Cardiac afferent activity in depressor nerve of the chicken

Estavillo, J.A.; Burger, R N Lynn

doi:10.1152/ajplegacy.1973.225.5.1063

Cited by 19 publications

(7 citation statements)

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“…A large population of vagal nonmedullated endings (Estavillo and Burger, 1973) but no medullated endings is found in the left ventricle of birds. Furthermore intrapericardial administration of nicotine in the duck can P. Thor6n: trigger the Bezolddarisch reflex with bradycardia and hypotension (Blix et at., 1976).…”

Section: Cardiac Receptors and The Diving Reflexmentioning

confidence: 94%

Role of cardiac vagal c-fibers in cardiovascular control

Thorén

1979

Reviews of Physiology, Biochemistry and Pharmacology

437

162

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Section: Cardiac Receptors and The Diving Reflexmentioning

confidence: 94%

Role of cardiac vagal c-fibers in cardiovascular control

Thorén

1979

Reviews of Physiology, Biochemistry and Pharmacology

437

162

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“…We chose to perform the vagotomy on the right branch to keep the effects on the heart minimal (e.g. Estavillo and Burger, 1973).…”

Section: Surgerymentioning

confidence: 99%

Disrupting vagal feedback affects birdsong motor control

Méndez

Dall'Asén

Goller

2010

Journal of Experimental Biology

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SUMMARYCoordination of different motor systems for sound production involves the use of feedback mechanisms. Song production in oscines is a well-established animal model for studying learned vocal behavior. Whereas the online use of auditory feedback has been studied in the songbird model, very little is known about the role of other feedback mechanisms. Auditory feedback is required for the maintenance of stereotyped adult song. In addition, the use of somatosensory feedback to maintain pressure during song has been demonstrated with experimentally induced fluctuations in air sac pressure. Feedback information mediating this response is thought to be routed to the central nervous system via afferent fibers of the vagus nerve. Here, we tested the effects of unilateral vagotomy on the peripheral motor patterns of song production and the acoustic features. Unilateral vagotomy caused a variety of disruptions and alterations to the respiratory pattern of song, some of which affected the acoustic structure of vocalizations. These changes were most pronounced a few days after nerve resection and varied between individuals. In the most extreme cases, the motor gestures of respiration were so severely disrupted that individual song syllables or the song motif were atypically terminated. Acoustic changes also suggest altered use of the two sound generators and upper vocal tract filtering, indicating that the disruption of vagal feedback caused changes to the motor program of all motor systems involved in song production and modification. This evidence for the use of vagal feedback by the song system with disruption of song during the first days after nerve cut provides a contrast to the longer-term effects of auditory feedback disruption. It suggests a significant role for somatosensory feedback that differs from that of auditory feedback.

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“…That ventricular myocardial sensory inner vation increases from apex to base, with certain areas of the heart having a greater frequency of nerve endings, is supported by neurophysiological observations [Estavillo and Burger, 1973]. In addition, other histological evidence for this distribution is seen in other avian species and specific ventricular wall regions [Abraham, 1969], Sensory activity arising from specific regions in the ventricle wall and carried exclusively in the middle cardiac nerve re sembles closely that reported arising from mammalian ventricles [Coleridge et a/., 1964], Another observation that can be made con cerns a structure-function relationship.…”

Section: Discussionmentioning

confidence: 80%