title: Automated discrimination of psychotropic drugs in mice via computer vision-based analysis.
abstract: We developed an inexpensive computer vision-based method utilizing an algorithm which differentiates drug-induced behavioral alterations. The mice were observed in an open-field arena and their activity was recorded for 100 min. For each animal the first 50 min of observation were regarded as the drug-free period. Each animal was exposed to only one drug and they were injected (i.p.) with either amphetamine or cocaine as the stimulant drugs or morphine or diazepam as the inhibitory agents. The software divided the arena into virtual grids and calculated the number of visits (sojourn counts) to the grids and instantaneous speeds within these grids by analyzing video data. These spatial distributions of sojourn counts and instantaneous speeds were used to construct feature vectors which were fed to the classifier algorithms for the final step of matching the animals and the drugs. The software decided which of the animals were drug-treated at a rate of 96%. The algorithm achieved 92% accuracy in sorting the data according to the increased or decreased activity and then determined which drug was delivered. The method differentiated the type of psychostimulant or inhibitory drugs with a success ratio of 70% and 80%, respectively. This method provides a new way to automatically evaluate and classify drug-induced behaviors in mice.
authors.affiliation: Department of Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey.
authors.forename: Zeynep
authors.initials: Z
authors.lastname: Yucel
authors.forename: Yildirim
authors.initials: Y
authors.lastname: Sara
authors.forename: Pinar
authors.initials: P
authors.lastname: Duygulu
authors.forename: Rustu
authors.initials: R
authors.lastname: Onur
authors.forename: Emre
authors.initials: E
authors.lastname: Esen
authors.forename: A Bulent
authors.initials: AB
authors.lastname: Ozguler
mesh_terms: D000465:Algorithms; D000661:Amphetamine / Q000494:pharmacology; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects* / Q000502:physiology; D000697:Central Nervous System Stimulants / Q000494:pharmacology; D003042:Cocaine / Q000494:pharmacology; D003975:Diazepam / Q000494:pharmacology; D005106:Exploratory Behavior / Q000187:drug effects / Q000502:physiology; D006993:Hypnotics and Sedatives / Q000494:pharmacology; D008297:Male; D051379:Mice; D009043:Motor Activity / Q000187:drug effects / Q000502:physiology; D009480:Neuropharmacology / Q000295:instrumentation / Q000379:methods*; D010363:Pattern Recognition, Automated / Q000379:methods*; D011619:Psychotropic Drugs / Q000494:pharmacology*; D012984:Software; D014741:Video Recording / Q000379:methods*
chemical_list: D000697:Central Nervous System Stimulants; D006993:Hypnotics and Sedatives; D011619:Psychotropic Drugs; D000661:Amphetamine; D003042:Cocaine; D003975:Diazepam