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17 Cards in this Set
- Front
- Back
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Location of respiratory center
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groups of neurons located bilaterally in medulla oblongata and pons of brainstem
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if a lesion occurs at the dorsal portion of the medulla what respiratory function is lost?
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Inspiration mostly.
Most fundamental role in control of respiration is lost. |
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a lesion B/L is found on the ventrolateral medulla, what function is lost?
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Expiration mainly
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a PT suffers lesion B/L in the dorsal superior region of the pons occurs after an automobile accident, what function is lost?
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PT is unable to regulate the depth and rate of breathing
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Specific location of most of the neurons of Dorsal Respiratory group
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length of medulla in nucleus of tractus solitarius
some located in reticular substance of medulla |
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what nerves terminate in the tractus solitarius to relay sensory information to the respiratory center
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vagus and glossopharyngeal nn.
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if the glossopharyngeal and vagus nerves were damaged, what sensory information important to respiration would be lost?
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information from
peripheral chemoreceptors baroreceptors various receptors in lungs |
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if the dorsal respiratory goup of neurons was lesioned, what function would be lost other than inspiration
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basic rhythm of respiration
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If there was no inspiratory ramp, what would be an obvious characteristic of a PT's respiration
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gasps of inspiration
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if a PT complains of shortness of breath during exercise, what is wrong with the inspiratory ramp?
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rate of increase of ramp signal
controls how rapidly the lungs fill |
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if a PT is hyperventilating, what quality of the inspiratory ramp is influencing her?
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Limiting point of ramp signal
controls rate of respiration earlier ramp cessation causes shorter inspiration. Frequency is thus increased |
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specific location of the pneumotaxic center
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located dorsally in nucleus parabrachialis of upper pons
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what signal is transmitted by pneumotaxic center
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the switchoff point is controlled through sending signals from nucleus parabrachialis to the inspiratory area of the dorsal respiratory group
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if the pneumotaxic center was lesioned, what would be obvious about a PT's deficits?
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the duration of filling the lung in the lung cylce would be affected
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If a pneumotaxic signal is strong, what is the PT's reaction
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short inspiration phase
could be as fast as 0.5 sec lungs are only slightly filled |
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If a pneumotaxic signal is weak?
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longer inspiration phase
filling the lungs with an excess of air |
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what is the primary and secondary function of the pneumotaxic center
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1. limit inspiration
2. increasing rate of respiration |
