ABSTRACT
The aim of this study was to investigate the correlation of wrist extension strength (WES) and grip strength (GS) using a radial nerve block, and to determine the WES required to prevent the "wrist flexion phenomenon" (antagonistic WES) when making a fist. We tested 14 arms in seven healthy males. WES and GS were measured before blocking as standard WES and standard GS. All participants then had radial nerve blocks with mepivacaine hydrochloride. During the recovery process from radial nerve blockade, WES and GS were recorded every 5 minutes. There was a very strong correlation between WES and GS (p < 0.0001). The mean antagonistic WES was 51% of standard WES, and the mean GS, recorded at the same time, was 66% of standard GS.
Subject(s)
Hand Strength/physiology , Wrist Joint/physiology , Adult , Electromyography , Female , Humans , Male , Muscle Strength Dynamometer , Nerve Block , Radial NerveABSTRACT
The angular distribution of light reflected from a blackened aluminum matte plate was studied as a function of illumination for several degrees of castor-oil wetting. The results were compared with a theory based on geometrical optics and simple models of the matte surface. The theory and the experiment agree and provide an understanding of the effect of the underlying surface on its glossiness.
