Making smooth moves
Article Abstract:
Research suggests that human motor movements are chosen to minimize jerkiness and to maximize smoothness and efficiency. A new study suggests that smoothness is a consequence of trying to achieve maximum efficiency and investigates saccadic eye movements and goal-directed arm movements. It concludes that neural control signals are corrupted by noise which increases with the size of the control signal, thus the final trajectory shape is selected because it requires minimal variation to the final eye or arm position.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
Disruption and sequence identification of 2,000 genes in mouse embryonic stem cells
Article Abstract:
It has been possible to develop a high-throughput mutagenesis method based on gene trapping that permits the automated identification of sequence tags from the mutated genes. This approach traps and mutates genes irrespective of their expression status in embryonic stem cells. Data obtained from this method support a model in which most of the genome is accessible to retroviral integration with a subset of the integration events landing in 'hotspots' and the rest representing random integrations.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Structural basis for the function and inhibition of an influenza virus proton channel. The mechanism by which influenza A virus nucleoprotein forms oligomers and binds RNA
- Abstracts: Making a killing: the power and influence of animal agriculture in America. Never on Sunday
- Abstracts: Perceived predation risk as a function of predator dietary cues in terrestrial salamanders. Hunting behaviour of a sympatric felid and canid in relation to vegetative cover
- Abstracts: Molecular-sieve catalysts for the selective oxidation of linear alkanes by molecular oxygen. Heterogeneous catalysts obtained by grafting metallocene complexes onto mesoporous silica
- Abstracts: Clinton portrays science as the path to racial harmony. Clinton sets a careful course on climate.... Clinton struggles to appease all sides over climate proposals