Transient responses of heart rate, arterial pressure, and head movement at the beginning of eating in awake cats.

Matsukawa, Kanji; Ninomiya, Ishio

doi:10.2170/jjphysiol.35.599

Cited by 8 publications

(24 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the study of sheep cited above, BlairWest and Brook (18) not only observed increases in HR and BP similar to those seen in other species (1,4,5,15,17), but also noted the production of copious amounts of saliva. This resulted in a reduction in renal blood flow with the consequent retention of sodium and water, and a reduction in the circulatory volume with a rise in plasma renin concentrations (18).…”

supporting

confidence: 63%

“…These include alterations in blood pressure (BP), heart rate (HR), and blood flow to and from those tissues and organs that participate in neural and hormonal functions (1)(2)(3)(4)(5). Sleep, for example, is an activity accompanied by a fall in BP (6).…”

mentioning

confidence: 99%

“…Studies have demonstrated that their participation in the response to feeding is species dependent. Matsukawa and Ninomiya (5) suggested that the baroreceptors are not involved in the reflex increase in HR and sympathetic activity in the renal system that occurs in the first stage of feeding in conscious cats, but do affect renal nerve activity during the final stages of ingestion. Afferents from the arterial baroreceptors exert an inhibitory influence on the discharge of renal activity, particularly when BP is high.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Cardiovascular responses to locomotor activity and feeding in unrestrained three-toed sloths, Bradypus variegatus

Duarte

Jaguaribe

Pedrosa

et al. 2004

Braz J Med Biol Res

View full text Add to dashboard Cite

Heart rate (HR) and systolic (SBP), diastolic (DBP) and mean (MBP) blood pressure were recorded by biotelemetry in nine conscious unrestrained sloths for 1 min every 15 min over a 24-h period. The animals were allowed to freely move in an acoustically isolated and temperature-controlled (24 ± 1ºC) experimental room with light-dark cycle (12/12 h). Behavior was closely monitored through a unidirectional visor and classified as resting (sitting or suspended), feeding (chewing and swallowing embauba leaves, Cecropia adenops), or locomotor activity around the tree trunk or on the room floor. Locomotor activity caused statistically significant increases in SBP (+8%, from 121 ± 22 to 131 ± 18 mmHg), DBP (+7%, from 86 ± 17 to 92 ± 10 mmHg), MBP (+8%, from 97 ± 19 to 105 ± 12 mmHg), and HR (+14%, from 84 ± 15 to 96 ± 15 bpm) compared to resting values, indicating a possible major influence of the autonomic nervous system on the modulation of cardiac function during this behavior. During feeding, the increase in blood pressure was even higher (SBP +27%, from 119 ± 21 to 151 ± 21 mmHg; DBP +21%, from 85 ± 16 to 103 ± 15 mmHg; MBP +24%, from 96 ± 17 to 119 ± 17 mmHg), while HR remained at 14% (from 84 ± 15 to 96 ± 10 bpm) above resting values. The proportionally greater increase in blood pressure than in HR during feeding suggests an increase in peripheral vascular resistance as part of the overall response to this behavior.

show abstract

supporting

confidence: 63%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Cardiovascular responses to locomotor activity and feeding in unrestrained three-toed sloths, Bradypus variegatus

Duarte

Jaguaribe

Pedrosa

et al. 2004

Braz J Med Biol Res

View full text Add to dashboard Cite

show abstract

“…There are also reports that feeding produces a rise in heart rate and blood pressure, with values being maintained throughout the entire period of feeding activity (Duarte DPF, unpublished data). This differs from the response observed in other animals such as cats (9).…”

