Kinesiology 2241A/B Lecture 6: Lecture #6- Neuromuscular #1

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2241A/B
• Professor: Thomas Richard Jenkyn

Document Summary

Reminder: tendons connect muscle to muscle (with exceptions like patellar tendons) Layers of muscle: each muscle is a coil on a coil, the layers, muscle (covered by epimysium, fascicles (covered by perimysium, muscle fibers (covered by endomysium) Smallest muscle component: myofibrils, connective tissue attached to the muscle end is quite strong , the majority of tears occur at tissue to bone connection. Small pennation: tibialis anterior (5 degrees, large excursion, small force, easily fatigued. Large pennation: gastrocnemius (30 degrees, small excursion, large force, good endurance, pennation arrangements. Isometric contraction: the muscle is activated and remains the same length. Muscle has an "ideal length" at which maximum tension is produced. Tension drops off if it is longer or shorten than this length: the speed of muscle. This is the velocity-tension curve for a muscle. As the muscle shortens faster its tension drops quickly. When a muscle is lengthening (eccentric contraction) the tension goes up!