2) Because patients with PLS rely on recruiting additional units to generate increased force, rather than optimizing the

[answerhappygod]

2) Because patients with PLS rely on recruiting additional unitsto generate increased force, rather than optimizing the firing rateof already active units, it is likely that they recruit unitshigher up the recruitment sequence than control subjects do. Whatmight be the consequences of this altered activation pattern?
a) fine motor control would be worse than in an age-matchedcontrol at the same level of force production
b) maximal force production would be lower than in anage-matched control
c) motor neurons would rely more on rate coding than in anage-matched control at the same level of force production d)muscles would fatigue at lower levels of force production than inan age-matched control
3) Which of the following could account for an increase inexcitability? Choose ALL that apply.
a) decreased descending excitatory drive (from higher braincenters) onto inhibitory spinal interneuron innervating motorneuron
b) decreased descending inhibitory drive (from higher braincenters) onto motor neuron
c) increased descending excitatory drive (from higher braincenters) onto motor neuron
d) increase in neuronal input resistance e) None of theabove.