Review 2 Flashcards

1
Q

Secondary (II) sensory afferents innervate what type of intrafusal fibers?

A

Secondary sensory ending are seen in all BUT dynamic bag fibers.

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2
Q

Primary sensory endings are sensitive to changes in what?

A

sensitive to length and velocity

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3
Q

Secondary sensory endings are sensitive to changes in what?

A

secondary sensory endings are sensitive to only length

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4
Q

What type of neuron can adjust the sensitivity of the intrafusal fibers?

A

gamma motoneurons

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5
Q

What is the function of the golgi tendon organ

A

muscle force and tension

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6
Q

what is the function of muscle spindles

A

detects changes in muscle length and velocity

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7
Q

What is a motor unit?

A

an alpha motoneuron and muscle fibers it innervates

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8
Q

Characterisitcs of Surface EMG

A
  • averages the activity of all (MUs)
  • causes no discomfort
  • is not selective
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9
Q

Characteristics of Intrafusal EMG

A
  • records the activity of individual MUs
  • is uncomfortable
  • provides information about excitation of a small volume within a muscle
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10
Q

Primary (Ia) sensory afferents innervate what type of intrafusal fibers?

A

Primary endings are typically seen in virtually ALL intrafusal fibers

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