Records |
Author |
Trim, C.M.; Moore, J.N.; Clark, E.S. |
Title |
Renal effects of dopamine infusion in conscious horses |
Type |
Journal Article |
Year |
1989 |
Publication |
Equine veterinary journal. Supplement |
Abbreviated Journal |
Equine Vet J Suppl |
Volume |
|
Issue |
7 |
Pages |
124-128 |
Keywords |
Animals; Blood Pressure/drug effects/physiology; Consciousness/*physiology; Creatinine/blood; Dopamine/administration & dosage/*pharmacology; Dose-Response Relationship, Drug; Female; Heart Rate/drug effects/physiology; Horses/*physiology; Infusions, Intravenous/veterinary; Kidney/blood supply/*drug effects/physiology; Osmolar Concentration; Potassium/blood; Random Allocation; Regional Blood Flow/drug effects/physiology; Renal Artery/drug effects/physiology/ultrasonography; Sodium/blood; Time Factors; Ultrasonography/methods/veterinary; Urination/physiology |
Abstract |
An ultrasonic flow probe was implanted around a branch of the left renal artery in five horses. The effects of dopamine were studied in the unsedated horses 10 days after surgery. Three experiments, separated by at least two days, were performed in random order on each horse. In two experiments, dopamine was infused intravenously for 60 mins at either 2.5 and 5.0 micrograms/kg bodyweight (bwt)/min. Saline was infused for 60 mins before and after each infusion, and for 180 mins in the third experiment as a control. Renal blood flow increased during administration of dopamine at both dose rates (P = 0.0001). Urine volume increased (P = 0.055), and osmolality decreased (P < 0.05), with infusion of dopamine at 5.0 micrograms/kg bwt/min. Arterial blood pressure and heart rate were not significantly affected. Fractional excretions of sodium and potassium were not significantly changed with dopamine infusion. The higher dopamine dose rate was accompanied by dysrhythmias in some horses. |
Address |
Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens 30602, USA |
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PMID:9118094 |
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Call Number |
refbase @ user @ |
Serial |
99 |
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Author |
Forster, H.V.; Pan, L.G.; Bisgard, G.E.; Flynn, C.; Hoffer, R.E. |
Title |
Changes in breathing when switching from nares to tracheostomy breathing in awake ponies |
Type |
Journal Article |
Year |
1985 |
Publication |
Journal of applied physiology (Bethesda, Md. : 1985) |
Abbreviated Journal |
J Appl Physiol |
Volume |
59 |
Issue |
4 |
Pages |
1214-1221 |
Keywords |
Airway Resistance; Animals; Chemoreceptors/physiology; Consciousness; Exertion; Horses/*physiology; Lung Compliance; Pulmonary Gas Exchange; Pulmonary Stretch Receptors/physiology; *Respiration; Respiratory Dead Space; *Tracheotomy |
Abstract |
We assessed the consequences of respiratory unloading associated with tracheostomy breathing (TBr). Three normal and three carotid body-denervated (CBD) ponies were prepared with chronic tracheostomies that at rest reduced physiological dead space (VD) from 483 +/- 60 to 255 +/- 30 ml and lung resistance from 1.5 +/- 0.14 to 0.5 +/- 0.07 cmH2O . l-1 . s. At rest and during steady-state mild-to-heavy exercise arterial PCO2 (PaCO2) was approximately 1 Torr higher during nares breathing (NBr) than during TBr. Pulmonary ventilation and tidal volume (VT) were greater and alveolar ventilation was less during NBr than TBr. Breathing frequency (f) did not differ between NBr and TBr at rest, but f during exercise was greater during TBr than during NBr. These responses did not differ between normal and CBD ponies. We also assessed the consequences of increasing external VD (300 ml) and resistance (R, 0.3 cmH2O . l-1 . s) by breathing through a tube. At rest and during mild exercise tube breathing caused PaCO2 to transiently increase 2-3 Torr, but 3-5 min later PaCO2 usually was within 1 Torr of control. Tube breathing did not cause f to change. When external R was increased 1 cmH2O . l-1 . s by breathing through a conventional air collection system, f did not change at rest, but during exercise f was lower than during unencumbered breathing. These responses did not differ between normal, CBD, and hilar nerve-denervated ponies, and they did not differ when external VD or R were added at either the nares or tracheostomy.(ABSTRACT TRUNCATED AT 250 WORDS) |
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8750-7587 |
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PMID:4055600 |
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refbase @ user @ |
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100 |
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Author |
Hillidge, C.J.; Lees, P. |
Title |
Cardiac output in the conscious and anaesthetised horse |
Type |
Journal Article |
Year |
1975 |
Publication |
Equine veterinary journal |
Abbreviated Journal |
Equine Vet J |
Volume |
7 |
Issue |
1 |
Pages |
16-21 |
Keywords |
Anesthesia, Inhalation/*veterinary; Animals; Carbon Dioxide/blood; *Cardiac Output/veterinary; *Consciousness; Electrocardiography/veterinary; Ether, Ethyl; Female; Halothane; Heart Rate; Heart Ventricles/physiology; Horses/*physiology; Hydrogen-Ion Concentration; Male; Oxygen/blood; Posture |
Abstract |
Cardiac output in the horse was measured before and at predetermined times during 2-hour periods of thiopentone-halothane and thiopentone-diethyl ether anaesthesia. Left ventricular stroke volume was decreased to a similar extent during anaesthesia with each volatile agent, but a greater reduction in cardiac output occurred during halothane anaesthesia. This finding reflected the differing effects of halothane and ether on heart rate, a slight bradycardia occurring with the former agent while ether produced a small degree of tachycardia. The latter effect was attributed to enhanced sympathoadrenal activity. Changes in cardiac output and stroke volume were considered in relation to other factors, including arterial blood pH and tensions of oxygen and carbon dioxide. Positive correlations between some of these variables and cardiac function were established. With both volatile agents the reductions in stroke volume and cardiac output were related to the duration of anaesthesia, being greatest during the early stages. Possible reasons for the tendency of stroke volume and cardiac output to return towards control levels are discussed. |
