Motor Pathways

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

  • Descending motor pathways
  • Spontaneously
  • Spinal nerve reflexes
  • Cranial nerve reflexes
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2. Do type I motor units exhibit fast or slow responses?

  • Slow
  • Fast

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

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

4. Which of these is false when considering lateral descending motor pathways?

  • They control muscle groups in the limbs, mainly the distal parts
  • They descend in the contralateral lateral funiculus
  • They have a greater effect on extensors than flexors
  • They have a function in fine, independent dexterity
  • The terminations are focused on contralateral lateral interneurones and motorneurones

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

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

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