No effect of hippocampal lesions on stimulus-response bindings

作者：Henson Richard N^*; Horner Aldan J; Greve Andrea; Coope Elisa; Gregori Mariella; Simons Jon S; Erzinclioglu Sharon; Browne Georgina; Kapur Narinder

来源：Neuropsychologia, 2017, 103: 106-114.

DOI：10.1016/j.neuropsychologia.2017.07.024

• Hippocampus
• Amnesia
• Response learning

The hippocampus is believed to be important for rapid learning of arbitrary stimulus-response contingencies, or S-R bindings. In support of this, Schnyer et al. (2006) (Experiment 2) measured priming of reaction times (RTs) to categorise visual objects, and found that patients with medial temporal lobe damage, unlike healthy controls, failed to show evidence of reduced priming when response contingencies were reversed between initial and repeated categorisation of objects (a signature of S-R bindings). We ran a similar though extended object classification task on 6 patients who appear to have selective hippocampal lesions, together with 24 age-matched controls. Unlike Schnyer et al. (2006), we found that reversing response contingencies abolished priming in both controls and patients. Bayes Factors provided no reason to believe that response reversal had less effect on patients than controls. We therefore conclude that it is unlikely that the hippocampus is needed for S-R bindings.

• 出版日期2017-8