Citation: Gherri, E., Gooray, E. & Forster, B. (2016). Cue-locked lateralized components in a tactile spatial attention task: Evidence for a functional dissociation between ADAN and LSN. Psychophysiology, 53(4), pp. 507-517. doi: 10.1111/psyp.12596 This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent Author NotesThe study was conducted in the Cognitive Neuroscience Suite of the University of Edinburgh and the authors would like to thank Shyla Hossain and Chrysa Retsa for their help with data collection. 2 AbstractERP studies investigating the control processes responsible for spatial orienting in touch have consistently observed that the anterior directing attention negativity (ADAN) elicited by an attention directing cue is followed by a sustained negativity contralateral to the cued hand.Recent evidence suggested that the later negativity, labelled late somatotopic negativity (LSN), might reflect distinct neuro-cognitive processes from those associated with the ADAN. To investigate the functional meaning of the ADAN and LSN components, we measured eventrelated brain potentials elicited by bilateral tactile cues indicating to covertly shift tactile attention to the left or right hand. Participants performed two spatial attention tasks which differed only for the difficulty of the target/nontarget discrimination at attended locations. The LSN but not the ADAN was sensitive to our experimental manipulation of task difficulty, suggesting that this component might reflect sensory-specific preparatory processes prior to a forthcoming tactile stimulus.Running Head: Cue-locked lateralized components in tactile attention tasks