A new unsupervised method for the segmentation of rodent whole-body dynamic PET images: Comparison to other methods

Author(s):  
Renaud Maroy ◽  
Claude Comtat ◽  
Regine Trebossen ◽  
Bertrand Tavitian
2008 ◽  
Vol 27 (3) ◽  
pp. 342-354 ◽  
Author(s):  
R. Maroy ◽  
R. Boisgard ◽  
C. Comtat ◽  
V. Frouin ◽  
P. Cathier ◽  
...  

Author(s):  
Sébastien Ratel ◽  
Craig A Williams

Scientific evidence supports the proposition that prepubertal children fatigue less than adults when performing whole-body dynamic activities like maximal cycling, running bouts, and maximal voluntary isometric/isokinetic muscle contractions. Although the mechanisms underpinning differences in fatigue between children and adults are not all fully understood, there is a consensus that children experience less peripheral fatigue (i.e. muscular fatigue) than their older counterparts. Central factors may also account for the lower fatigability in children. Some studies report a higher reduction of muscle voluntary activation during fatiguing exercise in prepubertal children compared to adults. This could reflect a strategy of the central nervous system aimed at limiting the recruitment of motor units, in order to prevent any extensive peripheral fatigue. Further studies are required to clarify this proposition.


Author(s):  
Atushi Nakano ◽  
Hidekazu Kawashima ◽  
Yosinori Miyake ◽  
Tatsuya Sawamura ◽  
Hidehiro Iid

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