On the Carotid Body of Certain Birds

Kock, L.L. De

doi:10.1159/000141406

Cited by 12 publications

(2 citation statements)

References 1 publication

(1 reference statement)

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“…In serial sections from two blocks, it was possible to trace fibres which entered the carotid body having run from the nodose ganglion of the vagus nerve. In all these respects, the appearance of carotid body tissue was identical to that published by Kose (1904), Muratori (1932Muratori ( , 1934, Chowdhary (1953), de Kock (1954, 1958, 1959. Typical appearances are illustrated in PI.…”

Section: Chemoreceptor Denervation In the Duck 281supporting

confidence: 77%

“…In all the blocks studied, carotid body tissue was enclosed in a thick capsule and formed a roughly elliptical mass 1-3-2-1 x 0-8-1-5 mm. This mass varied in position and these variations fall within the range seen by de Kock (1958) in the eider-duck and other birds. Thus in two blocks, the carotid body was found close to the ultimobranchial body, and in one block close to the lower parathyroid gland at the lower pole of the thyroid.…”

Section: Chemoreceptor Denervation In the Duck 281supporting

confidence: 74%

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The carotid body in the duck and the consequences of its denervation upon the cardiac responses to immersion

Jones¹,

Purves²

1970

The Journal of Physiology

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SUMMARY1. The anatomy of the carotid body and its afferent nerve supply was studied in the duck and a method of denervating the carotid body which ensures a satisfactory post-operative course is described.2. The effect of denervating the carotid body upon the cardiac response to immersion of the head in water was studied in ten ducks which at the time of the test were unanaesthetized.3. When the nerves were intact, immersion of the head caused a fall in heart rate after a latent period of between 1 and 9 see to an average of 24 % of the resting rate after 30 sec. Simultaneous measurement of arterial oxygen tension (Pa, 02) in the brachiocephalic artery showed a rapid initial fall during the initial 10 see from control levels, 93-103 mm Hg, to between 42 and 47 mm Hg, followed by a gradual fall of 3-5 mm Hg for each subsequent 30 sec period of submergence.4. Following carotid body denervation, the latent period before heart rate started to fall was no different from control but the average fall in heart rate was now to 90 % of the resting rate and brachiocephalic Pa 02 continued to fall steadily during submergence reaching levels of between 10 and 21 mm Hg by the end of the second minute.5. Stimulation of the central end of branches of the IXth (glossopharyngeal) nerve supplying the glottis caused apnoea and bradycardia.6. It is concluded that apnoea and bradycardia during submergence in the duck is initiated reflexly from receptors in the nares, pharynx and glottis but that the profound degree of bradycardia and mechanisms which maintain a relatively high Pa,0, are regulated by peripheral chemoreceptor activity.

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Section: Chemoreceptor Denervation In the Duck 281supporting

confidence: 77%

Section: Chemoreceptor Denervation In the Duck 281supporting

confidence: 74%

The carotid body in the duck and the consequences of its denervation upon the cardiac responses to immersion

Jones¹,

Purves²

1970

The Journal of Physiology

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Innervation of the parathyroid in the european starling (Sturnus vulgaris)

Wideman

1980

Journal of Morphology

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Anatomical studies were conducted to characterize the source, type, and distribution of parathyroid gland innervation in European starlings. Denervation experiments demonstrated that the parathyroid glands and adjacent carotid bodies are innervated by nerve fibers originating in the nodose ganglion of the vagus nerve. In the parathyroid parenchyma, these fibers terminate adjacent to chief cells or near vascular smooth muscle. Vagal fibers also form synapses with catecholamine-containing glomus cells of the carotid body. Blood parenchyma. These observations suggest that vagal innervation may influence parenchyma. These observations suggest that vagal innervation may influence parathyroid function in starlings either through direct chief cell innervation or through alteration of vascular perfusion. A neurohemal relationship also may exist between the carotid body and parathyroids.

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The general ultrastructure of the carotid body of the domestic fowl

et al. 1975

Cell Tissue Res.

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Electron microscopic studies of the carotid body of the domestic fowl (Gallus gallus domesticus) have shown Type I and Type II cells combined with axons into compact groups. The many Type I cells in the depths of the organ had a body, containing the nucleus, and an elongated, flared process. Some of the Type I cells in the superficial regions tended to be spindle-shaped. Type I cells were characterised by membrane-bound, dense-cored vesicles about 120 nm in diameter. Type II cells invested the Type I cells and had axons embedded in them as in Schwann cells. The fine structure of the carotid body in the domestic fowl resembles that of the Lovebird (Uroloncha domestica) and of various amphibia and mammals. The possibility is discussed that the Type I cells may have a chemoreceptor or a general secretory function, or even both of these axons leading to or from Type I cells. The main role of the Type II cells seems to be to provide a pathway for functions together.

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On the Carotid Body of Certain Birds

Cited by 12 publications

References 1 publication

The carotid body in the duck and the consequences of its denervation upon the cardiac responses to immersion

The carotid body in the duck and the consequences of its denervation upon the cardiac responses to immersion

Innervation of the parathyroid in the european starling (Sturnus vulgaris)

The general ultrastructure of the carotid body of the domestic fowl

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