Analytical Monitoring of Brain Metabolism: Not a Research Tool for Elite Academy but an Essential Issue for Return to Play Following Concussion

2021 ◽  
pp. 193-220
Author(s):  
Stefano Signoretti ◽  
Francesco Saverio Pastore ◽  
Barbara Tavazzi ◽  
Giuseppe Lazzarino ◽  
Roberto Vagnozzi
Author(s):  
Willem H.J. Andersen

Electron microscope design, and particularly the design of the imaging system, has reached a high degree of perfection. Present objective lenses perform up to their theoretical limit, while the whole imaging system, consisting of three or four lenses, provides very wide ranges of magnification and diffraction camera length with virtually no distortion of the image. Evolution of the electron microscope in to a routine research tool in which objects of steadily increasing thickness are investigated, has made it necessary for the designer to pay special attention to the chromatic aberrations of the magnification system (as distinct from the chromatic aberration of the objective lens). These chromatic aberrations cause edge un-sharpness of the image due to electrons which have suffered energy losses in the object.There exist two kinds of chromatic aberration of the magnification system; the chromatic change of magnification, characterized by the coefficient Cm, and the chromatic change of rotation given by Cp.


2012 ◽  
Vol 13 (3) ◽  
pp. 70-78 ◽  
Author(s):  
Bess Sirmon-Taylor ◽  
Anthony P. Salvatore

Abstract Purpose: Federal regulations should be implemented to provide appropriate services for student-athletes who have sustained a concussion, which can result in impaired function in the academic setting. Eligibility guidelines for special education services do not specifically address the significant, but sometimes transient, impairments that can manifest after concussion, which occur in up to 10% of student-athletes. Method: We provide a definition of the word concussion and discuss the eligibility guidelines for traumatic brain injury and other health-impaired under IDEA, as is the use of Section 504. Results: The cognitive-linguistic and behavioral deficits that can occur after concussion can have a significant impact on academic function. We draw comparisons between the clinical presentation of concussion and the eligibility indicators in IDEA and Section 504. Conclusion: Speech-language pathologists are well-positioned to serve on concussion management teams in school settings, providing services including collection of baseline data, intervention and reassessment after a concussion has occurred, prevention education, and legislative advocacy. Until the cultural perception of concussion changes, with increased recognition of the potential consequences, student-athletes are at risk and appropriate implementation of the existing guidelines can assist in preservation of brain function, return to the classroom, and safe return to play.


1970 ◽  
Vol 126 (5) ◽  
pp. 831-834 ◽  
Author(s):  
S. Van den Noort
Keyword(s):  

2006 ◽  
Author(s):  
Claudia Armbruster ◽  
Marc Wolter ◽  
Jakob T. Valvoda ◽  
Torsten Kuhlen ◽  
Will Spijkers ◽  
...  

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