Live support
Live Chat is only available M - F from 9:00 am to 4:00 pm EST time.

If you need immediate help please fill out the form below or email
us at

Text size: A A A

Motion Analysis Center

The Motion Analysis Center (MAC) promotes independence for people with gait and movement disorders through objective analysis, education, and research. The MAC is Michigan's leader in computerized gait analysis, serving patients from all areas of the state who have neuromuscular disorders. We use state-of-the-art technology to objectively measure complex joint movements and muscle activity patterns and forces acting on the body during walking.

Mary Free Bed's Motion Analysis Center

We provide a comprehensive description of how the patient's body moves during walking compared to age-appropriate normal walking patterns. The interpretation of the data can be used by referring physicians to determine the best possible treatment plan for the patient.

Motion Analysis Center Services

The study takes 3-4 hours and includes several components, though not all components will be necessary for every patient.

Components may include:
Split-screen videotaping
Detailed physical assessment
Plantar pressure analysis
Surface electromyography
3-D joint motion and forces
Temporal/spatial gait parameters
Written report with recommendations

Motion Analysis Center Facilities

The Motion Analysis Center is located on Level 3 of the Mary Ives Hunting Center on the campus of Mary Free Bed Rehabilitation Hospital. The MAC uses 10 special high-speed cameras with a computerized data capture system that integrates motion, force, and electromyographic data. Cameras are wall mounted around the 1,500-square-foot testing area.

Contact the Motion Analysis Center


Motion Analysis Center Referral Form

Motion Analysis Center Services Explained

Split-screen videotaping
Two digital video cameras (side and front views) simultaneously record the patient walking. A copy of this video accompanies the report to referring physician.

Detailed physical assessment
Our physical therapist performs a comprehensive assessment of the lower extremities, including muscle strength and control, muscle length, joint motion, spasticity, bony torsion, balance, and overall posture.

Plantar pressure analysis
The patient walks over a thin mat that electronically measures the pressures under the foot.The color-coded footprints created in the computer identify the areas of highest and lowest pressure.

Surface electromyography
Sensors (electrodes) are taped to the patient's skin over particular muscles important in walking. The computer records when muscles are active during walking.  A fine wire EMG study is also available on request.

3-D joint motion and forces
Small reflective markers are taped to the patient's feet, legs, and trunk. Ten state-of-the-art, high- speed video cameras record the motion of these markers as the patient walks down a designated walkway. Before leaving, patients see the 3-D model of their own walk on the computer.

Temporal/Spatial gait parameters
These include basic features of gait such as walking speed, stride length, cadence and step width.

Written report with recommendations
All information gathered in the evaluation is processed and interpreted by a highly qualified, interdisciplinary team of professionals.The referring physician is sent a video/DVD and detailed written report, including the data, a summary/interpretation, and recommendations. This information assists referring physicians in establishing a treatment plan for the patient. Physicians can expect to see results approximately three weeks following the test.

(Back to top)


© 2015 Mary Free Bed Rehabilitation Hospital., Grand Rapids, MI | 1.855.MFB.REHAB
Powered by Kentico CMS