Fossil Slugs

Phototaxis of Dictyostelium discoideum Slugs

Representational Redescription for Sea Slugs

The paper discusses the Representational Redescription Hypothesis of Clark and Karmiloff-Smith [1]. This hypothesis -the ’RRH’ for short -has two main parts to it. Part one suggests that human cognitive development is a process involving the redescription of knowledge at increasing levels of abstraction. Part two is a claim about the true nature of thought. It states that representational redes...

Synapses , sea slugs , and psychiatry

This year’s Nobel Prize in physiology or medicine, announced on 9 October 2000, has gone to Arvid Carlsson, Paul Greengard, and Eric Kandel. The citation states that the prize is shared for pioneering discoveries in slow synaptic transmission, which are “crucial for an understanding of how the normal functioning of the brain and how disturbances in this signal can give rise to neurological and ...

Slugs: Extensible GR(1) Synthesis

Applying reactive synthesis in practice often requires modifications of the synthesis algorithm in order to obtain useful implementations. We present slugs, a generalized reactivity(1) synthesis tool that has a powerful plugin architecture for modifying any aspect of the synthesis process to fit the application. Slugs comes pre-equipped with a variety of plugins that improve the quality of the ...

Three-dimensional scroll waves organize Dictyostelium slugs.

To test the hypothesis that periodic signals and chemotaxis direct later morphogenesis in Dictyostelium discoideum, we investigated cell behavior and cell movement in slugs. Trails of neutral red-stained prestalk and anterior-like cells were recorded by high-resolution digital image processing. Neutral red-stained anterior-like cells in the prespore zone of slugs move straight forward in the di...