Muscles And Their Function Flashcards
The connection between a tendon and bone is called
The Tendoperiosteal Junction
The Belly
Is the central portion of muscle
Head
One of at least 2 extensions of a particular muscle belly that attaches via its own tendon
Concentric Contraction
When muscle develops tension, it pulls on the attachments of the muscle
When the tension is greater than the resistance, the muscles undergoes a shortening or contraction
Pulls to attachments closer together
Isotonic Contraction
When a muscle contracts against a resistance that is not changing (lifting 5kg) and the muscles changes in length
Isometric Contraction
When a muscle contracts against a resistance with no visible change in muscle length
Eccentric Contraction
When a muscle is generating force but is unable to overcome the force the muscle undergoes a lengthening
Used as a control movement or as a act to brake movement
Muscle attachments move away from each other.
Origin
The attachment that is fixed is sometimes called the origin
Insertion
The attachment that is moving is sometimes called the insertion
Prime Mover (Agonist)
The primary muscle causing the desired movement
Quads for knee extension
Ham strings for knee Flexion
Antagonist
The muscle that opposes a specific action
Knee Flexion - hamstrings making quads antagonistic
Stabilizers (fixators)
The muscles that stabilize the more proximal joints during actions of more distal joints
Ex. Low back muscles stabilize trunk while hip flexors can lift the leg
Synergists (neutralizers)
The muscle(s) that work to assist the prime mover in a given action
Ex. Large calf muscles point the toes
Fascia Lata
It is connective tissue that invests throughout the thigh and surrounds the thigh muscle in a sense tubular sheath.
Iliotibial Tract
The Fascia Lata thickens laterally called the ITBand
