The functioning of the brains of sleeping dogs is similar to that of humans, and mapping this is an important step for researchers to infer from the aging processes of the human brain, the ELTE report for MTI emphasizes.
According to a new study by researchers at Eötvös Loránd University (ELTE) and the Hungarian Academy of Sciences (MTA), older dogs resemble humans in that the EEG waveform, known as a slow sleep spindle, is less common than juvenile canopy. Contrary to expectations, however, fast spindles do not become thinner, but multiply in old age. The exact cause of this phenomenon is not yet known, but yes, sleep spindles also affect sleep stability, learning, and intelligence.
EEG (electroencephalography) is a measuring device that can visualize electrical activity in the brain in the form of waves. In mammals, including dogs and humans, a series of short and fast waves sometimes appear in the deepest stages of sleep, these are the sleeper coils. In deep sleep, we usually see 4 waves per second, but sleep spindles run 9 to 16 waves in this amount of time. These are derived from the thalamus, which is the deepest part of the brain, which is the most important input for the brain in sensing and movement. Sleep reels also help with sleep stability and memory memory. Numerous studies on humans, rodents and cats have already investigated sleeping coils, but dogs are neglected, the report states.
According to Enikő Kubinyi, head of the ELTE Senior Family Dog Program, supported by the European Research Council, “Mapping brain canine aging processes is an important step in determining whether a dog is capable of modeling human cognitive aging. The effect of age on canine sleep coils The slow spindles of older dogs have a smaller amplitude when measured frontally between the two eyes and also have a lower incidence of slow sleep spindles registered in the middle of the head, but we were surprised to find that in older dogs fast spindles were more common than frontal drainage. In humans, this is more typical of adolescence, “says the ethologist.
More than one hundred and fifty 1-17 year old family dogs and their owners participated in the research. The dogs were able to sleep for three hours in a quiet room at the Eötvös Loránd University, together with their owners. As in human studies, EEG data were recorded using electrodes adhered to the skin surface, so this procedure was completely painless. All but eight of the dogs slept during the three hours.
“We have developed an automatic detection method that works in dogs,” explains Ivaylo Iotchev, the first author of a study published in Scientfic Reports. “This time we wanted to examine a large sample of whether spindle characteristics are affected by age, gender, and neutering. The human literature has been very concerned about the effect of hormonal and age changes on spindle activity. If these findings are true for canine sleep spindles, would confirm the notion that a dog can be a good model animal for understanding human evolution, aging, and brain function. So far, behavioral studies have proven the similarities between a human and a dog. In comparison to other model animals such as rodents, our dog is still terra incognita. he adds.
The new results support the hypothesis that dogs have human-like sleeping coils.
The local difference in spindle frequency is a strong argument for the distinction between “slow” and “fast” spindles in humans in dogs. “This is important because fast and slow spindles have different functions in humans,” says Borbála Turcsán, one of the authors of the study.
Motion pattern learning can be associated with fast spindles, while verbal learning and intelligence can be associated with slow spindles. The appearance of fast spindles showed similar gender differences in dogs as in dogs. For bitches, researchers found more, bigger and faster spindles. The difference was most significant in the female bitches.
According to Iotchev, “The fact that both dog sex and reproductive condition influenced spindle characteristics is the strongest argument in a non-invasive study that sex hormones have an effect on the expression of sleep spindles. that in humans and dogs similar mechanisms regulate the formation and modulation of spindles. “