The influence of the ganglionic blocking agent ganlion on viscerovisceral and viscerocerebral reactions of the cat

In 21 subacute or chronic cats the influence of gallbladder distention on heart rate, respiratory movements, bio-electrical activity of the cerebral cortex and motor behavior were studied under normal conditions and after intraperitoneal administration of a ganglionic blocking agent. In control groups without administration of the drug, changes of heart and respiratory rates were observed during the mechanical stimulation of the gallbladder. These effects were independent of a sleeping or non-sleeping state of the animal. In some cases viscerovisceral reactions could be accompanied by an arousal reaction. After administration of the blocking agent in amounts ranging between 5–50 mg/kg body wt the viscerovisceral reactions were inhibited, whereas the behavioral arousal remained.     

The meaning of the act: reflections on the expressive force of reproductive decision making and policies

Prenatal and preconceptual testing and screening programs provide information on the basis of which people can choose to avoid the birth of children likely to face disabilities. Some disabilities advocates have objected to such programs and to the decisions made within them, on the grounds that measures taken to avoid the birth of children with disabilities have an "expressive force" that conveys messages disrespectful to people with disabilities. Assessing such a claim requires careful attention to general considerations relating meaning, intention, and social practices; it has only begun to receive such attention. Building on work by Allen Buchanan, who has challenged this claim, I further consider the disabilities advocates' objection, ultimately concluding that it is misplaced; neither individual actions nor general practices of this type necessarily express disrespectful messages.     

Getting a grip on numbers: numerical magnitude priming in object grasping

To investigate the functional connection between numerical cognition and action planning, the authors required participants to perform different grasping responses depending on the parity status of Arabic digits. The results show that precision grip actions were initiated faster in response to small numbers, whereas power grips were initiated faster in response to large numbers. Moreover, analyses of the grasping kinematics reveal an enlarged maximum grip aperture in the presence of large numbers. Reaction time effects remained present when controlling for the number of fingers used while grasping but disappeared when participants pointed to the object. The data indicate a priming of size-related motor features by numerals and support the idea that representations of numbers and actions share common cognitive codes within a generalized magnitude system.     

Selection-for-action in visual search

Grasping an object rather than pointing to it enhances processing of its orientation but not its color. Apparently, visual discrimination is selectively enhanced for a behaviorally relevant feature. In two experiments we investigated the limitations and targets of this bias. Specifically, in Experiment 1 we were interested to find out whether the effect is capacity demanding, therefore we manipulated the set-size of the display. The results indicated a clear cognitive processing capacity requirement, i.e. the magnitude of the effect decreased for a larger set size. Consequently, in Experiment 2, we investigated if the enhancement effect occurs only at the level of behaviorally relevant feature or at a level common to different features. Therefore we manipulated the discriminability of the behaviorally neutral feature (color). Again, results showed that this manipulation influenced the action enhancement of the behaviorally relevant feature. Particularly, the effect of the color manipulation on the action enhancement suggests that the action effect is more likely to bias the competition between different visual features rather than to enhance the processing of the relevant feature. We offer a theoretical account that integrates the action-intention effect within the biased competition model of visual selective attention.