the muscular system: agonists and antagonists
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Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Human Anatomy & Physiology, Sixth EditionElaine N. Marieb
PowerPoint® Lecture Slides prepared by Vince Austin, University of Kentucky
10The Muscular System: Agonists and Antagonists
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
What does a muscle’s name tell us?
Name and description of the muscle – sometimes in name itself (Example: occipitalis)
Origin and insertion – there is always a joint between the origin and insertion (Example: biceps brachii – origin has two heads, crosses elbow distal to upper arm)
Action – easy to remember it by acting out a muscle’s movement on your own body (Example: extensor carpi digitorum)
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Example: Muscles Crossing the Elbow
Forearm extension
The triceps brachii is the prime mover of forearm extension
Forearm flexion
Brachialis and biceps brachii are the chief forearm flexors
The brachioradialis acts as a synergist and helps stabilize the elbow
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Major Skeletal Muscles: Anterior View
The 40 superficial muscles here are divided into 10 regional areas of the body
Figure 10.4b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Posterior View
The 27 superficial muscles here are divided into seven regional areas of the body
Figure 10.5b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Quiz
Number notebook paper 1-10
You may use your notes
For each picture, name one agonist muscle (one that contracts) and one antagonist muscle (one that relaxes)
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1. Example
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1. Example
Agonist: Biceps brachii
Antagonist: Triceps brachii
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2.
Agonist:
Antagonist:
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3.
Agonist:
Antagonist:
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4.
Agonist:
Antagonist:
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5.
Agonist:
Antagonist:
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6.
Agonist:
Antagonist:
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7.
Agonist:
Antagonist:
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8.
Agonist:
Antagonist:
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9.
Agonist:
Antagonist:
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10.
Agonist:
Antagonist:
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Share answers
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
2.
Agonist:
Antagonist:
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Anterior View
The 40 superficial muscles here are divided into 10 regional areas of the body
Figure 10.4b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Posterior View
The 27 superficial muscles here are divided into seven regional areas of the body
Figure 10.5b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
3.
Agonist:
Antagonist:
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Anterior View
The 40 superficial muscles here are divided into 10 regional areas of the body
Figure 10.4b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Posterior View
The 27 superficial muscles here are divided into seven regional areas of the body
Figure 10.5b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
4.
Agonist:
Antagonist:
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Anterior View
The 40 superficial muscles here are divided into 10 regional areas of the body
Figure 10.4b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Posterior View
The 27 superficial muscles here are divided into seven regional areas of the body
Figure 10.5b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
6.
Agonist:
Antagonist:
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
5.
Agonist:
Antagonist:
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Anterior View
The 40 superficial muscles here are divided into 10 regional areas of the body
Figure 10.4b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Posterior View
The 27 superficial muscles here are divided into seven regional areas of the body
Figure 10.5b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Anterior View
The 40 superficial muscles here are divided into 10 regional areas of the body
Figure 10.4b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Posterior View
The 27 superficial muscles here are divided into seven regional areas of the body
Figure 10.5b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
7.
Agonist:
Antagonist:
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Anterior View
The 40 superficial muscles here are divided into 10 regional areas of the body
Figure 10.4b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Posterior View
The 27 superficial muscles here are divided into seven regional areas of the body
Figure 10.5b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
8.
Agonist:
Antagonist:
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Anterior View
The 40 superficial muscles here are divided into 10 regional areas of the body
Figure 10.4b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Posterior View
The 27 superficial muscles here are divided into seven regional areas of the body
Figure 10.5b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
9.
Agonist:
Antagonist:
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Anterior View
The 40 superficial muscles here are divided into 10 regional areas of the body
Figure 10.4b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Posterior View
The 27 superficial muscles here are divided into seven regional areas of the body
Figure 10.5b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
10.
Agonist:
Antagonist:
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Anterior View
The 40 superficial muscles here are divided into 10 regional areas of the body
Figure 10.4b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Major Skeletal Muscles: Posterior View
The 27 superficial muscles here are divided into seven regional areas of the body
Figure 10.5b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Give yourself a grade you think is fair
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Tomorrow
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Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
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