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21 Cards in this Set

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  • Back
Origin
anchor point of agonist; attachment of a muscle that remain relatively fixed during muscular contraction
Insertion
Point of movement of agonist; moveable attachment of muscle
agonist
Generate specific movement
antagonist
oppositional modulation movement
Synergist
additional effort to support antagonist
fixator
stabilze origin of agonist
fulcrum
part of the lever system; the fixed point
First-class Lever
the fulcrum is in the middle
Second Class Lever
the load is in the middle
Third - Class Lever
the effort is in the middle
What are 5 ways muscles are named
Location
Shape
Orientation
Number of heads
Action
Mechanical Advantage
power lever; Condition that occurs when the load is close to the fulcrum and the effort is applied far from the fulcrum; allows a small effort exerted over a relatively large distance to move a large load over a small distance
Mechanical Disadvantage
Speed Lever - condition that occurs when the load is far from the fulcrum and the effort is applied near the fulcrum; the effort applied must be greater than than the load to be moved
epimysium
sheath of fibrous connective tissue surrounding a muscle
perimysium
Connective tissue enveloping bundles of muscle fibers
fascicle
bundles of nerve or muscle fibers bound together by connective tissue
Direct Attachment
called a fleshy attachment) is where the perimysium and epimysium
of the muscle unite and fuse with the periosteum of a bone, perichondrium of a cartilage, a joint capsule,
or the connective tissue underlying the skin
Tendon
cord of dense fibrous tissue attaching muscle to bone
Raphe
the line of union of the halves of various symmetrical parts.
Apponeurosis
fibrous or membranous sheet connection a muscle and the part it moves
Ligament
band of regular fibrous tissue that connects bones