A. N. Healey

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The authors assessed rats' encoding of the appearance or egocentric position of objects within visual scenes containing 3 objects (Experiment 1) or 1 object (Experiment 2A). Experiment 2B assessed encoding of the shape and fill pattern of single objects, and encoding of configurations (object + position, shape + fill). All were assessed by testing rats'(More)
The aims of this study were to evaluate several clinical and instrumental parameters in a large number of patients with constipation and incontinence as well as in healthy controls and discuss their potential implications in the functional aspects of these disorders. Eighty-four constipated and 38 incontinent patients and 45 healthy controls were submitted(More)
Hippocampal-lesioned rats (HPC) and sham controls (SH) learned constant-negative visual discriminations among scenes in a Y-maze. Any arm could be start arm for a trial. Two choice scenes ("constant" and "variable") were shown in the other arms. In Experiment 1, each problem had 2 constants. One or the other constant appeared on every trial, and the(More)
Rats with fornix transection, or with cytotoxic retrohippocampal lesions that removed entorhinal cortex plus ventral subiculum, performed a task that permits incidental learning about either allocentric (Allo) or egocentric (Ego) spatial cues without the need to navigate by them. Rats learned eight visual discriminations among computer-displayed scenes in a(More)
Rats learned discriminations in which 2 familiar compound visual stimuli AB and CD were nonreinforced, whereas less-familiar compounds (EF, GH, IJ...) were reinforced (constant-negative paradigm). Such discriminations can in principle be acquired through elemental (nonconfigural) learning. Three different types of compound--object/object, object/position,(More)
Dietary fiber fortification of food offers a preventative strategy that is a less invasive alternative to laxatives and enemas in the management of constipation in elderly individuals. To determine if a moderate increase in fiber provided in foods would increase bowel movement frequency among elderly institutionalized residents, data were collected on the(More)
The new millennium was a turning point for the scrutiny of quality and safety in healthcare. An increasing number of studies, investigations, reports and audits worldwide acknowledge that there is a significant risk of unintentional harm to surgical patients. The reasons for this are complex, but, in broad terms, surgical systems are to some degree failing(More)
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