A method for identifying the nearby spatial cues used by animals during transverse orientation |
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| Institution: | 1. Department of Occupational Therapy, Pandit Deendayal Upadhyaya Institute for the Physically Handicapped, New Delhi, India;2. Department of Neurology, GB Pant Post Graduate Institute of Medical Education and Research, New Delhi, India;1. La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, Human Services and Sport, La Trobe University, Bundoora, Australia;2. Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, Canada;3. Department of Physiotherapy Podiatry and Prosthetics and Orthotics, School of Allied Health, Human Services and Sport, La Trobe University, Bundoora, Australia;4. La Trobe University College of Science Health and Engineering, Bundoora, Victoria, Australia;5. RECOVER Injury Research Centre, The University of Queensland, Brisbane, Australia;6. Monash Department of Clinical Epidemiology, Cabrini Institute and Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Australia;7. Department of Surgery, St Vincent''s Hospital, University of Melbourne, Australia;2. The Parker Institute, Copenhagen University Hospital Bispebjerg-Frederiksberg, Denmark;3. Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, Denmark;4. Institute of Bone and Joint Research, Kolling Institute of Medical Research, The University of Sydney, Australia;6. Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia;5. Ronald Reagan UCLA Medical Center, Los Angeles, CA, USA;1. Sunnybrook Holland Orthopaedic & Arthritic Centre, Toronto, Ontario, M4Y 1H1, Canada;2. Department of Physical Therapy, University of Toronto, Toronto, Ontario, M4Y 1H1, Canada;3. Graduate Program in Health, York University, Toronto, Ontario, M4Y 1H1, Canada;4. School of Nursing, Queen''s University, Kingston, Ontario, K7C 2N6, Canada;1. Clinical Services, Macquarie University Hospital, 3 Technology Place, Macquarie University, NSW 2109, Australia;2. Australian Institute of Health Innovation, Macquarie University, NSW 2109, Australia;3. Faculty of Medicine and Health Sciences, Macquarie University, Australia |
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| Abstract: | A method was proposed to locate the nearby cues used by an animal in the case of transverse orientation, where the animal keeps a constant angle with a spatial cue. By studying the value constancy of the angles formed by a moving animal and the direction of all spatial points (constancy being expressed through more or less strong variances), we set up a cartography of the neighbouring space of this animal during a path. Relatively to the area where a low variance is found for angular values, the animal maintains the best angular constancy. The orientating cue used during this path is probably included in this area.The method efficiency is first tested on path models, and then applied to filmed walking crickets. Its heuristic value is established whenever the observer do not want a priori assess the cues the animal is supposed to choose.The practical interest of the method lies in the knowledge it provides of the relative role played by the body axis translations and rotations in the visual fixation and retinal scanning of crickets. |
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