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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