Motor Pathways

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1. 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
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Other questions in this quiz

2. Which of these is not a way in which muscle force can be modulated?

  • Lateral Excitation
  • Frequency Modulation
  • Size Principle

3. Action potentials fired by 1a muscle spindle fibres increases when?

  • The muscle spindle fibre is being stretched
  • As the length of the muscle spindle fibre increases

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

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

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

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

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