spatial coordination
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2022 ◽  
Vol 114 ◽  
pp. 105936
Author(s):  
Chi Nguyen ◽  
Uwe Latacz-Lohmann ◽  
Nick Hanley ◽  
Steven Schilizzi ◽  
Sayed Iftekhar

2022 ◽  
Vol 192 ◽  
pp. 107271
Author(s):  
Laure Kuhfuss ◽  
Raphaële Préget ◽  
Sophie Thoyer ◽  
Frans P. de Vries ◽  
Nick Hanley

Land ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 580
Author(s):  
Jingming Liu ◽  
Xianhui Hou ◽  
Chuyu Xia ◽  
Xiang Kang ◽  
Yujun Zhou

Metrorail accessibility is an important indicator that influences urban spatial form. For this article, we created a 3SFCA method to analyze the Metrorail accessibility of Shanghai covering four levels: traffic analysis zones (TAZs), stations, metrorail network, and regions. The floor area ratio (FAR) was used to reflect the urban form, and spatial coordination model was introduced to examine the spatial balance between metrorail accessibility and urban forms. Results revealed that the spatial distribution of metrorail accessibility and urban form are characterized by a monocentric spatial structure, while the values of both variables decrease gradually from urban center to suburban regions, with the regional difference being significantly greater than the other three levels. The results also indicated that the development of metrorail stations has a time lag effect on the urban spatial form, and the catchment area of a metro station shows characteristics of gradually expanding and then shrinking from city center to suburban regions. Finally, the results showed that there is a strong coordination between accessibility and urban form around metro stations, but the coordinate degree varies by regions. Thus, we concluded that station density should be increased within the fourth ring, FAR should be increased between the second and third rings, and rail transit capacity in the urban center area should be increased.


2021 ◽  
Vol 15 ◽  
Author(s):  
Daniela Cernotova ◽  
Ales Stuchlik ◽  
Jan Svoboda

It is well known that communication between the medial prefrontal cortex (mPFC) and the ventral hippocampus (vHPC) is critical for various cognitive and behavioral functions. However, the exact role of these structures in spatial coordination remains to be clarified. Here we sought to determine the involvement of the mPFC and the vHPC in the spatial retrieval of a previously learned active place avoidance task in adult male Long-Evans rats, using a combination of unilateral and bilateral local muscimol inactivations. Moreover, we tested the role of the vHPC-mPFC pathway by performing combined ipsilateral and contralateral inactivations. Our results showed not only bilateral inactivations of either structure, but also the combined inactivations impaired the retrieval of spatial memory, whereas unilateral one-structure inactivations did not yield any effect. Remarkably, muscimol injections in combined groups exerted similar deficits, regardless of whether the inactivations were contralateral or ipsilateral. These findings confirm the importance of these structures in spatial cognition and emphasize the importance of the intact functioning of the vHPC-mPFC pathway.


Author(s):  
Miriam Niemeier ◽  
Manon Jeschke ◽  
Volker Dürr

Multi-legged locomotion requires appropriate coordination of all legs with coincident ground contact. Whereas behaviourally derived coordination rules can adequately describe many aspects of inter-leg coordination, the neural mechanisms underlying these rules are still not entirely clear. The fact that inter-leg coordination is strongly affected by cut thoracic connectives in tethered walking insects, shows that neural information exchange among legs is important. As yet, recent studies have shown that load transfer among legs can contribute to inter-leg coordination through mechanical coupling alone, i.e., without neural information exchange among legs. Since naturalistic load transfer among legs works only in freely walking animals but not in tethered animals, we tested the hypothesis that connective lesions have less strong effects if mechanical coupling through load transfer among legs is possible. To do so, we recorded protraction/retraction angles of all legs in unrestrained walking stick insects that either had one thoracic connective cut or had undergone a corresponding sham operation. In lesioned animals, either a pro-to-mesothorax or a meso-to-metathorax connective was cut. Overall, our results on temporal coordination were similar to published reports on tethered walking animals, in that the phase relationship of the legs immediately adjacent to the lesion was much less precise, although the effect on mean phase was relatively weak or absent. Lesioned animals could walk at the same speed as the control group, though with a significant sideward bias toward the intact side. Detailed comparison of lesion effects in free-walking and supported animals reveal that the strongest differences concern the spatial coordination among legs. In free walking, lesioned animals, touch-down and lift-off positions shifted significantly in almost all legs, including legs of the intact body side. We conclude that insects with disrupted neural information transfer through one connective adjust to this disruption differently if they experience naturalistic load distribution. While mechanical load transfer cannot compensate for lesion-induced effects on temporal inter-leg coordination, several compensatory changes in spatial coordination occur only if animals carry their own weight.


2021 ◽  
pp. 117-143
Author(s):  
Nigel Ostime
Keyword(s):  

2021 ◽  
Vol 273 ◽  
pp. 12037
Author(s):  
Natalia Shutova ◽  
Olga Suvorova ◽  
Svetlana Sorokoumova ◽  
Natalia Ivanova

The article presents a fragment of a research project devoted to studying the impact of the musical influence system on the mental development of mentally retarded children. The author’s approach to the criterion-oriented assessment of the levels of preschoolers’ psychomotor development is applied. Three estimated levels of children’s psychomotor development are used to assess both the actual features of this development and potential opportunities. The ascertaining experiment made it possible to reveal a significant motor impairment in mentally retarded children of theageof 6–7: difficulties in performing movements in accordance with the instructions; disorders of motor and spatial coordination; decreased motor memory; distortions of tempo, rhythm, and amplitude of movements (63.6%). The development program “Music and Dance of My Body” made it possible to actualize the children’s psychomotor potential through musical-motor improvisation. The program was aimed at developing a sense of rhythm, motor skills, forming correct posture, children’s expressive movements and facial expressions, spatial coordination. The program allowed increasing the percentage of children with an average level of psychomotor development from 33.9% to 57.0%. According to the results of the control stage, the dynamics of development were statistically significant at a high level of reliability (p = 0.001).


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