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Edition |
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ISSN |
0425-1644 |
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Notes |
PMID:234842 |
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no |
Call Number |
refbase @ user @ |
Serial |
102 |
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Author |
Lees, P.; Tavernor, W.D. |
Title |
Influence of halothane and catecholamines on heart rate and rhythm in the horse |
Type |
Journal Article |
Year |
1970 |
Publication |
British journal of pharmacology |
Abbreviated Journal |
Br J Pharmacol |
Volume |
39 |
Issue |
1 |
Pages |
149-159 |
Keywords |
Anesthesia, Inhalation; Animals; Arrhythmia/*chemically induced; Atropine/pharmacology; Catecholamines/*pharmacology; Consciousness; Epinephrine/administration & dosage; Ethers; Female; Halothane/*pharmacology; Heart Rate/*drug effects; Horses; Hypercapnia/physiopathology; Isoproterenol/pharmacology; Male; Norepinephrine/pharmacology; Propranolol/pharmacology |
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0007-1188 |
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PMID:5420092 |
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no |
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refbase @ user @ |
Serial |
103 |
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Author |
Tavernor, W.D.; Lees, P. |
Title |
A pharmacological investigation of the influence of suxamethonium on cardiac function in the horse |
Type |
Journal Article |
Year |
1968 |
Publication |
Experientia |
Abbreviated Journal |
Experientia |
Volume |
24 |
Issue |
6 |
Pages |
582-583 |
Keywords |
Animals; Arrhythmia/chemically induced; Consciousness; Halothane; Heart/innervation; Heart Rate/*drug effects; Horses/*physiology; Oxygen; Propranolol/pharmacology; Receptors, Sensory/drug effects; Stimulation, Chemical; Succinylcholine/antagonists & inhibitors/*pharmacology; Sympathetic Nervous System/physiology; Tachycardia/chemically induced; Thiopental |
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0014-4754 |
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PMID:5697737 |
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no |
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refbase @ user @ |
Serial |
104 |
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Author |
Helton, W.S. |
Title |
Animal expertise, conscious or not |
Type |
Journal Article |
Year |
2005 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
8 |
Issue |
2 |
Pages |
67-74 |
Keywords |
Animals; *Behavior, Animal; *Cognition; *Consciousness; *Learning; Motor Skills; *Practice (Psychology) |
Abstract |
Rossano (Cognition 89:207, 2003) proposes expertise as an indicator of consciousness in humans and other animals. Since there is strong evidence that the development of expertise requires deliberate practice (Ericsson in The road to excellence: the acquisition of expert performance in the arts and sciences, sports and games 1996), and deliberate practice appears to be outside of the bounds of unconscious processing, then any signs of expertise development in an animal are indicators of consciousness. Rossano's argument may lead to an unsolvable debate about animal consciousness while causing researchers to overlook the underlying reality of animal expertise. This article provides evidence indicative of animals meeting each of the three definitions of expertise established in the scientific literature: expertise as a social construction, expertise as exceptional performance, and expertise as knowledge. In addition, cases of deliberate practice by non-human animals are offered. Acknowledging some animals as experts, regardless of consciousness, is warranted by the research findings and would prove useful in solving many issues remaining in the human expertise literature. |
Address |
Department of Psychology, Wilmington College, Wilmington, OH 45177, USA, deak_helton@yahoo.com |
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ISSN |
1435-9448 |
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PMID:15365876 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2511 |
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Author |
Griffin, D.R.; Speck, G.B. |
Title |
New evidence of animal consciousness |
Type |
Journal Article |
Year |
2004 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
7 |
Issue |
1 |
Pages |
5-18 |
Keywords |
Animal Communication; Animals; Awareness; *Behavior, Animal; *Consciousness |
Abstract |
