By Robert Thompson, Francis M. Crinella, Jen Yu
This e-book is the end result of a decade of study at the neu roanatomical mechanisms of studying within the younger laboratory rat. it's basically a discourse at the practical association of the mind when it comes to problem-solving skill and intelli gence. through the interval among 1980 and 1989, good over a thousand weanling albino rats have been subjected to localized mind harm (or sham operations in relation to the controls) lower than deep anesthesia and aseptic surgical stipulations, have been allowed tore hide, and hence have been established on a large choice of prob lems designed to degree common studying skill. considering vir tually all the things of the mind rostral to the medulla has been explored with lesions, it has turn into attainable not just to map a couple of "putative" mind platforms underlying the purchase of distinct problem-solving initiatives, yet to isolate numerous neu roanatomical mechanisms that seem to be selectively in volved within the acquisition of specific types of goal-directed discovered actions. Of specific curiosity was once the invention of a "nonspecific mechanism" (previously mentioned in our re seek reviews because the "general studying system") inhabiting the inner components of the mind. One target of this quantity used to be to make those maps to be had in one resource. one other was once to supply a descrip tion of studying syndromes coming up from neighborhood lesions to vary ent elements of the brain.
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Additional resources for Brain Mechanisms in Problem Solving and Intelligence: A Lesion Survey of the Rat Brain
Maps of Learning Syndromes These maps show the site of a "typical" lesion placement to a given structure and its associated syndrome on a line drawing of a brain section. In order to provide an indication as to the magnitude of the deficit observed in the sample of braindamaged animals examined, the following procedure was used: A moderate deficit (mean error score of the braindamaged group was less than twice as large as that of the corresponding control group) was listed under the syndrome in plain lowercase letters, while a severe deficit (mean error score was at least twice as large as that of the corresponding control group) was denoted in underscored lowercase letters.
Every 3rd or 4th section through the lesion was retained and subsequently photographed at 12 x by using the section as a negative film in an enlarger. 6). Throughout this monograph, however, only the first two zones were considered in describing the locus and extent of the lesions, since the area of gliosis may contain some normal cells and intact fiber tracts. Constructing the Atlas The results of this lesion survey have been depicted on two separate sets of maps. 6. CHAPTER 2 Unstained brain section showing an electrolytic lesion in the region of the red nucleus.
Aversively Motivated Tasks The animal was required to learn, in succession, the visual discrimination problem, the maze problem, and finally the inclined plane discrimination problem. GENERAL METHODS 43 Visual Discrimination Each rat was allowed to explore the goal box for 5-10 min. The windows were blocked during this time to prevent the animal from entering the choice chamber. Subsequently, each rat was trained to run into the choice chamber from the start box, displace one of the gray cards blocking the window, and enter the goal box in order to escape from (or avoid) foot shock.