: 1489-91. Comment in: Science 1992; 258: 1438-9, Comment in: Science 1993; 261: 493-4.
11. Fendrich R, Wessinger CM, Gazzaniga MS. Residual vision in a scotoma: implications for blindsight [see comments]. Science 1992; 258: 1489-91. Comment in: Science 1992; 258: 1438-9, Comment in: Science 1993; 261: 493-4.
12. Fendrich R, Wessinger CM, Gazzaniga MS. Response to 'Sources of Blindsight'. Science 1993; 261: 494-5.
13. Holmes G. Disturbances of vision by cerebral lesions. Brit J Ophthalmol 1918; 2: 353-84.
14. Kasten E, Wust S, Sabel BA. Stability and variability of visual field deficits in brain damaged patients [abstract]. Soc Neurosci Abstr 1995; 21: 1652.
15. King SM, Azzopardi, P, Cowey A, Oxbury J, Oxbury S. The role of light scatter in the residual visual sensitivity of patients with complete cerebral hemispherectomy. Vis Neurosci 1996a; 13: 1-13.
16. King SM, Frey S, Villemure JG, Ptito A, Azzopardi P. Perception of motion-in-depth in patients with partial or complete cerebral hemispherectomy. Behav Brain Res 1996b; 76:169-80.
17. Marzi CA, Tassinari G, Aglioti S, Lutzemberger L. Spatial summation across the vertical meridian in hemianopics: a test of blindsight. Neuropsychologia 1986; 24: 749-58.
18. Marzi CA, Smania N, Martini MC, Gambina G, Tomelleri G, Palamara A, et al. Implicit redundant-targets effect in visual extinction. Neuropsychologia 1996; 34: 9-22.
19. Marzi CA, Fanini A, Girelli M, Ipata AE, Miniussi C, Prior M, et al. Is extinction following parietal damage an interemispheric disconnection phenomenon? In: Thier P, Karnath H-O, editors. Parietal lobe contribution to orientation in 3D-space. Stuttgart: Springer-Verlag, (1997). In press.
20. Miller J. Divided attention: evidence for coactivation with redundant signals. Cognit Psychol 1982; 14: 247-79.
21. Miniussi C, Girelli M, Ipata AE, Marzi CA. Electrophysiological correlates of the redundant target effect [abstract]. Eur J Neurosci 1996; Suppl 9: 102.
22. Mohler CW, Wurtz RH. Role of striate cortex and superior colliculus in visual guidance of saccadic eye movements in monkeys. J Neurophysiol 1977; 40: 74-94.
23. Mordkoff JT, Miller J, Roch A-C. Absence of coactivation in the motor component: evidence from psychophysiological measures of target detection. J Exp Psychol Hum Percept Perform 1996; 22: 25-41.
24. Perenin MT. Visual function within the hemianopic field following early cerebral hemidecortication in man. II. Pattern discrimination. Neuropsychologia 1978; 16: 696-708.
25. Perenin MT, Jeannerod M. Residual vision in cortically blind hemifields. Neuropsychologia 1975; 13: 1-7.
26. Perenin MT, Jeannerod M. Visual function within the hemianopic field following early cerebral hemidecortication in man. I. Spatial localization. Neuropsychologia 1978; 16: 1-13.
27. Pizzamiglio L, Antonucci G, Francia A. Response of the cortically blind hemifields to a moving visual scene. Cortex 1984; 20: 89-99.
28. Poppel E, Held R, Frost D. Residual visual function after brain wounds involving the central visual pathways in man [letter]. Nature 1973; 243: 295-6.
29. Pöppel E, Richards W. Light sensitivity in cortical scotomata contralateral to small islands of blindness. Exp Brain Res 1974; 21: 125-30.
30. Ptito A, Lepore F, Ptito M, Lassonde M. Target detection and movement discrimination in the blind field of hemispherectomized patients. Brain 1991; 114: 497-512.
31. Ptito M, Herbin M, Boire D, Ptito A. Neural basis of residual vision in hemicorticectomized monkeys. Progress in Brain Res 1996; 112: 385-404.
32. Raab D. Statistical facilitation of simple reaction time. Trans NY Acad Sci 1962; 43: 574-90.
33. Rafal R, Smith J, Krantz J, Cohen A, Brennan C. Extrageniculate vision in hemianopic humans: saccade inhibition by signals in the blind field. Science 1990; 250: 118-21.
34. Ratcliff R. Group reaction time distributions and an analysis of distribution statistics. Psychol Bull 1979; 86: 446-61.
35. Reuter-Lorenz PA, Nozawa G, Gazzaniga MS, Hughes HC. Fate of neglected targets: a chronometric analysis of redundant target effects in the bisected brain. J Exp Psychol Hum Percept Perform 1995; 21: 211-30.
36. Schiller PH. The role of the monkey superior colliculus in eye movement and vision. Invest Ophthalmol 1972; 11: 451-60.
37. Singer W, Zihl J, Pöppel E. Subcortical control of visual thresholds in humans: evidence for modality specific and retinotopically organized mechanisms of selective attention. Exp Brain Res 1977; 29: 173-90.
38. Stoerig P. Chromaticity and achromaticity: evidence for a functional differentiation in visual field defects. Brain 1987; 110: 869-86.
39. Stoerig P, Cowey A. Wavelength discrimination in blindsight. Brain 1992; 115: 425-44.
40. Stoerig P, Cowey A. Blindsight: neurons and behaviour. [Review]. Progress Brain Res 1993; 95: 445-59.
41. Stoerig P, Hübner M, Pöppel E. Signal detection analysis of residual vision in a field defect due to a post-geniculate lesion. Neuropsychologia 1985; 23: 589-99.
42. Torjussen T. Residual function in cortically blind hemifields. Scand J Psychol 1976; 17: 320-3.
43. Torjussen T. Visual processing in cortically blind hemifields. Neuropsychologia 1978; 16: 15-21.
44. Ueki K. Hemispherectomy in the human with special reference to the preservation of function. Prog Brain Res 1966; 21: 285-338.
45. Wada J, Rasmussen T. Intracarotid injection of sodium amytal for the lateralization of cerebral speech dominance: experimental and clinical observations. J Neurosurg 1960; 17: 266-82.
46. Weiskrantz L. Varieties of residual experience. Q J Exp Psychol 1980; 32: 365-386.
47. Weiskrantz L. Blindsight: a case study and implications. Oxford: Clarendon Press, 1986.
48. Weiskrantz L. Residual vision in a scotoma. A follow-up study of 'form' discrimination. Brain 1987; 110: 77-92.
49. Weiskrantz L, Warrington EK, Sanders MD, Marshall J. Visual capacity in the hemianopic field following a restricted occipital ablation. Brain 1974; 97: 709-28.
50. Wessinger CM, Fendrich R, Ptito A, Villemure JG, Gazzaniga MS. Residual vision with awareness in the field contralateral to a partial or complete functional hemispherectomy. Neuropsychologia 1996; 34: 1129-37.
51. Zihl J, von Cramon D. Registration of light stimuli in the cortically blind hemifield and its effect on localization. Behav Brain Res 1980; 1: 287-98.