Bioseb News and Events - Our last news: Dynamic Weight Bearing

Chers lecteurs,
C'est avec plaisir que nous vous présentons la newsletters Bioseb du mois de mai 2008.
Vous y découvrirez de nouvelles applications pour l'enseignement supérieur ainsi qu'un tutorial trés complet pour les travaux pratiques de physiologie humaine ayant pour thème la stimulation des muscles antagonistes chez l'homme. Bioseb propose dans ce cadre, une suite complète d'unités d'acquisition et de capteurs avec un vaste choix de tutoriaux pour répondre aux divers besoins des cycles universitaires.Toutes vos questions et demandes spécifiques seront les bienvenues, nous y repondrons avec le plus grand intérêt.

En espérant vous compter bientôt parmis nos fidèles utilisateurs.

Sincères salutations
L'equipe Bioseb.

PS: retrouvez toutes nos nouveautés en physiologie et pharmacologie in vivo sur www.bioseb.com

Dans ce numéro:

- Stimulation of
Antagonistic Muscles
Experiment
- SI-200 Stimulus Isolator
Tech Note
- User Downloads
- Web Resources
- New LabsByDesign
Custom Physiology Labs

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The iWorx newsletter is a FREE monthly publication dedicated to sharing teaching laboratory techniques and other useful information with educators in the fields of Anatomy and Physiology. We will also be sending you technical information and info on new developments at iWorx that we feel may be of use to you in your teaching and research activities.

About iWorx
iWorx has everything you need to add excitement and distance learning to any physiology teaching program. Our products include data acquisition hardware, professionally -developed physiology courseware, innovative web tools, and a full selection of transducers, cables, front ends and accessories.

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Mai 2008

Experiment: Stimulation of Antagonistic Muscles

While walking or running, the muscles of the lower leg work in a coordinated manner to position the foot at the proper angle during each segment of a person’s stride. As the leg is moved forward after a step has been taken, the foot moves upward in a dorsiflexion caused by the contraction of the tibialis anterior muscle on the front of the lower leg. Dorsiflexion provides the foot greater clearance from the ground as the foot is moved forward. When the foot is planted and the person’s body is being propelled forward, the foot moves downward in a plantar flexion caused by the contraction of the gastrocnemius muscle on the back of the lower leg. Plantar flexion helps push the body forward as the leg is moved backward.

In this experiment, dorsiflexion and plantar flexion will be triggered by stimulation of the muscles involved in each flexion. When stimulated, each muscle generates a compound muscle action potential, known as a M-wave, which will be recorded like an electromyogram (EMG). Each M-wave generates a muscle contraction, which causes a flexion. The range of motion of each flexion will be measured with a single-axis goniometer. The frequency of stimulation of the muscles will also be increased to demonstrate the effect of mechanical summation on the overall range of motion of the foot.

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Tech Note: SI-200 Isolated Stimulator

The SI-200 is a high voltage, isolated stimulator designed to deliver safe, transcutaneous stimulus pulses to a nerve or a muscle being studied. The design of the SI-200 permits the desired current of the stimulus pulse to be generated despite the impedance on the path that the current follows. The SI-200 adjusts the voltage needed to maintain that current automatically by increasing the voltage that drives the current up to a maximum of 150 volts. Because of this capability, the SI-200 is categorized as a constant current stimulator. However, the current output of the SI-200 is limited to a maximum of 20 milliamperes, with a maximum duration of 10 milliseconds and a maximum frequency of 50Hz.

SI-200 Stimulus Isolator

Learn more about the iWorx SI-200 Stimulus Isolator here, or view a Tech Note here.

Unité d'enseignement pour l'acquisition de donnée IX214

Download the Updated Settings File for this Month's Experiment with LabScribe2^TM Software

If iWorx users plan to use the Flexibility and Range of Motion experiment in their course, they can obtain a copy of the settings file used to configure the LabScribe2 recording software to do this experiment by clicking here (zip file).

To learn how to create your own groups of settings files for use with LabScribe2, click here. The new Settings Manager in LabScribe2 permits numerous pieces of support material to be linked to a settings file and opened automatically when the settings file is selected from the Settings menu. In LabScribe2, animations, illustrations, movies, websites, experimental write-ups, and more can be opened automatically when a settings file is opened.

Web Resources

Find more sources of articles about gait analysis and foot movement and range of motion by going to the external Web resources page.

On this page we have also accumulated a host of links to informative, external physiology Web sites and conveniently categorized them into major subcategories for easy reference.

Introducing iWorx LabsByDesign^TM: Design the Physiology Labs that Best Suit Your Needs.

iWorx new LabsByDesign is the easiest and most cost effective way for you to design the physiology teaching labs that perfectly fit your needs. It's a unique alternative to the one size fits all, canned approach to standard lab systems that force you to purchase equipment you don't need and will never use.

Use the Web-based LabsByDesign configurator and choose the labs you want to teach. The configurator will then tailor the necessary components from our complete line of data recording modules, sensors, electrodes, stimulators and other accessories along with the courseware necessary to support the experiments you select.

Start here to design your own lab today.

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