Age differences in virtual environment and real world path integration

被引:71
作者
Adamo, Diane E. [2 ,3 ]
Briceno, Emily M. [4 ]
Sindone, Joseph A. [5 ]
Alexander, Neil B. [6 ,7 ,8 ]
Moffat, Scott D. [1 ]
机构
[1] Georgia Inst Technol, Sch Psychol, Atlanta, GA 30332 USA
[2] Wayne State Univ, Eugene Applebaum Coll Pharm & Hlth Sci, Detroit, MI USA
[3] Wayne State Univ, Inst Gerontol, Detroit, MI 48202 USA
[4] Wayne State Univ, Dept Psychol, Detroit, MI 48202 USA
[5] Univ Michigan, Dept Linguist, Ann Arbor, MI 48109 USA
[6] Univ Michigan Hosp, Geriatr Ctr, Mobil Res Ctr, Ann Arbor, MI 48109 USA
[7] Univ Michigan Hosp, Div Geriatr Med, Ann Arbor, MI 48109 USA
[8] Vet Affairs Ann Arbor Hlth Care Syst, Geriatr Res Educ & Clin Ctr, Ann Arbor, MI USA
关键词
aging; Alzheimer's disease; hippocampus; navigation; path integration; spatial memory; VESTIBULAR SYSTEM; OPTIC FLOW; NAVIGATION; LOCOMOTION; MOTION; DIRECTION; DISTANCE; HUMANS; PERCEPTION; MECHANISMS;
D O I
10.3389/fnagi.2012.00026
中图分类号
R592 [老年病学]; C [社会科学总论];
学科分类号
03 ; 0303 ; 100203 ;
摘要
Accurate path integration (PI) requires the integration of visual, proprioceptive, and vestibular self-motion cues and age effects associated with alterations in processing information from these systems may contribute to declines in PI abilities. The present study investigated age-related differences in PI in conditions that varied as a function of available sources of sensory information. Twenty-two healthy, young (23.8 +/- 3.0 years) and 16 older (70.1 +/- 6.4 years) adults participated in distance reproduction and triangle completion tasks (TCTs) performed in a virtual environment (VE) and two "real world" conditions: guided walking and wheelchair propulsion. For walking and wheelchair propulsion conditions, participants wore a blindfold and wore noise-blocking headphones and were guided through the workspace by the experimenter. For the VE condition, participants viewed self-motion information on a computer monitor and used a joystick to navigate through the environment. For TCTs, older compared to younger individuals showed greater errors in rotation estimations performed in the wheelchair condition, and for rotation and distance estimations in the VE condition. Distance reproduction tasks (DRTs), in contrast, did not show any age effects. These findings demonstrate that age differences in PI vary as a function of the available sources of information and by the complexity of outbound pathway.
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页数:9
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