ERIC Number: EJ1000132
Record Type: Journal
Publication Date: 2012-Oct
Abstractor: As Provided
Reference Count: 0
The GABAergic Anterior Paired Lateral Neurons Facilitate Olfactory Reversal Learning in "Drosophila"
Wu, Yanying; Ren, Qingzhong; Li, Hao; Guo, Aike
Learning & Memory, v19 n10 p478-486 Oct 2012
Reversal learning has been widely used to probe the implementation of cognitive flexibility in the brain. Previous studies in monkeys identified an essential role of the orbitofrontal cortex (OFC) in reversal learning. However, the underlying circuits and molecular mechanisms are poorly understood. Here, we use the T-maze to investigate the neural mechanism of olfactory reversal learning in "Drosophila". By adding a reversal training cycle to the classical learning protocol, we show that wild-type flies are able to reverse their choice according to the alteration of conditioned stimulus (CS)-unconditioned stimulus (US) contingency. The reversal protocol induced a specific suppression of the initial memory, an effect distinct from memory decay or extinction. GABA down-regulation in the anterior paired lateral (APL) neurons, which innervate the mushroom bodies (MBs), eliminates this suppression effect and impairs normal reversal. These findings reveal that inhibitory regulation from the GABAergic APL neurons facilitates olfactory reversal learning by suppressing initial memory in "Drosophila".
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A