Unit 2: Muscular System Pt 2 PDF
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Uploaded by MonumentalConnemara2180
Boston College
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Summary
This document provides information on the muscular system, including different fiber types, fascicle orientation, and myotomes. It's a great resource for understanding the organization and function of muscles in the human body.
Full Transcript
Unit 2: Muscular System Pt 2 Objectives Differentiate between Type 1 and Type 2 fibers Identify major myotomes in the human body Fascicle Orientation Parallel - fascicles oriented in the same direction as the long axis of the muscle ○ Majority of skeletal muscle Circular...
Unit 2: Muscular System Pt 2 Objectives Differentiate between Type 1 and Type 2 fibers Identify major myotomes in the human body Fascicle Orientation Parallel - fascicles oriented in the same direction as the long axis of the muscle ○ Majority of skeletal muscle Circular - circular orientation Convergent - muscles with a large origin that converge on a narrow insertion Pennate - central tendon that runs through the muscle ○ Don’t produce a lot of movement but do produce a large amount of force Fiber Type Slow Twitch (Type 1) ○ Fatigue resistant ○ More mitochondria and myoglobin ○ Aerobic pathway Fast Twitch (Type 2) ○ Fatigues quickly but can more larger forces ○ Two Subtypes Type 2X: Produce most force but inefficient Relies heavily on anaerobic pathway Type 2A: Intermediate between Type 2 and Type 1 Terms Myotome: ○ Group of muscles innervated by a single nerve route
