?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Discriminatory+approach+to+auditory+stimuli+in+Guinea+fowl+(Numida+meleagris)+after+hyperstriatal%2Fhippocampal+brain+damage&rft.creator=Oades%2C+&rft.subject=Behavioral+Neuroscience&rft.subject=Animal+Behavior&rft.subject=Animal+Cognition&rft.subject=Ethology&rft.subject=Psychobiology&rft.description=Introduction%3A+%0AThe+dorsomedial+hyperstriatum+accessorium+(DMHA)+appears+to+mediate+some+functions+simialr+to+the+mammalian+hippocampus+on+tests+in+the+visual+modality+(+Oades+1976a%2C+1976b).+Here+we+investigate+similar+attention-related+functions+in+the+auditory+modality+after+brain+damage+in+and+around+the+avian+hippocampus.+To+what+extent+do+these+functions+extend+posterior+to+the+posterior+commissure+(parahippocampus)+and+relate+to+the+apparent+hierarchical+function+reported+from+auditory+areas+that+are+adjacent+posteriorly+(e.g.+Field+L)+%3F%0A%0AMethods%3A%0AOperation%3A+Aspiration+lesions+and+cuts+were+made+to+discrete+parts+of+the+hyperstriatum%2Fhippocampus+anterior+and+posterior+to+the+posterior+commissure+in+adult+birds%3A+the+performance+of+these+two+lesion+groups+was+compared+with+sham-controls..%0ATraining%2Ftesting%3A+Guinea+fowl+were+trained+to+approach%2C+feed+and+retreat+from+a+food+dish+after+hearing+a+species-specific+food-trill.+An+ethogram+including+approach%2C+search%2C+locomotion+and+tension+behaviour+was+recorded+before+and+after+operation+for+a+training+and+test+regime+of+variations+of+the+natural+calls+and+other+sounds%0AHistology+is+shown+in+figure+1+%3A+Sonograms+of+fast-%2C+slow%2C+novel-%2C+arousal-trills+and+%22watch-winding%22+are+shown+in+figure+2+%3A+Photographs+and+Sketches+of+the+behavioural+responses+are+shown+in+figure+3.%0A%0AResults%3A+%0A1%2F+Both+groups+with+anterior+and+posterior+lesions+showed+impaired+recognition+of+the+stimulus+variations%2C+shown+a)+by+more+search+behaviour+in+both+groups%2C+and+b)+increased+approach+tendencies+in+the+posterior-lesion+group.%0A%5BNonetheless+test+stimuli+were+rcognized+to+be+different+-+e.g.+search+after+extinction+%3E+after+filtered+trills+%3E+after+novel+stimuli%5D%0A2%2F+Extended+approach+after+posterior-lesions+was+followed+by+a+long+period+of+arousal+%2F+high+tension.%0A3%2F+Transient+tension+behaviour+after+anterior+damage+habituated+rapidly+-+search+behaviour+changed+to+low+tension..%0A%5BThe+anterior+lesioned+group+responded+with+search+to+filtered+trills+-+there+was+message+content+still+in+the+stimulus%2C+whereas+the+posterior+group+changed+behaviour.%5D%0A%0AConclusions%3A%0AIt+is+proposed+that+after+anterior+hyperstriatal+damage+(hippocampus)+there+were+changes+in+the+thresholds+for+matching+specifications+of+learned+stimuli+with+new+sensory+input+-+initial+activation+was+followed+by+disengagement.%0AIn+contrast+more+posterior+damage+incurred+an+impairment+to+the+general+rules+for+the+selection+of+sensory+input+-+hence+this+led+to+more+generalised+approach+and+arousal+responses.+%0AIn+conclusion+there+is+a+hierarchy+of+associative+function+extending+anterior+from+the+sensory+field+L%2C+and+this+is+discussed+in+terms+of+the+function+impaired+after+brain+damage+-+perseveration+(gross+behavioural+consequences)+and+persistence+(application+of+recognition+units+to+patterns+of+sensory+stimulation).%0A&rft.publisher=Elsevier&rft.date=1980&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F1548%2F2%2Fbird-g-fowl-behav-proc-80.pdf&rft.identifier=++Oades%2C+++(1980)+Discriminatory+approach+to+auditory+stimuli+in+Guinea+fowl+(Numida+meleagris)+after+hyperstriatal%2Fhippocampal+brain+damage.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F1548%2F