Motor Pathways

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1. 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
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Other questions in this quiz

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

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

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. Muscle spindles (a type of stretch receptor) recieve motor supply from...?

  • Gamma motorneurones
  • Delta motorneurones
  • Alpha motorneurones
  • Beta motorneurones

5. The stretch reflex is a?

  • Postural reflex
  • Protective reflex


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