?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Sensory+processing+in+the+pallium+of+a+mormyrid+fish&rft.creator=Prechtl%2C+James+C.&rft.creator=von+der+Emde%2C+Gerhard&rft.creator=Wolfart%2C+Jakob&rft.creator=Karam%C3%BCrsel%2C+Sa%C3%A7it&rft.creator=Akoev%2C+George+N.&rft.creator=Andrianov%2C+Yuri+N.&rft.creator=Bullock%2C+Theodore+H.&rft.subject=Behavioral+Biology&rft.subject=Biophysics&rft.subject=Brain+Imaging&rft.subject=Neurochemistry&rft.subject=Neural+Modelling&rft.subject=Neurology&rft.subject=Neurology&rft.subject=Neurophysiology&rft.description=To+investigate+the+functional+organization+of+higher+brain+levels+in+fish+we+test+the+hypothesis+that+the+dorsal+gray+mantle+of+the+telencephalon+of+a+mormyrid+fish+has+discrete+receptive+areas+for+several+sensory+modalities.+Multiunit+and+compound+field+potentials+evoked+by+auditory%2C+visual%2C+electrosensory+and+water+displacement+stimuli+in+this+weakly+electric+fish+are+recorded+with+multiple+semimicroelectrodes+placed+in+many+tracks+and+depths+in+or+near+area+dorsalis+telencephali%2C+pars+medialis+(Dm).+Most+responsive+loci+are+unimodal%3B+some+respond+to+two+or+more+modalities.+Each+modality+dominates+a+circumscribed+area%2C+chiefly+separate.+Auditory+and+electrical+responses+cluster+in+the+dorsal+500+m+of+rostral+and+caudolateral+Dm%2C+respectively.+Two+auditory+subdivisions+underline+specialization+of+this+sense.+Mechanoreception+occupies+a+caudal+area+overlapping+electroreception+but+centered+500+m+deeper.+Visual+responses+scatter+widely+through+ventral+areas.+Auditory%2C+electrosensory+and+mechanosensory+responses+are+dominated+by+a+negative+wave+within+the+first+50+ms%2C+followed+by+15-55+Hz+oscillations+and+a+slow+positive+wave+with+multiunit+spikes+lasting+from+200-500+ms.+Stimuli+can+induce+shifts+in+coherence+of+certain+frequency+bands+between+neighboring+loci.+Every+electric+organ+discharge+command+is+followed+within+3+ms+by+a+large%2C+mainly+negative+but+generally+biphasic%2C+widespread+corollary+discharge.+At+certain+loci+large%2C+slow+(%22delta+F%22)+waves+usually+precede+transient+shifts+in+electric+organ+discharge+rate.+Sensory+evoked+potentials+in+this+fish+pallium+may+be+more+segregated+than+in+elasmobranchs+and+anurans+and+have+some+surprising+similarities+to+those+in+mammals.+Key+Words%3A+cerebral+cortex%3B+corollary+discharge%3B+induced+rhythms%3B+evoked+potential%3B+gamma+band%3B+lateral+line%3B+mormyrid.&rft.date=1998-09&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=text%2Fhtml&rft.identifier=http%3A%2F%2Fcogprints.org%2F112%2F1%2Fgnath10.html&rft.identifier=++Prechtl%2C+James+C.+and+von+der+Emde%2C+Gerhard+and+Wolfart%2C+Jakob+and+Karam%C3%BCrsel%2C+Sa%C3%A7it+and+Akoev%2C+George+N.+and+Andrianov%2C+Yuri+N.+and+Bullock%2C+Theodore+H.++(1998)+Sensory+processing+in+the+pallium+of+a+mormyrid+fish.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F112%2F