Motor Pathways

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

  • They have a greater effect on extensors than flexors
  • They have a function in fine, independent dexterity
  • They control muscle groups in the limbs, mainly the distal parts
  • They descend in the contralateral lateral funiculus
  • The terminations are focused on contralateral lateral interneurones and motorneurones
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2. Which of these is not a way in which motor units can be activated?

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

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

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

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. The stretch reflex is a?

  • Postural reflex
  • Protective reflex
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