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Topic:Epinephrine
Epinephrine, also known as adrenaline, is a hormone and neurotransmitter produced by the adrenal glands and certain neurons in horses. It plays a significant role in the "fight or flight" response, preparing the horse's body to respond to stress or perceived threats. Epinephrine affects various physiological systems, including increasing heart rate, expanding air passages in the lungs, and mobilizing energy stores. In equine medicine, understanding the effects and regulation of epinephrine is important for managing stress-related conditions and evaluating cardiovascular and metabolic health. This page compiles peer-reviewed research studies and scholarly articles that explore the production, function, and clinical implications of epinephrine in horses.
Vascular responses in the equine digit. The digital circulation was isolated in 12 ponies under pentobarbital anesthesia. Blood flow was either controlled by a pump or measured under natural perfusion. The responses to rapid changes and stoppages of blood flow indicated no evidence of autoregulation or reactive hyperemia. Local administration of acetylcholine, histamine, and prostaglandins E1 and E2 decreased prevenous resistance, whereas epinephrine and serotonin caused prevenous constriction. Large doses of epinephrine and serotonin decreased venous caliber. The effects of prostaglandins A1 and F2alpha were variable. The equine di...
