Kinesiology 2241A/B Lecture 7: Lecture #7- Neuromuscular #2

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

Document Summary

Or really two diretions by which information flows: afferent nerves (also called sensory nerves) carry information to the central nervous system, efferent nerves ( also called motor nerves) carry information from the central nervous system. Surface emg: surface emg signal is a summation of 1000s of aps in the muscle fibers, multiple muscles can be tacked simultaneously to record the sequencing of muscles activation. Slow to contract but very fatigue resistant: type 2a, fast twitch, oxidative fibers. Fast to contract but fatigue resistant: type 2b, fast twitch, glycolytic fibers. Fast to contract, fast to fatigue when glycogen runs out. "true fast twitch: elastic storage of energy, muscle attach to the bone via tendons that are elastically "stretchy, the tendons are continuous structures with the perimysium within the muscle belly. This is also "stretchy: so when the muscle-tendons structure is stretched, there is elastic energy stored in the tissue that is released when the muscle shortens again.