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 (D)</p> Signup and view all the answers

Which type of motor neuron innervates extrafusal fibers?

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

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

<p>Contract intrafusal fibers (C)</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 (A)</p> Signup and view all the answers

Reciprocal inhibition in motor control refers to:

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

Which sensory receptor is responsible for detecting muscle stretch?

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

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

<p>Initiate muscle contraction (A)</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 (B)</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 (C)</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. (D)</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 (B)</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. (C)</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. (D)</p> Signup and view all the answers

How does reciprocal inhibition contribute to motor control?

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

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