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The function of selected upper limb musculature during delivery and follow-through of the overhand throw /Stewart, Campbell S. January 1979 (has links)
No description available.
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The function of selected upper limb musculature during delivery and follow-through of the overhand throw /Stewart, Campbell S. January 1979 (has links)
No description available.
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Contributions of selected muscles to the dynamic stability of the medial aspect of the elbowLeddon, Charles 10 December 2003 (has links)
The ulnar collateral ligament (UCL) is the primary restraint against valgus forces
at the elbow. This structure cannot support the entire load placed upon the medial elbow
during overhand throwing motions such as pitching a baseball. In this study we measured
the contributions that different muscle groups make to the stability of the medial elbow,
under conditions intended to reproduce the loads during pitching by varying the forearm
position and loading conditions. We also evaluated the strength of the elbow musculature
for the possibility of a training effect in the dominant arm of 11 male high school baseball
pitchers. We collected surface EMG data in the two forearm positions to determine if the
different positions used in various pitches have an effect on muscular action. We also
tested an isometric and dissipative loading condition to determine if the muscles activity
was load reactive. The four muscle groups tested were the flexor-pronator group (FP), the
extensor-supinator group (ES), the tricep brachii (TB), and the pectoralis major (PM).
We found significantly (p-value=0.001) higher peak activity levels of the flexor-pronator
group in the neutral forearm position (79.4% MVIC �� 27.0% MVIC full trial
peak, 30.8% MVIC �� 20.8% MVIC initial l50ms peak following activation) when
compared to the supinated position (55.5% MVIC �� 29.6% MVIC full trial peak, 16.9%
MVIC �� 14.8% MVIC initial l50ms peak following activation), which may explain the
link between breaking pitches and medial elbow injury. We found an increase (p-value=0.001) in force output of the dominant arm (49.3 N/kg �� 12.5 N/kg) over the non-dominant
arm (38.1 N/kg �� 11.0 N/kg). This finding is attributed to a training effect,
which assists in protecting the elbow. These findings help provide baseline muscle
activity information on protection of the medial soft tissue structures of the elbow. / Graduation date: 2004
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A model for the generation and study of electromyographic signalsLerman, David 05 December 1991 (has links)
A computer model simulating the electrical activity of muscles of the upper
arm during elbow motion is presented. The output of the model is an
Electromyographic (EMG) signal. System identification is performed on the EMG
signals using autoregressive moving average (ARMA) modelling. The calculated
ARMA coefficients are then used as the feature set for pattern recognition.
Pattern recognition is performed on the EMG signals to attempt to identify which
of four possible motions is producing the signal. The results of pattern recognition
are compared with results from pattern recognition of real EMG signals. The
model is shown to be useful in predicting general trends found in the real data, but
is not robust enough to predict accurate quantitative results. Simplifying
assumptions about the filtering effects of body tissue, and about the size and
position of muscles, are conjectured to be the most likely reasons the model is not
quantitatively accurate. / Graduation date: 1992
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The day-to-day variability of oxygen uptake during submaximal arm ergometryMontain, Scott J. 03 June 2011 (has links)
Ball State University LibrariesLibrary services and resources for knowledge buildingMasters ThesesThere is no abstract available for this thesis.
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