The number of neurons in the brain's motor areas vastly exceeds the number of muscles, meaning that many
different patterns of neural activity could be responsible for the same movement.
Recent developments in electrophysiological and optical recording techniques permit us to simultaneously monitor the activity of large numbers of single units, opening up numerous possibilities for correlating
patterns of neural activity with mental phenomena such as thoughts, intentions and emotions.»
For instance, suppose that experiment after experiment showed that brain wave patterns deviate most
from patterns of neural activity when people are making what look like free choices.
It turns out that there is a
similar pattern of neural activity each time we become conscious of the same picture, but not if we process information from the image unconsciously.
But in an animal study published in Nature in 2012, Shenoy and his colleagues reported finding that much more is going on: Motor cortical neurons work as part of an interconnected circuit — a so - called dynamical system — to create
rhythmic patterns of neural activity.
«Just as pediatricians chart height and weight to track developmental milestones, we can
use patterns of neural activity to see where individuals fall within the typical range of variability for their age,» Schlaggar says.
To resolve this particular contradiction, we need to recall that our brains have limited attentional resources — an attentional bottleneck results because only a
single pattern of neural activity can exist at a time.
The analysis allowed the researchers to identify and isolate the
specific patterns of neural activity that play out in this part of the brain when someone speaks, effectively enabling them to decode the brain's signals.
In a scientific first, researchers have observed in mice how the brain learns to
repeat patterns of neural activity that elicit the all - important feel - good sensation.
To the team, this fact then begged the question: Could the brain be trained to learn the
right pattern of neural activity normally involved in experiencing something enjoyable, and then replay that pattern at will to trigger a dopamine release?
During training sessions for BrainGate, the computer software learns to
associate patterns of neural activity with the intent to move a hand in a particular direction; it can use those intentions to pilot a computer cursor or, if all goes as planned, a motorized wheelchair.
These «delayed response tasks» suggest that working memory, at the level of brain cells, is the result of self -
sustaining patterns of neural activity — a group of neurons starts firing when the initial information is presented and maintains that firing internally when the stimulus is no longer present until the animal acts on that information.
The brain's basic functions — such as planning, decision - making, and behavior — require multiple brain areas and many thousands or millions of neurons, generating
complex patterns of neural activity.
The Washington University team was able to home in on 200
patterns of neural activity that change as a brain matures.
After analysis, the researchers were able to observe how
the patterns of neural activity were changing at each stage of each task.
«After repeated attempts, your brain gets better at recreating
that pattern of neural activity, and you get better at the game.»
THE brain has such fine control over the muscles used to speak that every sound produces a different
pattern of neural activity.
They speculate that the correlation could have something to do with
the patterns of neural activity surrounding the amygdala, the seat of fear in the brain.
The patterns of neural activity underpinning our selves keep changing throughout our lives as we learn to play checkers, read Thus Spake Zarathustra, fall in love, lose a job, win the lottery, get divorced, take Prozac.
Studies of meditation carried out with other techniques, such as magnetic resonance imaging and electroencephalography, have revealed different
patterns of neural activity — not surprisingly, since meditation is a complex behavior that evokes many different psychological states.
Furthermore, we asked what kind of sensory information induces
the pattern of neural activity observed during defensive bee ball formation and found that it may relate to the processing of thermal information.
Of all
the patterns of neural activity that could produce a given movement, the brain must pick one, and this «choice» may be illuminating regarding the basic principles at play.
By comparing muscle activity to neural activity across many such movements, we can employ mathematics and computer optimizations to ask why the brain «chooses» the observed
patterns of neural activity.
A new study by neuroscientists from centers such as the Champalimaud Centre for the Unknown in Lisbon and the University of California - Berkeley examined
the patterns of neural activity ingrained in the motor learning process of animals.