contractions and movement Flashcards
what are the 3 types of contractions
isometric, cincentric and eccentric
explain the movement of an isometric contraction
there is no movement generated - external torque is equal to internal torque
explain the movement of an concentric contraction
the muscle moment overcomes external forces
explain the movement of an eccentric contraction
The external moment is larger than the internal moment so the external forces are winning and overcoming the internal forces as the muscle might not be strong enough
what is a lever arm
it is the perpendicular distance between the axis of rotation and the application of forces
what is the equation for generation of movement
movement = force * lever arm (M=F*d)
give an example of a muscle belly
bicep tricep quads
what is the outer layer of the muscle belly called
epimysium
what does the muscle belly consist of
many fascicles
what are the fascicles enclosed by
the fascicles are eclosed by the perimysium
what is inside a singular fascicle
muscle fibers are within a fascicle
what are muscle fibers enclosed by
muscle fibers are enclosed by the endomysium
what is a lever arm
it is the perpendicular distance between the axis of rotation and the application of force.