Module 10 Flashcards
Which of the following is FALSE regarding Fitts Law?
a.) It is the most highly successful and well studied mathematical model of human motion.
b.) The more movements made per minute, the more errors are made.
c.) Paul Fitts focused his attention on human factors, looking at their motor control with devices.
d.) none of the above
d.) none of the above
True or False: Fitts law states that increasing index of difficulty increases speed.
False; increasing index of difficulty decreases speed
True or False: if you are teaching someone a ballistic movement, you would make the target size larger.
True
True or False: motor redundancy is a central problem in motor control.
True
True or False: the central nervous system needs to increase the number of redundant degrees of freedom.
False; it needs to eliminate redundant degrees of freedom
What was the outcome of the subject learning degrees of freedom on a ski simulator apparatus?
a.) with more practice, there is less ROM
b.) with more practice, there is more ROM
b.) with more practice, there is more ROM
_______________ is a vector specifying a problem of relative levels of muscle activation (if one muscle is doing X, another muscle needs to do Y to complete the task).
a.) motor redundancy
b.) muscle synergy
c.) degrees of freedom
b.) muscle synergy
True or False: muscle synergy implies that from many possible motor solutions, a limited set is chosen by each individual, which addresses the degrees of freedom problem.
True
True or False: elements within the synergy should not compensate for each other’s load to minimize the error the task.
False; they should compensate for each other’s load
Are muscle synergies learned or innate?
a.) learned only
b.) innate only
c.) innate to some degree
c.) innate to some degree
Muscle synergies may be encoded in cells at which levels?
a.) spinal cord
b.) brain stem (posture)
c.) cortex (grasping)
d.) all of the above
e.) none of the above
d.) all of the above
True or False: muscle synergies do not change rapidly.
True
Muscle synergies can be modified by changing the levels of…
a.) spatiotemporal patterns
b.) motor performance
c.) muscle activation
c.) muscle activation
Generalize motor program proposes that hypothetical variables can be scaled in time and magnitude, and then projected into different _________ systems.
a.) affector
b.) effector
b.) effector
True or False: the principle of abundance allows the degrees of freedom to increase, so we can come up with multiple ways to be very accurate.
True
