Lecture 22 - Muscle Mechanics Bio416K Spring 2010

Lecture 22 - Muscle Mechanics Bio416K Spring 2010 -...

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LA EA (R) Classes of Lever Systems in the Body
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Classes of Lever Systems – Triceps brachii m. L Effort
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Arm is a Lever and Fulcrum System (EA) (RA) (RA) x (R f ) = (EA) x (E f ) (25 cm) x (7 kg) = (5 cm) x (E f ) 175 kg-cm = (5 cm) x (35 kg) E f = 35 kg * if EA is 6 cm, E f is 29 Kg
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Arm Amplifies Speed of Movement of the Load
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Series Elastic Elements in Skeletal Muscles 1. Elastic fibers in tendons 2. Elastic components of sarcomere 3. Contractile filaments can stretch behave as they were connected in series
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Isotonic and Isometric Contractions
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Unformatted text preview: Isotonic Contractions Muscle length (% of resting) 100 -70 -Time Isometric Contractions Muscle length (% of resting) 100 -70 -Time Monosynaptic and Polysynaptic Somatic Motor Reflexes Muscle Spindles and Golgi Tendon Organs Muscle Spindles Relaxed Muscle Muscle Spindles Stretched Muscle Alpha-gamma Coactivation Muscle Spindle Reflex and Golgi Tendon Reflex Patellar Tendon Reflex Flexion Reflex and Crossed Extensor Reflex...
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Lecture 22 - Muscle Mechanics Bio416K Spring 2010 -...

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