View Full Version : Radial nerve block and throwing ref - found

05-10-2004, 02:46 PM
Well, it took a while, but I have finally traced down the reference to the
“radial nerve block in a thrower reference”.

I think most people have seen it in a paper by Feltner and Dapena (Feltner,
M. and J. Dapena (1986). "Dynamics of the shoulder and elbow joints of the
throwing arm during a baseball pitch." International journal of sport
biomechanics 2(4): 235-259.) where on page 256, it’s written:

“In any case, the small magnitude of the extension torque at the elbow joint
suggests that the acceleration of the ball may ultimately due primarily to
the actions of muscles other than the elbow extensors. This would be
consistent with the findings of Dobbins (reported by Roberts, 1971). Dobbins
used a differential nerve block to paralyze triceps activity. After six
practice trials, the subject was able to throw the ball at over 80% of the
speed attained prior to the paralyzation of the triceps.”

The Roberts reference is:

Roberts, T.W. (1971) Cinematography in biomechanical investigation: selected
topics in biomechanics. In: Cooper, J.M. editor. Proceedings of the CIC
Symposium on Biomechanics. Chicago: Athletic Institute, 41-50.

Unfortunately I have no idea regarding the work of the elusive Dobbins.

Thanks again to all those who helped with the mystery.

Rod Whiteley

University of Sydney

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