Pontine Respiratory Group and Respiratory Pattern Modulation
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Questions and Answers

Where is the central pattern generator (CPG) for respiration located?

  • Thalamus
  • Medullary respiratory center (correct)
  • Pons
  • Cerebellum

Which nucleus in the pons is involved in fine-tuning the respiratory pattern and responding to hypercapnea or hypoxia?

  • Nucleus parabrachialis medialis (NPBM) (correct)
  • Dorsal respiratory group (DRG)
  • Ventral respiratory group (VRG)
  • Kölliker-Fuse nucleus (KF)

What is responsible for the myogenic beating of the heart?

  • Central pattern generator
  • Expiratory neurons
  • Neurogenic signals (correct)
  • Inspiratory neurons

Which nerves are associated with opening the mouth during breathing?

<p>Cranial nerve V (Trigeminal) (A)</p> Signup and view all the answers

Why are inspiratory and expiratory neurons considered intermingled?

<p>Their classification as distinct centers is no longer accurate (C)</p> Signup and view all the answers

Which part of the brainstem houses clusters of respiratory neurons that can be classified as inspiratory or expiratory?

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

Where does the Central Pattern Generator (CPG) receive input from?

<p>Higher brain centers, peripheral and central chemoreceptors (A)</p> Signup and view all the answers

Which muscles are innervated by the phrenic nerve connected to the medullary DRG and VRG?

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

What is the role of slowly adapting pulmonary stretch receptors in respiration?

<p>Mediate the Hering-Breuer inflation reflex (A)</p> Signup and view all the answers

Which part of the brain is responsible for sending rhythmic drive to motoneurons controlling respiratory muscles?

<p>Central Pattern Generator (CPG) (A)</p> Signup and view all the answers

What is the main function of the medullary VRG in respiration?

<p>Connected to spinal nerves innervating internal intercostals and abdominal muscles (B)</p> Signup and view all the answers

What type of receptors are involved in the Hering-Breuer inflation reflex?

<p>Slowly adapting pulmonary stretch receptors (A)</p> Signup and view all the answers

Where is the DRG located?

<p>In the nucleus of the tractus solitarius (A)</p> Signup and view all the answers

Which group of neurons is primarily found in the DRG?

<p>Inspiratory neurons (B)</p> Signup and view all the answers

What information do vagal afferents send to the DRG?

<p>Information on arterial PCO2, PO2, and pH (C)</p> Signup and view all the answers

Which nuclei contain the VRG?

<p>Retrofacial nucleus, nucleus ambiguous, and nucleus retroambifualis (C)</p> Signup and view all the answers

Which complex is considered the primary respiratory pattern generator in the brain?

<p>Pre-Bötzinger complex (A)</p> Signup and view all the answers

What is the target of drugs aimed at stimulating breathing when it is depressed?

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

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