Canine conjoined twinning: A pathoanatomical study of a Lhasa Apso symmetrical cephalothoracopagus.

A female pair of conjoined twins of the Lhasa Apso canine breed was subjected to tomographic and anatomical examinations. The twins had only one head and neck. The two ribcages were joined, extending to the umbilicus, with duplicated structures thereafter.

Self-Control of Task Difficulty During Early Practice Promotes Motor Skill Learning.

This study was designed to determine whether the effect of self-control of task difficulty on motor learning is a function of the period of self-control administration. In a complex anticipation-coincidence task that required participants to intercept 3 targets with a virtual racquet, the task difficulty was either self-controlled or imposed to the participants in the two phases of the acquisition session. First, the results confirmed the beneficial effects of self-control over fully prescribed conditions.

Attentional focus effects on sprint start performance as a function of skill level.

Several researchers have demonstrated that an external focus of attention (about movement's effects) during movement execution allowed better performances and learning of various motor tasks than an internal focus of attention (about movement itself). However, attentional focus effects have not been studied in tasks requiring explosive actions preceded by fast reaction time to a signal, such as a sprint start. We hypothesised that the beneficial effect of external focus of attention would be observed in the different stages of the sprint start (i.

Self-control of task difficulty during training enhances motor learning of a complex coincidence-anticipation task.

The aim of the present work was to analyze the influence of self-controlled task difficulty on motor learning. Participants had to intercept three targets falling at different velocities by displacing a stylus above a digitizer Task difficulty corresponded to racquet width. Half the participants (self-control condition) could choose the racquet width at the beginning of each trial.

Transmission over 300 km of Teralight fiber with an all integrated ETDM 40 Gbit/s optoelectronic transmitter module.

We present here an all-integrated ETDM 40 Gbit/s optoelectronic transmitter module, which has been developed by the French RNRT ERMIONE consortium. This transmitter integrates the final three high speed functions - namely, the electrical multiplexer, the driver and the electro-absorption modulator - in a single compact and low-cost module. This device has permitted a 40 Gbit/s single channel error-free transmission over 300 km of Teralight fiber.