Jerald M. Henderson

Viscosity of the flexor muscles of the elbow joint under maximum contraction condition

The maximum contractile moments developed by the elbow flexors of eleven normal subjects at different elbow angles were measured, both isometrically and at various shortening velocities. The results were used to predict the damping coefficient of the viscous element of the elbow flexor muscles and soft tissue under maximum contraction condition for various angles and shortening velocities.

Toward quantification of athetotic movements by frequency spectrum analysis

The frequency spectrum of the elbow movements of one normal subject and six handicapped subjects were obtained in order to investigate the possibility of using this technique in quantifying athetosis. The frequency spectrum technique appears to be useful but data from more subjects must be obtained and specific details regarding scaling need to be investigated.

Determination of the parameters for an athetotic arm model

A model is developed to represent elbow motions of a cerebral palsied arm with athetotic movements. The parameters of the model are defined and determined. The resulting computer model can then be used to either generate athetotic motions or to regenerate prerecorded experimental data.

Design of an intraosseous infusion system

To reduce the emergency treatment time of shock victims, resuscitation fluids can be infused into a patient via their sternum rather than through a peripheral vein. Successful use of this method requires manual infusion because available medical equipment is not capable of infusing the preferred resuscitation fluids into the sternum at the required flow rates. This article describes the process and results of the design of a high pressure infusion system specifically intended for automating emergency sternal infusions. Infusion requirements for the human sternum were clearly defined, and were followed by the development and evaluation of many infusion system ideas, including numerous commercially available pump designs. The options were narrowed down to five schemes that were studied in depth. Finally, two schemes were picked, a compressed gas bag-within-a-bag design and a peristaltic design.

A mechanism to convert uniform rotation to linear sinusoidal motion

Abstract The mechanism to be discussed here does the same thing as a Scoth yoke, but in a different manner. The only slider of this mechanism moves in the line of hte linear sinusidal motion. Consequently, when the mechanism transmits forces of appreciable magnitudes, it is not affected as much by wear and the resulting slap as is the transverse slider of a Scoth yoke.