The manner in which the pupil size changes in response to distractions can reveal the brain's focus and how it processes distractions, found in a new study.
Duke University researchers have looked into monkeys' eyes for insight into how the brain processes distractions and they've found that changes to pupil size in response to distractors might predict how well the brain focuses on a goal.
Eye Movements Aid in the Diagnosis of Neurological Disorder
A new low-cost method, which can detect neurological disorders by monitoring eye movements, has been developed by researchers.
Advertisement
The results may inform about the attention deficit hyperactivity disorder or other disorders in which mechanisms for maintaining attention go awry. The results could also inspire new ways to improve performance in school or on the job.
In recent years, researchers have gained a greater appreciation of the importance of eye movements and pupil size for focusing the mind, and how the brain might regulate these behaviors.
![Electroencephalogram]( "Electroencephalogram")
An electroencephalogram (EEG) detects electrical activity in the brain using electrodes attached to the scalp.
In the clinic, pupils might help diagnose or identify people at risk for mental illnesses, such as anxiety, or the effectiveness of potential therapies.
Michael Platt, director of the Duke Institute for Brain Sciences and the Center for Cognitive Neuroscience, said that where the eyes go and how much visual information gets in seems to tell a lot about what's going on inside the brain.
When humans are torn between paying attention to two different things, it triggers a "conflict" circuit in a brain region called the dorsal anterior cingulate cortex (dACC) which is part of a larger brain structure controlling rational thought and emotions.
Using a tiny sensor implanted in the dACCs of the monkeys, Platt's group was able to measure the electrical activity of single neurons. The team found a set of neurons that were active only when monkeys were completing the task and trying to override the distracting faces, but not when faced with either of the stimuli alone.
The more active the dACC neurons were, the better the monkeys were at tuning out the distracting faces in later trials. Even so, it was a difficult task.
The fight-or-flight response causes a release of the stress hormone noradrenaline, widens the pupils and allows a person to take in more information about their environment.
R. Becket Ebitz, a postdoctoral researcher at Stanford University, said that the dACC doesn't directly control pupil size, but it connects to another region of the brain that does. The dACC might well play a role in keeping people calm in the face of demands for their attention that might otherwise make them confused or stressed out.
The study is published in the journal Neuron.
Source: ANI
Electroencephalogram
An electroencephalogram (EEG) detects electrical activity in the brain using electrodes attached to the scalp.
Advertisement
In the clinic, pupils might help diagnose or identify people at risk for mental illnesses, such as anxiety, or the effectiveness of potential therapies.
Michael Platt, director of the Duke Institute for Brain Sciences and the Center for Cognitive Neuroscience, said that where the eyes go and how much visual information gets in seems to tell a lot about what's going on inside the brain.
When humans are torn between paying attention to two different things, it triggers a "conflict" circuit in a brain region called the dorsal anterior cingulate cortex (dACC) which is part of a larger brain structure controlling rational thought and emotions.
Using a tiny sensor implanted in the dACCs of the monkeys, Platt's group was able to measure the electrical activity of single neurons. The team found a set of neurons that were active only when monkeys were completing the task and trying to override the distracting faces, but not when faced with either of the stimuli alone.
The more active the dACC neurons were, the better the monkeys were at tuning out the distracting faces in later trials. Even so, it was a difficult task.
The fight-or-flight response causes a release of the stress hormone noradrenaline, widens the pupils and allows a person to take in more information about their environment.
R. Becket Ebitz, a postdoctoral researcher at Stanford University, said that the dACC doesn't directly control pupil size, but it connects to another region of the brain that does. The dACC might well play a role in keeping people calm in the face of demands for their attention that might otherwise make them confused or stressed out.
The study is published in the journal Neuron.
Source: ANI
Brilliant Human Brain - Animation
The most amazing and complex organ in the entire universe, the human brain continues to remain an enigma.
Advertisement
 Quiz on ADHDAttention Deficit/Hyperactivity Disorder (AD/HD, generally abbreviated as ADHD) is considered a "neurobehavioral developmental disorder". To know what this definition means and what the causes, symptoms and treatment for ADD are; give our ADHD quiz your best shot. | Advertisement
|
Advertisement
Recommended Readings
Latest Research News
Microgravity-induced bone loss in space, can be reduced by systemic delivery of NELL-1, a protein required for bone growth and its maintenance.
Researchers establish connections between Alzheimer's-linked genetic alterations and the functioning of brain cells.
Team at NeuroRestore introduces a groundbreaking gene therapy that has effectively promoted nerve regrowth and reconnection, post spinal cord injury.
Scientists aim to pinpoint particular functional pathways affected by these bacteria that may have an impact on skeletal health.
Consuming a diet rich in saturated fats triggers persistent, low-level inflammation within the body, ultimately contributing to the onset of metabolic syndrome.