This paper reviews evidence that increases the probability that many animals experience at least simple levels of consciousness. First, the search for neural correlates of consciousness has not found any consciousness-producing structure or process that is limited to human brains. Second, appropriate responses to novel challenges for which the animal has not been prepared by genetic programming or previous experience provide suggestive evidence of animal consciousness because such versatility is most effectively organized by conscious thinking. For example, certain types of classical conditioning require awareness of the learned contingency in human subjects, suggesting comparable awareness in similarly conditioned animals. Other significant examples of versatile behavior suggestive of conscious thinking are scrub jays that exhibit all the objective attributes of episodic memory, evidence that monkeys sometimes know what they know, creative tool-making by crows, and recent interpretation of goal-directed behavior of rats as requiring simple nonreflexive consciousness. Third, animal communication often reports subjective experiences. Apes have demonstrated increased ability to use gestures or keyboard symbols to make requests and answer questions; and parrots have refined their ability to use the imitation of human words to ask for things they want and answer moderately complex questions. New data have demonstrated increased flexibility in the gestural communication of swarming honey bees that leads to vitally important group decisions as to which cavity a swarm should select as its new home. Although no single piece of evidence provides absolute proof of consciousness, this accumulation of strongly suggestive evidence increases significantly the likelihood that some animals experience at least simple conscious thoughts and feelings. The next challenge for cognitive ethologists is to investigate for particular animals the content of their awareness and what life is actually like, for them. |
Address |
Concord Field Station, Harvard University, Old Causeway Road, Bedford, MA 01730, USA |
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1435-9448 |
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PMID:14658059 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2549 |
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Author |
Pere, M.C. |
Title |
Maternal and fetal blood levels of glucose, lactate, fructose, and insulin in the conscious pig |
Type |
Journal Article |
Year |
1995 |
Publication |
Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
Volume |
73 |
Issue |
10 |
Pages |
2994-2999 |
Keywords |
Animals; Blood Glucose/*analysis; Catheterization/methods/veterinary; Consciousness/physiology; Female; Fetal Blood/*chemistry; Fructose/analysis/*blood; Insulin/analysis/*blood; Lactates/analysis/*blood; Pregnancy; Swine/*blood/physiology |
Abstract |
To study nutrition and metabolism in the fetal pig, a chronic catheterization method was developed that allows blood sampling in arteries and veins, at both the umbilical and uterine sources, in the conscious, unstressed animal. A catheter was inserted in the fetal aorta through a femoral artery, and another one was introduced in the umbilical vein. A catheter was put in a femoral artery of the sow so that its end was in the abdominal aorta. A fourth catheter was placed in a uterine vein draining the fetoplacental unit studied. This procedure was applied to 18 Large White primiparous sows at 99 d of gestation. Blood samples were drawn simultaneously using the four catheters before a meal at 103 d of pregnancy, and glucose, insulin, lactate, and fructose were determinated. Glycemia was 2.5 times higher in the sow than in the fetus. The extraction coefficient of glucose by the fetus amounted to 14% of the umbilical supply. The insulin level in the fetal pig was very low ( < 5 microU/mL). Lactate and fructose seemed to originate from the placenta. Blood lactate was 2.6 times lower in the sow than in the fetus, and its extraction coefficient by the fetus amounted to 8%. Fructose in the fetal blood was 2.3 times higher than that of glucose. Fructose was not utilized by the pig fetus. The present results obtained in the fetal pig are comparable to the conclusions drawn from studies with other species. |
Address |
Station de Recherches Porcines, Institut National de la Recherche Agronomique, Saint-Gilles, France |
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ISSN |
0021-8812 |
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Notes |
PMID:8617670 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2751 |
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Author |
Crook, J.H. |
Title |
On attributing consciousness to animals |
Type |
Journal Article |
Year |
1983 |
Publication |
Nature |
Abbreviated Journal |
Nature |
Volume |
303 |
Issue |
5912 |
Pages |
11-14 |
Keywords |
Animals; *Behavior, Animal; Cognition; *Consciousness; Evolution; Learning |
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ISSN |
0028-0836 |
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PMID:6843653 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2795 |
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Author |
Gallup, G.G.J. |
Title |
Do minds exist in species other than our own? |
Type |
Journal Article |
Year |
1985 |
Publication |
Neuroscience and Biobehavioral Reviews |
Abbreviated Journal |
Neurosci Biobehav Rev |
Volume |
9 |
Issue |
4 |
Pages |
631-641 |
Keywords |
Animals; Awareness; *Behavior, Animal; Child Psychology; Child, Preschool; *Cognition; Consciousness; Evolution; Humans; Infant; Language; Pan troglodytes; Philosophy; Psychological Theory; Species Specificity |
Abstract |
An answer to the question of animal awareness depends on evidence, not intuition, anecdote, or debate. This paper examines some of the problems inherent in an analysis of animal awareness, and whether animals might be aware of being aware is offered as a more meaningful distinction. A framework is presented which can be used to make a determination about the extent to which other species have experiences similar to ours based on their ability to make inferences and attributions about mental states in others. The evidence from both humans and animals is consistent with the idea that the capacity to use experience to infer the experience of others is a byproduct of self-awareness. |
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0149-7634 |
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PMID:4080281 |
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Equine Behaviour @ team @ |
Serial |
2808 |
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