Executive Functioning in Students with Emotional and Behavioral Disorders

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Sensory Representation and Learning-Related Plasticity in Mushroom Body Extrinsic Feedback Neurons of the Protocerebral Tract

Gamma-aminobutyric acid immunoreactive feedback neurons of the protocerebral tract are a major component of the honeybee mushroom body. They have been shown to be subject to learning-related plasticity and provide putative inhibitory input to Kenyon cells and the pedunculus extrinsic neuron, PE1. We hypothesize, that learning-related modulation in these neurons is mediated by varying the amount of inhibition provided by feedback neurons. We performed Ca2+ imaging recordings of populations of neurons of the protocerebral-calycal tract (PCT) while the bees were conditioned in an appetitive olfactory paradigm and their behavioral responses were quantified using electromyographic recordings from M17, the muscle which controls the proboscis extension response. The results corroborate findings from electrophysiological studies showing that PCT neurons respond to sucrose and odor stimuli. The odor responses are concentration dependent. Odor and sucrose responses are modulated by repeated stimulus presentations. Furthermore, animals that learned to associate an odor with sucrose reward responded to the repeated presentations of the rewarded odor with less depression than they did to an unrewarded and a control odor

{N,N-Bis[bis(2,2,2-trifluoroethoxy)phosphanyl]methylamine- κ2 P,P′}bis(η5-cyclopentadienyl) titanium(II)

The title compound, [Ti(C5H5)2(C 9H11F12NO4P2)], is a four-membered titanacycle obtained from the reaction of Cp2Ti(η 2-Me3SiC2SiMe3) and CH 3N[P(OCH2CF3)2]2 {N,N-bis[bis(trifluoroethoxy)phosphanyl]methylamine, tfepma}. The Ti II atom is coordinated by two cyclopentadienyl (Cp) ligands and the chelating tfepma ligand in a strongly distorted tetrahedral geometry. The molecule is located on a mirror plane

"... so bitter wie der Geschmack von Heißen gerösteten Kaffeebohnen..." - Trauma, Medialität und Hautfarbe in Kara Walkers Safety Curtain der Staatsoper in Wien

Birgit Haehnel "…and pungent as hot roasted coffee beans…” Trauma, Mediality, und Skin Color in Kara Walker's Safety Curtain in the Vienna State Opera HouseThe traumatic memories of slavery persist and become visible in the shaping of skin color in visual culture, for example. The African-American woman artist Kara Walker grappled with these themes that point to the denial of memory and history in Austria. With her large-scale picture covering the safety curtain at the Vienna State Opera House in 1998, she raised new questions about the interconnections between slavery, racism, and fascism. Walker's silhouettes are defined as a specific design to overcome traumatic experiences with history that are enclosed in the figuration of racial stereotypes. The crucial factor is the effect of the medium: The blank space of the silhouettes is a sublime sign and has the power to break up the traumatic patterns of denial, which are inherent in European visual representations of black-and-white body images. As effectively charged signs touching the spectators’ senses as well as their mental and emotional states, they are able to change thinking or rather cause changes in awareness through perception. This thought refers to Gilles Delueze's concept of the “encountered signs”, Sigmund Freud’s “Erinnerungsspuren” (traces of memory), and Aby Warburg's “Pathosformeln / mnemische Energien”. Finally, the (art) historical creation of meaning is stimulated by the artwork and then entrusted to the spectators