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van Doornik J.,University of Aalborg | Azevedo Coste C.,Laboratory of Microelectronics | Azevedo Coste C.,French Institute for Research in Computer Science and Automation | Ushiba J.,Keio University | And 2 more authors.
Muscle and Nerve | Year: 2011

Introduction: In this study we investigated the mechanisms responsible for soleus muscle contraction during quiet standing. Methods: Subjects stood on a platform that was randomly moved forward or downward or rotated around the ankle. Results: Downward perturbation caused a shortlatency drop in averaged rectified soleus electromyography (SOL EMG). SOL drop increased monotonically with downward acceleration amplitude. Ischemia above the knee abolished or diminished this drop. Ischemia above the ankle had no diminishing effect. Vibration of the Achilles tendon had a diminishing effect on the amplitude of SOL responses. Conclusions: The short-latency drop in SOL observed for downward perturbation might be due to a decrease in positive afferent feedback due to the sudden decrease in body weight. This implies the existence of an ongoing afferent feedback loop toward the SOL motoneuron pool from force-sensitive receptors. Both Ia and Ib afferents probably play a role in the responses observed. © 2010 Wiley Periodicals, Inc.

Xie Y.,Laboratory of Microelectronics | Li Y.,Laboratory of Microelectronics
Journal of University of Science and Technology of China | Year: 2011

The De Bruijn graph which has a small diameter and easy routing is a suitable topology for on-chip communication. A De Bruijn graph network system-level model using SystemC and an effective routing algorithm was proposed. The model used wormhole switching to route and transfer packets, and used reliable routing and virtual channels to prevent deadlock and improve throughput.

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