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H.A.P. Anatomy
Muscular Sys. Lesson 1
| Isometric Contraction | Muscle contraction without joint movement |
| Reversal of muscle action | The origin of the contacting muscle moves toward the insertion |
| Isokinetic Contraction | Constant speed with variable resistance / Constant tension of a muscle |
| Assisting mover/ Synergist | Not as powerful as the prime mover/ A muscle that works with one or more other muscles to enhance a particular motion |
| Tone | Slight tension is a muscle |
| Normal Resting Length | Position when muscle is unstimulated |
| Irritability | Ability to receive and respond to a stimulus |
| Contractility | Ability to produce tension |
| Extensibility | Ability to be stretched beyond normal resting length |
| Elasticity | Ability to return to normal length |
| Lengthening contraction is an ex. of | Eccentric Contraction |
| Shortening contraction is an ex. of | Concentric Contraction |
| Insertion moves towards origin is an ex. of | Concentric Contraction |
| Insertion moves away from origin is an ex. of | Eccentric Contraction |
| Muscle contraction moves the body segment against gravity is an ex. of | Concentric contraction |
| Muscle contraction slows the pull of gravity on the body | Eccentric contraction |
| Prime mover/ Agonist | the muscle or muscle group that causes the motion |
| Synergist/Assisting mover | a muscle that works with one or more other muscles to enhance a particular motion |
| Antagonist | the muscle that performs the opposite motion of the agonist |
| Cocontraction | When the antagonist contracts at the same time as the agonist (similar to isometric contraction) |
| Concentric | a muscle contracts and shortens |
| Eccentric | a muscle lengthens as it maintains tension |
| Muscles pull _______________ their origin | toward |
| Closed kinetic chain | requires that the distal segment is fixed (closed) and the proximal segmen(s) moves / weight - bearing |
| Open kinetic chain | the distal segments are free to move while the proximal segments remain stationary |
| Origin | Bony attachment site that is relatively stationary/ beginning |
| Insertion | Bony attachment site that is relatively mobile/ end |
| With a few exceptions, all skeletal muscles cross at least... | one joint |
| Typically, the bulk of a skeletal muscle lies proximal to ... | the joint crossed |
| All skeletal muscles have at least ___________ attachments | two |
| Skeletal muscles can only ________ they never ___________ | Pull... push |
| During contraction, skeletal muscles _________ moves towards the ______________ | insertion... origin |
| Active insufficiency | when a muscle cannot contract any further |
| Passive insufficiency | when a muscle cannot be elongated any further |
| Muscle fibers in either _____________ or _____________ pattern which favors range or power respectively | Parallel... Oblique |
| Muscle tissue has the properties of... | irritablity, contractility, extensibility, and elasticity |
| Muscle contraction types are... | isometric, concentric, eccentric |
| The role of a muscle depends on the situation. The four roles are... | agonist, antagonist, stabilizer, or neutralizer |
| Kinetic chain movement depends on whether the distal segment is ... | fixed or free to move (closed or open) |
Created by:
AdrienneBronner
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