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Published byMaria Chambers Modified over 8 years ago
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FUNTIONAL ANATOMY FOCUS QUESTION 2. Explain the relationship between anatomical structure and the performance of a physical activity.
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Agonists & Antagonists
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As muscles contract and shorten they pull the bones they are connected to
This allows movement to occur over the joint
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The contracting muscle that causes the movement over the joint is known as the agonist (prime mover)
The muscle that relaxes to allow movement to occur on the other side of the joint is known as the antagonist
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MUSCLE PAIRS Muscles always work in pairs. This is because they can only pull on bones. As one muscle pulls, the other relaxes Biceps brachii – Triceps brachii Gastrocnemius – Tibialis Anterior Quadriceps – Hamstrings Gluteus Maximus – Ilio Psoas (groin muscle) Anterior Deltoid/Pectoralis Major – Latissimus Dorsi
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Knee Flexion & Extension
During knee flexion: Hamstring = agonist Quadriceps = antagonist During knee extension: Quadriceps = agonist Hamstrings = antagonist
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Quadriceps = agonist Hamstrings = antagonist
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Activity Joint Action Agonist Antagonist Leg Press Knee
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Activity Joint Action Agonist Antagonist Leg Press Elbow
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Activity Joint Action Agonist Antagonist Bicep Curl Elbow
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2 1 1) Joint Action Muscle 2) Joint
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Activity Joint Action Agonist Antagonist
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1) Joint Action Muscle 2) Joint Ankle Knee 3) Joint Action Muscle Hip
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