Physiology: Motor Control - Chapter 9 Quiz
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Questions and Answers

Which part of the CNS is responsible for determining appropriate movement and the results?

  • Basal ganglia (correct)
  • Thalamus
  • Motor association areas
  • Prefrontal cortex

    • Which part of the brain is responsible for initiating the action of specific motor units?

  • Cerebellum
  • Thalamus
  • Brain stem
  • Motor cortex (correct)

    • What type of reflex is the muscle spindle reflex?

  • Multisynaptic
  • Polyneuronal
  • Bisynaptic
  • Monosynaptic (correct)

    • In the muscle spindle reflex, what happens when the stretch receptor in the spindle is activated?

    <p>Increase in action potentials</p> Signup and view all the answers

    Which type of motor neuron innervates extrafusal fibers?

    <p>Alpha motor neurons</p> Signup and view all the answers

    What is the function of gamma (γ) motor neurons in muscle spindles?

    <p>Contract intrafusal fibers</p> Signup and view all the answers

    What is the main difference between monosynaptic and poly- or multisynaptic reflexes?

    <p>The number of synapses involved</p> Signup and view all the answers

    Reciprocal inhibition in motor control refers to:

    <p>Simultaneously exciting one muscle while inhibiting its antagonist</p> Signup and view all the answers

    Which sensory receptor is responsible for detecting muscle stretch?

    <p>Muscle spindles</p> Signup and view all the answers

    In motor control, what is the function of lower motor neurons?

    <p>Initiate muscle contraction</p> Signup and view all the answers

    In ipsilateral reflexes, the sensory input and motor output occur on:

    <p>The same side of the body</p> Signup and view all the answers

    The integration of sensory information and generation of motor responses in reflex actions primarily occurs in the:

    <p>Spinal cord</p> Signup and view all the answers

    What is the main difference between monosynaptic and polysynaptic reflexes?

    <p>Monosynaptic reflexes involve a single synapse, while polysynaptic reflexes involve multiple synapses.</p> Signup and view all the answers

    In a monosynaptic reflex arc, where does the synaptic transmission occur?

    <p>Between the sensory neuron and the motor neuron</p> Signup and view all the answers

    Which of the following statements is true about ipsilateral reflexes in motor control?

    <p>Ipsilateral reflexes involve a response on the same side of the body as the stimulus.</p> Signup and view all the answers

    What role do sensory receptors play in motor control?

    <p>Sensory receptors detect changes in the external environment and convert them into neural signals.</p> Signup and view all the answers

    How does reciprocal inhibition contribute to motor control?

    <p>Reciprocal inhibition relaxes antagonist muscles during muscle contraction.</p> Signup and view all the answers

    What is a key function of motor neurons in motor control?

    <p>Motor neurons initiate muscle contractions by transmitting signals from the brain.</p> Signup and view all the answers

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