Feedback Control for Functional Electrical Stimulation of Paralyzed Muscle.
Abstract
An external harness containing six transducers was developed to provide position information from a cat's rear limbs. The front limbs rest in a sling apparatus while the rear legs are allowed to move in a straight line gait on a motorized treadmill. The aluminum members of the leg harness are nonivasively attached to the skeletal framework of the rear legs. The harness allows a relatively nonrestrictive forward and backward motion while limiting lateral movement of the leg. With the cat in the full harness system, the need for posture control during locomotion is eliminated because of the support system of the harness. During locomotion in the harness, electromyographic activity of the essential hindlimb muscles were recorded with the corresponding position information from the harness. These data along with anatomical models of the leg allowed isolation of six 'essential' muscles: iliopsoas, semimembranosus, vastus lateralis, biceps femoris, tibialis anterior, and gastrocnemius. Using only these six muscles, locomotion can theoretically be achieved while the cat is in the harness system. From the EMG data, initial activity of the essential muscles during locomotion was obtained and plotted against the cat step cycle. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1981
- Accession Number
- ADA098943
Entities
People
- Cory D. Carroll
Organizations
- Air Force Institute of Technology