Hemispace-VHF compatibility

Bowers, Dawn; Heilman, Kenneth M.; Abell, Thomas Van Den

doi:10.1016/0028-3932(81)90087-7

Cited by 48 publications

(11 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If neglect subjects suffer from the inability to disengage attention from their right hemifield (Posner, Walker, Friedrich, & Rafal, 1984), are they also unable to disengage attention from the right side of (selected) objects? Is this inability found both for objects placed in their right or their left hemifields (Rapcsak, Varfaellie, Fleet, & Heilman, 1989;Bisiach, Luzatti, & Perani, 1981;Bowers, Leilman, & Van den Abel, 1981)? By using an array of elements as an ''object,'' we demonstrate that neglect subjects automatically select the object if it is in their right hemifield and have difficulty selecting it if it is in their left.…”

Section: Discussionmentioning

confidence: 98%

Searching with Unilateral Neglect

Pavlovskaya

Ring

Groswasser

et al. 2002

Journal of Cognitive Neuroscience

View full text Add to dashboard Cite

We address two longstanding conflicts in the visual search and unilateral neglect literature by studying feature and conjunction search performance of neglect patients using laterally presented search arrays. The first issue relates to whether feature search is performed independently of attention, or rather requires "spread attention." If feature search is "preattentive," it should survive neglect. However, we find neglect effects for both feature and conjunction search, suggesting that feature search, too, has an attentional requirement. The second controversy refers to the space- or object-based nature of neglect following unilateral right-hemisphere parietal lobe damage. If neglect were a purely spatial phenomenon, then we would expect no detriment in performance in the right (nonneglect) field, and diminished performance for the whole left (neglect) field. On the other hand, if neglect were purely object-based, we would expect diminished performance on the left side of the search array, irrespective of its location in the visual field. We now demonstrate a combination of strong object-based and space-based neglect effects for conjunction search with laterally placed element arrays, suggesting that these two mechanisms work in tandem.

show abstract

Section: Discussionmentioning

confidence: 98%

Searching with Unilateral Neglect

Pavlovskaya

Ring

Groswasser

et al. 2002

Journal of Cognitive Neuroscience

View full text Add to dashboard Cite

show abstract

“…Thus when subjects' heads are tilted, report accuracy in the visual modality may depend as much upon the locations of letter stimuli in gravitational coordinates as upon their retinal loci to left or right of fixation (Corballis et al 1978). Bowers et al (1981) manipulated gaze direction to left or right so as to unconfound visual field and the side of hemispace within which a visual field normally falls with straight ahead fixation. Performance tended to be faster when visual field was aligned with a compatible side of hemispace.…”

Section: Introductionmentioning

confidence: 99%

Head and Body Hemispace to Left and Right III: Vibrotactile Stimulation and Sensory and Motor Components

et al. 1983

View full text Add to dashboard Cite

Response latencies were measured to vibrotactile stimulation delivered to the forefingers of the left or right hands which were positioned ipsilaterally or contralaterally (across the midline) in left or right hemispace. While the two hands did not differ in speed of response, either hand performed better when located in right hemispace (experiment 1). This effect was greatly reduced, though not eliminated, with 90 degrees lateral head turn, when performance was better with stimulation and responding in right-of-head hemispace, but not right-of-body hemispace (experiment 2). When different hands received stimulation and initiated responses, and were located in either the same or opposite hemispace, right-hemispace superiority was found to be motor rather than sensory (experiment 3). These findings are discussed in the context of the true and the phenomenological midline and the clinical syndrome of hemineglect.

show abstract

“…The direct effects of activation have been demonstrated by changes in cerebral blood flow (Malamed & Larsen, 1977). Lateral orientation of visual attention has altered receptivity in the ipsilateral visual field (Bowers , Heilman , & Van Den Abell, 1981;Hughes & Zimba, 1985) and increased crossmodal sensitivity on the same side in other senses (Hiscock, Hampson, Wong, & Kinsbourne , 1985;Honore, 1982). This method has also been used effectively to produce other cognitive and emotional behaviors in accord with the hemisphere that is more activated (Gross , Franko, & Lewin, 1978;Merckelbach & van Oppen, 1987;Tressoldi, 1987;Walker, Wade, & Waldman, 1982).…”

mentioning

confidence: 99%

Cognitive style induced by hemisphere priming: Consistent versus inconsistent self-report

Drake

1988

Bull. Psychon. Soc.

View full text Add to dashboard Cite

The method of induced lateral orientation of attention was used to selectively activate the right or left hemisphere in order to observe the consistency of behavior under each manipulated condition. Previous research has shown significantly lower consistency of behavior during relative right-than during relative left-hemisphere activation. With normal, right-handed, intact subjects this effect was replicated and extended to personality measures. These findings are discussed with respect to (1) the dynamics of selective activation of cortical regions, and (2) localization of complementary cognitive processes. Cacioppo, Petty, and Quintanar (1982, Experiment 2) found that when students listened to persuasive arguments, they reported greater attention to statements consistent with their own attitudes when EEG measures indicated a preponderance of activation in the left hemisphere, but greater attention to statements inconsistent with their attitudes during relative right cerebral hemisphere activation. Attempts to verify this apparent complementarity of processing strategies have shown analogous effects for selective memory (Drake , 1987a) and selective discounting (Drake, 1987b) .Further evidence that the left hemisphere may be especially involved in consistency comes from the research of Seamon, Brody, and Kauff (1983), who studied the effects of frequency of exposure to geometric figures on subjects' ratings of frequency and preference for those figures . They found that when the figures were exposed directly to the right hemisphere by tachistoscopic presentation in the left visual field, the ratings of frequency increased with greater exposure, but preference did not. When presentation was directed to the left hemisphere, however, both ratings of frequency and preference increased as a direct function of exposure, and were consistent with each other.This phenomenon has been demonstrated in three additional studies, using manipulated lateral orientation of attention as a means of producing selective activation of the processes of one hemisphere. When Drake (1984) measured perceived familiarity of and liking for famous persons, the correlation between these two measures wasThe assistance of Loretta Drake and Tracey Daily in the data collection is gratefully acknowledged. The contribution of the latter was supported by a graduate assistantshipfrom the State of Colorado. Preparation of this paperwas supported in part by a Research Opportunity Award to the author by the National Science Foundation, under Grant BNS 84-06809 to Charles M. Judd. Correspondence concerning this research may be directed to Roger A. Drake, who is now at the Department of Biomedical Engineering,The Johns HopkinsUniversitySchool of Medicine, 720 Rutland Avenue, 522 Traylor Building, Baltimore, MD 21205. significantly greater during left-than during righthemisphere activation. The same pattern of results was found for measures of attitude extremity and importance by Drake and John (1987) . Drake and Sobrero (1987) measured their subjects...

show abstract

Hemispace-VHF compatibility

Cited by 48 publications

References 20 publications

Searching with Unilateral Neglect

Searching with Unilateral Neglect

Head and Body Hemispace to Left and Right III: Vibrotactile Stimulation and Sensory and Motor Components

Cognitive style induced by hemisphere priming: Consistent versus inconsistent self-report

Contact Info

Product

Resources

About