contrasting

confidence: 97%

The effect of feeding on the respiratory activity of the sloth

Pedrosa

Lima

Bezerra

et al. 2002

Braz J Med Biol Res

View full text Add to dashboard Cite

The aim of the present study was to confirm whether feeding influences the resting breathing rate and to observe possible alterations in blood gas and pH levels produced by feeding in unanesthetized sloths (Bradypus variegatus). Five adult male sloths (4.1 ± 0.6 kg) were placed daily in an experimental chair for a period of at least 4 h for sitting adaptation. Five measurements were made for each sloth. However, the sloths one, two and five were studied once and the sloths three and four were studied twice. Breathing rate was determined with an impedance meter and the output signal was digitized. Arterial blood samples were collected for blood gas analysis with a BGE electrolytes analyzer and adjusted for the animal's body temperature and hemoglobin content. The data are reported as mean ± SD and were collected during the resting period (8:00-10:00 h) and during the feeding period (16:00-18:00 h). The mean breathing rate increased during mastication of ymbahuba leaves (rest: 5.0 ± 1, feeding: 10 ± 1 bpm). No significant alterations were observed in arterial pH (rest: 7.42 ± 0.05, feeding: 7.45 ± 0.03), PCO 2 (rest: 35.2 ± 5.3, feeding: 33.3 ± 4.4 mmHg) or PO 2 (rest: 77.5 ± 8.2, feeding: 78.4 ± 5.2 mmHg) levels. These results indicate that in unanesthetized sloths 1) feeding evokes an increase in breathing rate without a significant change in arterial pH, PCO 2 or PO 2 levels, and 2) the increase in breathing rate produced by feeding probably is due to the act of mastication.

show abstract

“…and arterial blood pressure (A.P. ) transiently increased at the beginning of eating (Abramson & Fierst, 1941;Fronek & Stahlgren, 1968;Blair-West & Brook, 1969;Vatner, Franklin & Van Citters, 1970a, b;Ehrlich, Tosheff, Caldini, Abbey & Brady, 1972;Vatner, Patrick, Higgins & Franklin, 1974;Bloom, Edwards, Hardy, Malinowska & Silver, 1975; Houpt, Baldwin, Houpt & Hills, 1983;Matsukawa & Ninomiya, 1985). In the dog and baboon, cardiac output and renal and mesenteric vascular resistances increased at the beginning of eating whereas coronary vascular resistance decreased (Fronek & Stahlgren, 1968;Vatner et al 1970Vatner et al a, b, 1974Ehrlich et al 1972;).…”

Section: Introductionmentioning

confidence: 99%

Changes in renal sympathetic nerve activity, heart rate and arterial blood pressure associated with eating in cats.

Matsukawa

Ninomiya

1987

The Journal of Physiology

View full text Add to dashboard Cite

SUMMARY1. Renal sympathetic nerve activity, heart rate and arterial blood pressure were simultaneously measured in thirteen awake cats before, during and after eating which was evoked by presenting food for a period of 10-15 s.2. With food presentation, eating behaviour occurred in 93% (191) of 205 trials, and renal sympathetic nerve activity significantly increased in 65 % of the 191 trials.On the other hand, in many of food presentation trials when no eating occurred, or with presentation of an empty food box, renal sympathetic nerve activity did not change significantly.3. Eating started 1-8 s after the food presentation. The increase in renal sympathetic nerve activity was closely related to the beginning of eating but not to the onset of food presentation. Renal sympathetic nerve activity and heart rate increased with a slight time lag of 0-5-1-5 s from the onset of eating, whereas an increase in arterial blood pressure followed the onset of eating by 5-5 s. After the beginning of eating, renal sympathetic nerve activity, heart rate and arterial blood pressure increased at a maximum of 61 + 18 %/O (mean + S.E. of mean), 26 + 4 0 beats/ min, and 17+4-9 mmHg from the control values at 1P0, 5-5 and 115 s, respectively.4. Cardiac-related grouped discharges of renal sympathetic nerve activity, which were observed at rest, increased during eating.5. When arterial blood pressure was elevated by noradrenaline (2-5 ,ug/kg I.v.), renal sympathetic nerve activity during resting was almost completely inhibited and the increase in renal sympathetic nerve activity during eating was not induced.6. We conclude that renal sympathetic nerve activity increases in association with eating behaviour but not as firmly with the food presentation, and that the increase in renal sympathetic nerve activity is initiated by descending input from the higher central nervous system rather than either by the viscero-autonomic reflex due to food intake or by the baroreflex due to a decrease in arterial blood pressure.

show abstract

Transient responses of heart rate, arterial pressure, and head movement at the beginning of eating in awake cats.

Cited by 8 publications

References 16 publications

Cardiovascular responses to locomotor activity and feeding in unrestrained three-toed sloths, Bradypus variegatus

Cardiovascular responses to locomotor activity and feeding in unrestrained three-toed sloths, Bradypus variegatus

The effect of feeding on the respiratory activity of the sloth

Changes in renal sympathetic nerve activity, heart rate and arterial blood pressure associated with eating in cats.

Contact Info

Product

Resources

About