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- Bein, T, et al.
(författare)
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Ventilation-perfusion relationships in acute respiratory failure
- 1996
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Ingår i: ANAESTHESIST. - : SPRINGER VERLAG. ; 45:4
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Acute respiratory failure is characterised by mismatch of ventilation with perfusion (V-A/Q). The multiple inert gas elimination technique (MIGET) is a complex method which allows the description of a virtually continuous distribution of V-A/Q ratios. We
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- Boehly, Thibault, et al.
(författare)
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Cognitive Control in Distracted Dinosaurs
- 2023
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Cognitive control is a skill used to control one’s own behaviour to reach a goal. We compared this skill across archosaurs by using the distraction task on American alligators, emus, chickens, and common ravens. We investigated whether the animals would still find a food reward hidden behind one of two identical opaque barriers after picking up a food distraction. Results show that all species can find the hidden food reward despite being distracted, but the presence of a distraction impaired the performance of all species except the common raven. All species being from the clade Archosauria, it suggests that cognitive control is a conserved ability which underwent little changes since their last common ancestor, allowing to draw some inferences about extinct related taxa (e.g., non-avian dinosaurs). Moreover, raven’s unflinching performance could be explained by the sharp increase in telencephalic neuron numbers which occurred in the clade Telluraves.
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- Congdon, Jenna V., et al.
(författare)
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Hear them roar: A comparison of black-capped chickadee (Poecile atricapillus) and human (Homo sapiens) perception of arousal in vocalizations across all classes of terrestrial vertebrates
- 2019
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Ingår i: Journal of Comparative Psychology. - : American Psychological Association (APA). - 1939-2087 .- 0735-7036.
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Tidskriftsartikel (refereegranskat)abstract
- Recently, evidence for acoustic universals in vocal communication was found by demonstrating that humans can identify levels of arousal in vocalizations produced by species across three biological classes (Filippi et al., 2017). Here, we extend this work by testing whether two vocal learning species, humans and chickadees, can discriminate vocalizations of high and low arousal using operant discrimination go/no-go tasks. Stimuli included vocalizations from nine species: giant panda, American alligator, common raven, hourglass treefrog, African elephant, Barbary macaque, domestic pig, black-capped chickadee, and human. Subjects were trained to respond to high or low arousal vocalizations, then tested with additional high and low arousal vocalizations produced by each species. Chickadees (Experiment 1) and humans (Experiment 2) learned to discriminate between high and low arousal stimuli and significantly transferred the discrimination to additional panda, human, and chickadee vocalizations. Finally, we conducted discriminant function analyses using four acoustic measures, finding evidence suggesting that fundamental frequency played a role in responding during the task. However, these analyses also suggest roles for other acoustic factors as well as familiarity. In sum, the results from these studies provide evidence that chickadees and humans are capable of perceiving arousal in vocalizations produced by multiple species.
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| 8. |
- Hedenstierna, G, et al.
(författare)
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Gas exchange during anesthesia.
- 1996
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Ingår i: Seminars in Anesthesia. ; 15, s. 312-
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Tidskriftsartikel (refereegranskat)
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