Some animals can reflect upon, monitor, regulate their states of mind

Washington, September 15 (ANI): Conducting extensive research into animal cognition, psychologists at the University at Buffalo have found that some animals may share humans’ ability to reflect upon, monitor or regulate their states of mind.

“Comparative psychologists have studied the question of whether or not non-human animals have knowledge of their own cognitive states by testing a dolphin, pigeons, rats, monkeys and apes using perception, memory and food-concealment paradigms,” said Dr. J. David Smith, a comparative psychologist at the university.

“The field offers growing evidence that some animals have functional parallels to humans’ consciousness and to humans’ cognitive self-awareness,” he added.

He counts dolphins and macaque monkeys among such species.

Recounting the original animal-metacognition experiment with Natua the dolphin, Smith said: “When uncertain, the dolphin clearly hesitated and wavered between his two possible responses, but when certain, he swam toward his chosen response so fast that his bow wave would soak the researchers’ electronic switches.”

He added: “In sharp contrast, pigeons in several studies have so far not expressed any capacity for metacognition. In addition, several converging studies now show that capuchin monkeys barely express a capacity for metacognition. This last result,” Smith says, “raises important questions about the emergence of reflective or extended mind in the primate order. This research area opens a new window on reflective mind in animals, illuminating its phylogenetic emergence and allowing researchers to trace the antecedents of human consciousness.”

Smith describes metacognition as a sophisticated human capacity linked to hierarchical structure in the mind because the metacognitive executive control processes oversee lower-level cognition, to self-awareness because uncertainty and doubt feel so personal and subjective, and to declarative consciousness because humans are conscious of their states of knowing and can declare them to others.

Therefore, Smith says: “It is a crucial goal of comparative psychology to establish firmly whether animals share humans’ metacognitive capacity. If they do, it could bear on their consciousness and self-awareness, too.”

He concludes, “Metacognition rivals language and tool use in its potential to establish important continuities or discontinuities between human and animal minds.”

A research article describing his study has been published in the journal Trends in Cognitive Science. (ANI)

How brain waves fire in unison while paying attention

Washington, May 29 (ANI): While the neurons in human brains are known to start firing in unison when a person pays attention, scientists have now found the brain centre that controls this neural chorus.

MIT neuroscientists have found that neurons in the prefrontal cortex – the brain’s planning centre – fire in unison and send signals to the visual cortex to do the same, generating high-frequency waves that oscillate between these distant brain regions like a vibrating spring.

The waves, also known as gamma oscillations, have long been associated with cognitive states like attention, learning, and consciousness.

“We are especially interested in gamma oscillations in the prefrontal cortex because it provides top-down influences over other parts of the brain. We know that the prefrontal cortex is affected in people with schizophrenia, ADHD and many other brain disorders, and that gamma oscillations are also altered in these conditions.

Our results suggest that altered neural synchrony in the prefrontal cortex could disrupt communication between this region and other areas of the brain, leading to altered perceptions, thoughts, and emotions,” said senior author Robert Desimone.

The researchers explained this neural synchrony by using the analogy of a crowded party with people talking in different rooms-if individuals raise their voices at random, the noise just becomes louder.

But if a group of individuals in one room chant together in unison, the next room is more likely to hear the message, and if the people in the other room respond in the same way, the two rooms can communicate.

In the study, the researchers looked for patterns of neural synchrony in two “rooms” of the brain associated with attention – the frontal eye field (FEF) within the prefrontal cortex and the V4 region of the visual cortex.

By training two macaque monkeys to watch a monitor displaying multiple objects, and to concentrate on one of the objects, the researchers monitored neural activity in both the above regions of the brain.

They analysed the timing of the neural activity and found that the prefrontal cortex became engaged by attention first, followed by the visual cortex-as if the prefrontal cortex commanded the visual region to snap to attention.

The delay between neural activity in these areas during each wave cycle revealed the speed at which signals travel from one region to the other, which indicated that the two brain regions were talking to one another.

The study has been published in the journal Science. (ANI)