USMLE Step 1 Respiratory Physiology Review 61 15 Pontine respiratory Centers

USMLE Step 1 Respiratory Physiology Review 61 15 Pontine respiratory Centers

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  • USMLE Audio Review files from our “Gold Standard USMLE Reviews”
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Play USMLE Audio MP3   61 15 Pontine respiratory Centers  Below

Begin  61 15 Pontine respiratory Centers  Transcription

Two pontine centers located in the brain stem can alter the rhythm of respiration generated in the medulla.

What are these two pontine centers called? They start with A and P

  • The two pontine centers that alter respiratory rhythm are the apneustic center and the pneumotaxic center.

Stimulation of which pontine center causes the act of inspiration to be prolonged?

  • When the apneustic center is stimulated, the act of respiration is prolonged

Where in the pons is the athneustic center located?

  • The apneustic center is in the caudal pons.

Where in the pons is the pneumotaxic center located?

  • In the rostral, or upper part, of the pons

What does stimulation of the pneumotaxic center cause to happen?

  • The act of inspiration is shortened and breathing becomes shallower and more rapid.

Student doctor, please pause the tape and summarize what has been discussed about pontine centers.

  • Two pontine centers located in the brain stem can alter the rhythm of respiration generated in the medulla. They are the apneustic center and the pneumotaxic center. Stimulation of the apneustic center located in the caudal pons causes the act of inspiration to be prolonged. The pneumotaxic center is located in the rostral or upper part of the pons. When the pneumotaxic center is stimulated, the act of inspiration is shortened and breathing becomes shallower and more rapid.

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