In Aplysia, repeated trials of aversive stimuli produce long-term sensitization (LTS) of defensive reflexes and suppression of feeding. Whereas the cellular underpinnings of LTS have been characterized, the mechanisms of feeding suppression remained unknown. Here, we report that LTS training induced a long-term decrease in the excitability of B51 (a decisionmaking neuron in the feeding circuit) that recovered at a time point in which LTS is no longer observed (72 h post-treatment). These findings indicate B51 as a locus of plasticity underlying feeding suppression. Finally, treatment with serotonin to induce LTS failed to alter feeding and B51 excitability, suggesting that serotonin does not mediate the effects of LTS training on the feeding circuit.
The aim of this paper is to introduce a multirotorcraft with morphing capabilities. Unlike conventional multicopters whose body fly in a horizontal configuration, the proposed platform is be able to rotate its body into a vertical flying mode configuration. The research presented considers an 8-engine vehicle that is able to fly with 4-engines in case of rotor failure. The vertical flight mode is also intended for enabling navigation through narrow areas where conventional helicopter are too big to operate properly. Also, the convertible flight functionality allows saving battery if necessary. The dynamic model of the vehicle while performing in horizontal and vertical configurations is presented. An animated model shows the functionality of the vehicle while performing the transition maneuver.
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