Neural correlates of establishing, maintaining, and switching brain states

Although the study of brain states is an old one in neuroscience, there has been growing interest in brain state specification owing to MRI studies tracing brain connectivity at rest. In this review, we summarize recent research on three relatively well-described brain states: the resting, alert, and meditation states. We explore the neural correlates of maintaining a state or switching between states, and argue that the anterior cingulate cortex and striatum play a critical role in state maintenance, whereas the insula has a major role in switching between states. Brain state may serve as a predictor of performance in a variety of perceptual, memory, and problem solving tasks. Thus, understanding brain states is critical for understanding human performance.     

Components of task switching: A closer look at task switching and cue switching

Research using the diffusion model to decompose task-switching effects has contributed to a better understanding of the processes underlying the observed effect in the explicit task cueing paradigm: Previous findings could be reconciled with multiple component models of task switching or with an account on compound-cue retrieval/repetition priming. In the present study, we used two cues for each task in order to decompose task-switch and cue-switch effects. Response time data support previous findings that comparable parts of the switching effect can be attributed to cue-switching and task-switching. A diffusion model analysis of the data confirmed that non-decision time is increased and drift rates are decreased in unpredicted task-switches. Importantly, it was shown that non-decision time was selectively increased in task-switching trials but not in cue-switching trials. Results of the present study specifically support the notion of additional processes in task-switches and can be reconciled with broader multiple component accounts.     

Cervical Amipaque myelography with lateral C1/C2 puncture with a conventional fluoroscopy device

The paper presents a method of carrying out cervical myelography by lateral C1/C2-puncture (LCP) using a conventional fluoroscopic device with an image-intensifying TV-chain. The patient is deposited on a specially designed transverse table. The amount of time and picture-quality are equale to those for costly special apparatus.     

A device for teaching the theory of technique.

The usefulness of comparing dream psychology and neurosis psychology is demonstrated in the teaching of a course on the theory of technique at the Pittsburgh Psychoanalytic Institute. Candidates are assigned the task of writing a five-minute segment of free associations using assigned background material, resistances to be demonstrated, and assigned current and past conflicts. The candidates then present their free associations to the class for analysis. Explication of educational and developmental issues is given.     

A Response To H. O. Mounce

Wittgenstein: “If a lion could speak, we could not understand him.” (PI, p. 223) Wittgenstein bids us to be wary of trying to explain or interpret language and its use, instead of limiting ourselves – with a rigorous discipline – to describing such use as comprehensively and clearly as we can. This injunction, it seems to me, is important even when discussing ‘normal’, ‘everyday’ uses of language by fully sentient human beings, but even more so in such unique cases of sentient disability as Helen Keller’s. As the above quote suggests, explanatory extrapolation from the behaviour of animals risks even greater philosophical confusion.