THE MUSCLE TWITCH

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THE MUSCLE TWITCH

• LATENT PERIOD
• CONTRACTION PERIOD
• RELAXATION PERIOD

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GRADED CONTRACTIONS

• All or none response THE MYOFIBER
• Multiple Motor Unit Summation Spatial Summation
• Muscle Tone

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• Wave Summation Temporal Summation
• Incomplete Tetanus
• Complete Tetanus

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• Asynchronous motor unit summation
• Treppe

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• Isotonic Contraction

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• Isometric Contraction

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Types of Skeletal Muscle Fibers

• Slow Twitch Fibers
• Fatigue resistant
• Red blood
• Myoglobin
• Mitochondria geared towards aerobic metabolism

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• Intermediate Fibers

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• Fast Twitch Fatiguable
• Glycogen
• No myoglobin
• White
• Geared towards anaerobic metabolism