Central Motor Neuron Syndrome and Peripheral Motor Neuron Syndrome Quiz
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Questions and Answers

Which of the following is the MAIN pathway for control of voluntary movement?

  • Cranial nerve nuclei
  • Corticobulbar tract
  • Corticospinal tract (correct)
  • Anterior horn cells

    • Which lobe of the brain is responsible for the perception and recognition of auditory stimuli, memory, and speech?

  • Temporal lobe (correct)
  • Occipital lobe
  • Parietal lobe
  • Frontal lobe

    • What is the MAIN difference between a central (upper motor neuron) lesion and a peripheral (lower motor neuron) lesion?

  • Central lesions cause weakness in specific myotomes, while peripheral lesions cause diffuse weakness.
  • Central lesions cause spastic paresis, while peripheral lesions cause flaccid paresis. (correct)
  • Central lesions cause muscle fasciculations, while peripheral lesions do not.
  • Central lesions cause increased reflexes, while peripheral lesions cause decreased reflexes.

    • Which body part has the largest representation in the motor homunculus?

    <p>Hand</p> Signup and view all the answers

    What is the MAIN effect of a lesion to the internal capsule?

    <p>Dense hemiplegia</p> Signup and view all the answers

    What are the clinical signs associated with a lesion of the upper (central) motor neuron, pyramidal tract?

    <p>Increased muscle tone and spastic pyramidal signs</p> Signup and view all the answers

    What are the characteristics of peripheral (flaccid) paresis/paralysis?

    <p>Muscle fasciculations and atrophy</p> Signup and view all the answers

    Which area of the brain controls voluntary movements of specific body parts?

    <p>Primary motor cortex</p> Signup and view all the answers

    What is the primary difference between upper motor neuron (UMN) pyramidal tract lesions and anterior horn cell lesions?

    <p>Increased muscle tone vs. muscle fasciculations</p> Signup and view all the answers

    Which part of the brain contributes to the control of movements and planning of complex movements?

    <p>Premotor cortex, SMA</p> Signup and view all the answers

    What signs are indicative of a peripheral (flaccid) paresis/paralysis?

    <p>Hyporeflexia/areflexia and muscle fasciculations</p> Signup and view all the answers

    Which area of the brain is responsible for visual processing?

    <p>Occipital lobe</p> Signup and view all the answers

    What is the primary function of the corticospinal tract in the motor system?

    <p><strong>Control of voluntary movement</strong></p> Signup and view all the answers

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