Motor Pathways

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1. The amount of type 1 and type 2 motor units varies in a muscle dependent upon...?

  • The size of the muscle
  • The function of the muscle
  • Nothing - muscles only contain one type of motor unit
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Other questions in this quiz

2. Which of these is false when considering medial descending motor pathways?

  • The control muscles groups in the neck, trunk and proximal limbs
  • They descend in the ventral funiculus
  • The terminations of this system are bilateral and widely dispersed
  • The main origin is the primary motor cortex
  • They have an anti-gravity function

3. Which of these is not a function of the descending motor pathways?

  • To alter the strength of reflexes
  • To transmit sensory information to the cerebral cortex
  • To activate motor units

4. A stroke affecting the medial descending motor pathways will have?

  • Little effect because the pathways have bilateral terminations
  • A large effect because the terminations are contralateral

5. Which of these is not a way in which motor units can be activated?

  • Spinal nerve reflexes
  • Descending motor pathways
  • Spontaneously
  • Cranial nerve reflexes


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