▁Sch olar ship . ▁  Bus se ▁completed ▁her ▁post do ctor al ▁work ▁at ▁the ▁Smith - K ett le well ▁E ye ▁Research ▁Institute ▁in ▁San ▁Francisco , ▁USA ▁in ▁ 2 0 0 7 ▁and ▁then ▁moved ▁to ▁the ▁Institute ▁of ▁O ph th alm ology ▁at ▁the ▁University ▁College ▁London , ▁in ▁the ▁United ▁Kingdom ▁to ▁work ▁as ▁a ▁Research ▁Associ ate ▁under ▁the ▁ment or ship ▁of ▁Mat te o ▁Car and ini ▁from ▁ 2 0 0 8 – 2 0 1 0 .   Under ▁Car and ini , ▁Bus se ▁expl ored ▁visual ▁processing ▁in ▁the ▁cat ▁V 1 ▁and ▁visual ▁behavior ▁in ▁m ice . ▁ ▁C ogn itive ▁Neu ros cience ▁of ▁Att ention ▁ ▁In ▁the ▁W old or ff ▁Lab , ▁Bus se ▁expl ored ▁cave ats ▁to ▁f M RI ▁experimental ▁trial ▁structure ▁in ▁human ▁f M RI ▁experiments . ▁Since ▁f M RI ▁experiments ▁often ▁suffer ▁from ▁extensive ▁overlap ▁of ▁adjacent ▁trial ▁brain ▁signals , ▁experiment ers ▁started ▁to ▁implement ▁“ null ” ▁or ▁“ no - st im ” ▁tri als ▁in ▁order ▁to ▁provide ▁time ▁for ▁extra ction ▁of ▁stim ulus ▁generated ▁signal ▁during ▁non - event ▁tri als . ▁However , ▁Bus se ▁sought ▁to ▁explore ▁the ▁hypothesis ▁that ▁“ null - event ” ▁tri als ▁actually ▁e voke ▁unique ▁brain ▁activity ▁patterns , ▁called ▁the ▁omitted ▁stim ulus ▁response ▁( OS R ). ▁In ▁am ▁aud itory ▁task , ▁Bus se ▁found ▁significant ▁OS R