Motor Systems/LMNs
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| show | basal ganglia
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| What is the relation of flexor to extensor motoneuron pools? | show 🗑
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| show | proximal muscles are medial to distal muscles within ventral horn
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| Would one expect muscles of the medial rectus to have a high or low muscle fiber:motor unit ratio? | show 🗑
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| show | high (1000 fibers per unit)
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| show | gamma motoneurons
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| How much synaptic current is required to intiate repetitive firing of a motoneuron? | show 🗑
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| Which type of muscle maximally contracts at higher frequencies (relative to the other muscle types)? | show 🗑
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| Explain the concept of motor unit plasticity. | show 🗑
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| How might an experimenter achieve more force from the muscles in the cats he is testing? | show 🗑
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| Which type of muscle's nerve fibers will have the lowest threshold? | show 🗑
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| If a firing rate of 20 Hz is needed to fully recruit all motor units of the soleus muscle, will a lower or higher frequency be needed to fully recruit a lateral rectus muscle? | show 🗑
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| Explain the size principle of motoneurons. | show 🗑
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| show | focal atrophy or diffuse muscle wasting, fasciculations, muscle weakness, decreased DTRs
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