Magnetic resonance imaging changes in a patient with migraine attack and transient global amnesia after cardiac catheterization

The presence of magnetic resonance imaging (MRI) abnormalities in patients with transient global amnesia has been an interesting phenomenologic finding. Several theories surround the occurrence of this syndrome, but little is known about its true physiopathology. We present a case of transient global amnesia after cardiac catheterization associated with migraine headache and MRI changes compatible with an ischemic insult. A discussion on potential explanations for this finding is made, as well as a review of the pertinent literature.     

Using fMRI to investigate

Using fMRI, we investigated the functional organization of prefrontal cortex (PFC) as participants briefly thought of a single just-experienced item (i.e., refreshed an active representation). The results of six studies, and a meta-analysis including previous studies, identified regions in left dorsolateral, anterior, and ventrolateral PFC associated in varying degrees with refreshing different types of information (visual and auditory words, drawings, patterns, people, places, or locations). In addition, activity increased in anterior cingulate with selection demands and in orbitofrontal cortex when a nonselected item was emotionally salient, consistent with a role for these areas in cognitive control (e.g., overcoming “mental rubbernecking”). We also found evidence that presenting emotional information disrupted an anterior component of the refresh circuit. We suggest that refreshing accounts for some neural activity observed in more complex tasks, such as working memory, long-term memory, and problem solving, and that its disruption (e.g., from aging or emotion) could have a broad impact.     

Jews,race, and capitalism in the German-Jewish context

The Shoah has effectively brought to an end attempts to define the Jews racially. Yet in the half century before the 1930s, for German Jewish scholars, the racial identity of the Jews was an open question. These scholars were deeply engaged in debates over Jewish collective identity and the contemporary Jewish condition, and in these debates race played a critical role. For these scholars, race and racial theories were normative, and they exploited them for their own intellectual, political, and social purposes. Of special interest is the normative nature of racial discourse as German Jewish scholars adopted it and applied it to examine the nexus of Jews and capitalism. These scholars accepted the notion of a Jewish racial disposition for capitalism, including this notions negative aspects, while they also used it to construct a positive Jewish identity. The history of Jewish engagement with race suggests the need for a more radically historicist approach to the Jewish past, albeit this will be a most difficult scholarly challenge.Id like to thank Gil Anidjar, Nina Caputo, Steven Zipperstein, and an anonymous reviewer for their comments and criticisms of this essay.     

How perception impacts on drawings

In 3 experiments the authors investigate how errors in perception produce errors in drawings. In Experiment 1, when Shepard stimuli were shown as a pair of tables, participants made severe errors in trying to adjust 1 part of the stimulus to match the other. When the table legs were removed, revealing a pair of parallelograms with minimal perspective cues, the illusion was weaker. The authors predicted that participants would err when drawing the table but not the parallelogram stimuli. The results of Experiment 2 support the prediction and establish a direct link between degree of perceptual distortion of the table stimuli and the severity of error in drawing. When drawing only the right-hand part of the figure, participants also erred to a greater degree in drawing the table than the parallelogram (Experiment 3). Collectively, the results suggest that perceptual distortion is linked with errors in drawing the table stimuli.