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Functional Anatomy
Muscle introduction
24
Anatomy
Undergraduate 3
09/07/2013

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Cards

Term
Tendon
Definition
Connects muscle to bone
Term
Epimysium
Definition
Outer layer/protective sheath

Covers muscle
Term
Perimysium
Definition
Deep to epimysium

Covers fascicles
Term
Fasicles
Definition
House endomysium

Covered by perimysium
Term
Endomysium
Definition
House muscle fibers

Housed in fasicles
Term
Muscle fibers
Definition
Housed in endomysium

House 100-1000 myofibrils
Term
Myofibrils
Definition
Myosin/actin

Provide stratifacation in muscle

Make up a sarcomere
Term
Muscle can be named by (7)
Definition
Shape
Size
Direction
Action
#heads/origins
Location
Points of attachment
Term
Origin
Definition
Muscle attachment that remains fixed
Term
Insertion
Definition
Muscle attachment that moves when muscle is used
Term
Innervation
Definition
Communication between nerve and muscle
Term
Action
Definition
Movement muscles make when they contract
Term
Anterior crossing of joints produces..?
Definition
Flexion
Term
Posterior crossing of joints produces..?
Definition
Extension
Term
Lateral crossing of joints produces..?
Definition
Abduction
Term
Medial crossing of joints produces..?
Definition
Adduction
Term
Types of contractions (3)
Definition
Isometric
Concentric
Eccentric
Term
Isometric
Definition
Muscle torque = resistive torque

Produces mixed muscle

No change in muscle length
Term
Concentric
Definition
Muscle torque > resistive torque

Muscle shortens

Moving away from gravity
Term
Eccentric
Definition
Muscle torque < resistive torque

Muscle lengthens

Moving toward gravity

Muscle still produces force
Term
3 roles of muscle movement
Definition
Agonist
Antagonist
Synergist
Term
Agonist
Definition
Muscles that produce movement
Term
Antagonist
Definition
muscles opposite of agonist

relax and allow movement of agonist
Term
Synergist
Definition
Muscles working together with others to produce movement
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