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BIOLOGICALLY BASED ARTIFICIAL NAVIGATION SYSTEMS: REVIEW AND PROSPECTS
- O. Trullier, S. Wiener, A. Berthoz, Jean-Arcady Meyer
- Medicine, PsychologyProgress in Neurobiology
- 1 April 1997
This paper presents navigation strategies within a four-level hierarchical framework based upon levels of complexity of required processing (Guidance, Place recognition-triggered Response, Topological navigation, Metric navigation), and introduces computational models of animal navigation, i.e. of animats.
Postural readjustments induced by linear motion of visual scenes
From the dynamic relationships between the velocity of the moving visual scene and the amplitude of sway, it was concluded that the postural readjustment is proportional to a low pass filtering of the logarithm of the velocity.
Reference Frames for Spatial Cognition: Different Brain Areas are Involved in Viewer-, Object-, and Landmark-Centered Judgments About Object Location
- G. Committeri, G. Galati, A. Paradis, L. Pizzamiglio, A. Berthoz, D. LeBihan
- Psychology, MedicineJournal of Cognitive Neuroscience
- 1 November 2004
Results strongly demonstrate that viewer-centered (egocentric) coding is restricted to the dorsal stream and connected frontal regions, whereas a coding centered on external references requires both dorsal and ventral regions, depending on the reference being a movable object or a landmark.
The neural basis of egocentric and allocentric coding of space in humans: a functional magnetic resonance study
- G. Galati, E. Lobel, G. Vallar, A. Berthoz, L. Pizzamiglio, D. Le Bihan
- Psychology, MedicineExperimental Brain Research
- 1 July 2000
The right-hemisphere lateralization and the partial superposition of the egocentric and the object-based networks is discussed in the light of neuropsychological findings in brain-damaged patients with unilateral spatial neglect and of neurophysiological studies in the monkey.
Eye-head coordination for the steering of locomotion in humans: an anticipatory synergy
- R. Grasso, P. Prévost, Y. Ivanenko, A. Berthoz
- Psychology, MedicineNeuroscience Letters
- 4 September 1998
It is suggested that anticipatory orienting synergies belong to the behavioural repertoire of human navigation and may reflect the need to prepare a stable reference frame for intended action.
Head stabilization during various locomotor tasks in humans
The study emphasizes the importance of head stabilization as part of the postural control system and described as a basis for inertial guidance.
Motor processes in mental rotation
This work directly test the hypothesis that transformations of mental images are at least in part guided by motor processes by means of a dual-task paradigm in which subjects perform the Cooper-Shepard mental rotation task while executing an unseen motor rotation in a given direction and at a previously-learned speed.
Functional Anatomy of a Prelearned Sequence of Horizontal Saccades in Humans
- L. Petit, C. Orssaud, N. Tzourio, F. Crivello, A. Berthoz, and Bernard Mazoyer
- Psychology, MedicineThe Journal of Neuroscience
- 1 June 1996
Results from PET studies on spatial vision suggest that the dorsal visuospatial pathway could be extended toward the frontal premotor region, consistent with the early proposal that perceptual and intentional components of spatial information are mediated through superior parietal and frontal areas.
Functional MRI of galvanic vestibular stimulation.
- E. Lobel, J. Kleine, D. Bihan, A. Leroy-Willig, A. Berthoz
- Psychology, MedicineJournal of neurophysiology
- 1 November 1998
Using a simple paradigm, it is shown that GVS can be implemented safely in the fMRI environment and Manipulating stimulus waveforms and thus the GVS-induced subjective vestibular sensations in future imaging studies may yield further insights into the cortical processing of Vestibular signals.
Mental navigation along memorized routes activates the hippocampus, precuneus, and insula
Investigation of the functional anatomy of mental simulation of routes (MSR) in five normal volunteers found that MSR appears to be subserved by two distinct networks: a non-specific memory network including the posterior and middle parts of the hippocampal regions, the dorsolateral pre-frontal cortex and the posterior cingulum, and a specific mental navigation network.