In natural settings, visual perception and object recognition are active processes that involve moving our bodies and sensory organs (here, eyes). We are interested in understanding how our movements through the world and our active visual sampling of our environment is tied to perception and learning, and how it may change as a consequence of prior experience.

Relevant publications:

  • Dragan MC, Leonard TK, Lozano AM, McAndrews MP, Ng K, Ryan JD, Tang-Wei DF, Wynn JC, and Hoffman KL (2016) Pupillary responses and memory-guided visual search reveal age-related and Alzheimer’s-related memory decline.  Behavioural Brain Research DOI:10.1016/j.bbr.2016.09.014 
  • Wynn JS, Bone M, Dragan MC, Hoffman KL, Buchsbaum BR and Ryan JD (2016) Selective scanpath repetition during memory-guided visual search. Visual Cognition 24(1) 15-27 DOI:10.1080/13506285.2016.1175531
  • Leonard TK, Mikkila JM, Gerrard JL, Kaping D, Patel S, Eskandar E, Womelsdorf T, Hoffman KL (2015) Sharp wave ripples during visual exploration in the primate hippocampus. The Journal of Neuroscience 35(44):14771-14782  doi: 10.1523/JNEUROSCI.0864-15.2015
  • Sayegh PF, Hawkins KM, Neagu B, Crawford JD, Hoffman KL, and Sergio LE (2014) Decoupling the actions of the eyes from the hand alters beta and gamma synchrony within SPL. Journal of Neurophysiology.
  • Hoffman KL, Dragan MC, Leonard TK, Micheli C, Montefusco-Siegmund R, Valiante TA (2013) Saccades during visual exploration align hippocampal 3-8 Hz rhythms in human and non-human primates. Frontiers in Systems Neuroscience 7:43. doi: 10.3389/fnsys.2013.00043
  • Sayegh PF, Hawkins KM, Hoffman KL, Sergio LE (2013) Differences in spectral profiles between rostral and caudal premotor cortex when eye-hand actions are decoupled. Journal of Neurophysiology doi:10.1152/jn.00764.2012
  • Leonard TK, Blumenthal G, Gothard KM, Hoffman KL (2012) How macaques view familiarity and gaze in conspecific faces. Behavioral Neuroscience. doi: 10.1037/a0030348
  • Bartlett AM, Ovaysikia S, Logothetis NK and Hoffman KL (2011) Saccades during object viewing modulate oscillatory phase in the superior temporal sulcus. Journal of Neuroscience 31(50):18423-18432. doi:10.1523/JNEUROSCI.4102-11.2011
  • Chau VL, Murphy EL, Rosenbaum RS, Ryan JD and Hoffman KL (2011) A flicker change detection task reveals object-in-scene memory across species. Frontiers in Behavioral Neuroscience. 5:58. doi: 10.3389/fnbeh.2011.00058
  • Gothard KM, Hoffman KL, Battaglia F, McNaughton BL (2001) Dentate gyrus and CA1 ensemble activity during spatial reference frame shifts in the presence and absence of visual input. Journal of Neuroscience 21(18):7284-92.