Spatial memory enhances the precision of angular self-motion updating

Arthur, Joeanna C.; Philbeck, John W.; Chichka, David

doi:10.1007/s00221-007-1075-0

Cited by 14 publications

(42 citation statements)

References 31 publications

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“…Vision of the environment was provided before each body rotation, but the rotations themselves were administered without vision. The rotations were delivered using a computer-controlled device described elsewhere [78]. The velocity profile was roughly triangular, and consisted of an initial acceleration of 90°/s 2 up to a peak velocity of 54, 81, and 90°/s for the 30°, 75°, and 120° rotations, respectively.…”

Section: Methodsmentioning

confidence: 99%

Medial Temporal Lobe Roles in Human Path Integration

et al. 2014

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Path integration is a process in which observers derive their location by integrating self-motion signals along their locomotion trajectory. Although the medial temporal lobe (MTL) is thought to take part in path integration, the scope of its role for path integration remains unclear. To address this issue, we administered a variety of tasks involving path integration and other related processes to a group of neurosurgical patients whose MTL was unilaterally resected as therapy for epilepsy. These patients were unimpaired relative to neurologically intact controls in many tasks that required integration of various kinds of sensory self-motion information. However, the same patients (especially those who had lesions in the right hemisphere) walked farther than the controls when attempting to walk without vision to a previewed target. Importantly, this task was unique in our test battery in that it allowed participants to form a mental representation of the target location and anticipate their upcoming walking trajectory before they began moving. Thus, these results put forth a new idea that the role of MTL structures for human path integration may stem from their participation in predicting the consequences of one's locomotor actions. The strengths of this new theoretical viewpoint are discussed.

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Section: Methodsmentioning

confidence: 99%

Medial Temporal Lobe Roles in Human Path Integration

et al. 2014

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“…Previous research has shown that visual preview can sometimes facilitate spatial updating in a blind-walking task. 40,41 Our blind subjects showed no consistent preview benefit. This may not be surprising, given that their preview was limited to auditory cues.…”

Section: Discussionmentioning

confidence: 62%

Indoor Spatial Updating With Impaired Vision

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Granquist

Baek

et al. 2016

Invest. Ophthalmol. Vis. Sci.

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PurposeSpatial updating is the ability to keep track of position and orientation while moving through an environment. We asked how normally sighted and visually impaired subjects compare in spatial updating and in estimating room dimensions.MethodsGroups of 32 normally sighted, 16 low-vision, and 16 blind subjects estimated the dimensions of six rectangular rooms. Updating was assessed by guiding the subjects along three-segment paths in the rooms. At the end of each path, they estimated the distance and direction to the starting location, and to a designated target. Spatial updating was tested in five conditions ranging from free viewing to full auditory and visual deprivation.ResultsThe normally sighted and low-vision groups did not differ in their accuracy for judging room dimensions. Correlations between estimated size and physical size were high. Accuracy of low-vision performance was not correlated with acuity, contrast sensitivity, or field status. Accuracy was lower for the blind subjects. The three groups were very similar in spatial-updating performance, and exhibited only weak dependence on the nature of the viewing conditions.ConclusionsPeople with a wide range of low-vision conditions are able to judge room dimensions as accurately as people with normal vision. Blind subjects have difficulty in judging the dimensions of quiet rooms, but some information is available from echolocation. Vision status has little impact on performance in simple spatial updating; proprioceptive and vestibular cues are sufficient.

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“…In contrast, for the experimenter-guided walking task, no information regarding the upcoming trajectory (i.e., walking distance) was given. Previous research has shown that vision of target locations and salient landmarks while viewing the environment provides contextual information for self-motion updating tasks (Arthur et al , 2007, 2009; Philbeck et al , 2001). It has been speculated that specifically the anticipation of actively walking to a predetermined location forms the basis of the spatiotemporal framework for incoming sensory signals during goal-directed linear locomotion (Philbeck et al , 2001).…”

Section: Discussionmentioning

confidence: 99%

“…In fact, our test environment afforded participants with a highly structured context (well-lit hallway, pictures on the walls). Previous work has validated that previewed landmarks along linear and angular trajectories do facilitate path integration, even when the observer cannot directly sense the objects as they pass (Arthur et al , 2007, 2009; Israël et al , 1996; Philbeck and O’Leary, 2005; Philbeck et al , 2001). However, the contextual information was available to participants in both the target-directed and experimenter-guided tasks.…”

Section: Discussionmentioning

confidence: 99%