Abstract / Description of output
Navigation abilities decline with age, partly due to deficits in numerous component processes. Impaired switching between these various processes (i.e., switching navigational strategies) is also likely to contribute to age-related navigational impairments. We tested young and old participants on a virtual plus maze task (VPM), expecting older participants to exhibit a specific strategy switching deficit, despite unimpaired learning of allocentric (place) and egocentric (response) strategies following reversals within each strategy. Our initial results suggested that older participants performed worse during place trial blocks but not response trial blocks, as well as in trial blocks following a strategy switch but not those following a reversal. However, we then separated trial blocks by both strategy and change type, revealing that these initial results were due to a more specific deficit in switching to the place strategy. Place reversals and switches to response, as well as response reversals, were unaffected. We argue that this specific "switch-to-place" deficit could account for apparent impairments in both navigational strategy switching and allocentric processing and contributes more generally to age-related decline in navigation.
Original language | English |
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Article number | ARTN 29 |
Number of pages | 9 |
Journal | Frontiers in Aging Neuroscience |
Volume | 4 |
Issue number | 29 |
DOIs | |
Publication status | Published - 1 Nov 2012 |
Keywords / Materials (for Non-textual outputs)
- plus maze
- spatial navigation
- ENTORHINAL CORTEX
- strategy switching
- PREFRONTAL CORTEX
- BEHAVIORAL-EXPERIMENTS
- allocentric processing
- ALZHEIMERS-DISEASE
- WORKING-MEMORY DEFICITS
- virtual reality
- AGED RHESUS-MONKEYS
- CAUDATE-NUCLEUS
- PATH-INTEGRATION
- VIRTUAL ENVIRONMENT
- SPATIAL NAVIGATION
- aging