Fallen fragment sign

A 16-year-old boy presented at the emergency room after he fell on his left shoulder while playing American football. Plain radiographs showed a pathological fracture through a well- defined expansile radiolucent lesion within the proximal meta-diaphysis of the left humerus (Fig. A). The lesion caused cortical thinning and contained multiple linear cortical fragments within the central part of the lesion (arrows in Fig. A). Based on the age, location and the plain radiographic characteristics (“fallen fragment sign”), the diagnosis of a solitary bone cyst (SBC) was suggested

Effects of Flywheel Training on Strength-Related Variables : a Meta-analysis.

BACKGROUND: Strength and power development are abilities important for athletic performance in many sports. Generally, resistance training based on gravity is used to improve these qualities. Flywheel training instead utilizes kinetic energy transferred to a flywheel. This allows for eccentric overload and variable resistance throughout the movement. The aim of this review was to identify the effects of flywheel training on multiple strength-related variables affecting athletic performance. The meta-analysis investigates the effects on (1) muscle growth (cross-sectional area (CSA) and volume/mass), (2) maximum dynamic strength, (3) development of power, (4) development of horizontal movement, and (5) development of vertical movement. METHODS: The meta-analysis includes 20 experimental studies that met the inclusion criteria. The quality of included studies was ranked according to the PEDro scale. Possible bias was identified in Funnel plot analyses. To enable the compilation of all results analyses, the random effect model was carried out using the software Review Manager Version 5.3 and presented with Forest plots. RESULTS: Flywheel training for a period of 4-24 weeks shows statistically significant increases in all strength aspects. Effect sizes were for hypertrophy, CSA 0.59; volume/mass 0.59; maximum strength 1.33; power 1.19; horizontal 1.01 and vertical movement 0.85. The evidence is particularly strong for beneficial effects from flywheel training in the development of maximal strength and power in trained younger individuals, and utilization of this training modality in shorter more intensive blocks. CONCLUSIONS: Flywheel training is an effective method for improving several aspects of strength and power with importance for sports performance

Constructional change in Old and Middle English Copular Constructions and its impact on the lexicon

Applying the framework of Radical Construction Grammar to diachronic phenomena, the present paper examines Copular Constructions in Old and Middle English, with special attention to the loss of the Copula weorðan ‘become’. First we reconstruct the extension of the OE Verbs is, beon, weorðan and becuman to various types of Copular Constructions. We further argue that schematic Copular Constructions emerge in overlapping usage areas resulting from these developments, in which abstraction is made of the Copulas' particular aspectual semantics. These schematic Copular Constructions in turn undergo some changes themselves. In Middle English a Passive Construction developed out of an original Copula Construction involving Adjectival Participles. However, the constructional profile of weorðan comprised an association between Participial and Adjectival Subject Complements much stronger than in other copulas, and this conflicted with this development, with the archaisization of weorðan as a result. This process of archaisization was further strengthened by the takeover of Weak Verbs in -ian (type ealdian ‘become old’) by new copulas like becuman. In general, we show how diachronic construction grammar might account for the loss of a function word otherwise difficult to account for.3H05117