Left Menu
Development News Edition

IISc study shows how brain region is involved in paying attention

PTI | Bengaluru | Updated: 13-09-2019 14:40 IST | Created: 13-09-2019 14:39 IST
IISc study shows how brain region is involved in paying attention
Image Credit: Flickr

Researchers at the Indian Institute of Science (IISc) have found how a region in the brain plays a key role in helping humans pay attention, an advance that may help develop new treatments for conditions like Attention Deficit Hyperactivity Disorder (ADHD). The study, published in the journal PNAS, noted that attention is associated with the outermost layer of the brain called the cerebral cortex, which was also linked to awareness, thoughts, memory, language, and consciousness.

According to the researchers, it was only recently that scientists began linking a midbrain region called the Superior Colliculus (SC) with attention. "SC is an evolutionarily conserved midbrain structure that can be found in all vertebrates, including fish, lizards, birds, and mammals. It is usually studied for its role in controlling eye movements," explained Devarajan Sridharan, Assistant Professor at the Indian Institute of Science (IISc) Bangalore and co-author of the study.

Earlier studies pointed out that monkeys were more attentive when the SC was stimulated and distracted when it was suppressed, the researchers noted. However, scientists did not know whether SC helped to filter out other sensory stimuli to help focus on the target visual inputs (increased choice bias), or if it was enhancing visual sensitivity.

To solve this puzzle, the researchers conducted two sets of non-invasive experiments on human participants. One was a behavior test where the researchers tracked changes in bias and sensitivity while 22 participants performed attention-demanding tasks.

In the other experiment, Varsha Sreenivasan, co-author of the study, and Sridharan studied the anatomy of SC in 82 participants, including the 22 who were tested earlier. In this experiment, they tracked certain fibers in the brain that connected the SC with other brain regions like the cortex by applying an imaging technique called diffusion Magnetic Resonance Imaging (dMRI), and a 3D modeling method called tractography.

Comparing the results of the two experiments, the researchers found that SC strongly connected with a part of the cerebral cortex called the parietal cortex, which was known to be associated with attention. The study also noted that the connectivity between the SC and the cortex could predict an individual's bias -- but not visual sensitivity.

"We also show that choice bias is stronger, on average, towards the right side of our visual field," Sridharan said in a statement. He added that SC connections in the cortex also mirrored an asymmetry for bias, further underscoring the relationship between SC and bias.

The researchers plan to study the activity of the SC with a different imaging technique called functional MRI (fMRI) that can identify increased blood oxygen levels in brain regions that are activated during tasks. "Through fMRI, we will investigate if SC's activity correlates with behavioral measures of sensitivity and bias. Our approach can also help understand if SC-cortex connection asymmetries are predictive of certain kinds of attention disorders such as ADHD," Varsha Sreenivasan, co-author of the study.



5G will be the key driving force for COVID-19 recovery: Here's how?

... ...

Canada’s COVID-19 pitfalls highlight need for integrated health information system

In the globalized world of today where outbreaks can spread far and wide within a matter of days, a global-level integrated health information system is ideal but Canadas provincial barriers show that the country lags much behind in deployi...

Pandemic must be impetus, not obstacle, for clean water access

To make matters worse, there are suspicions that the inadequacy of wastewater treatment methods in California, the rest of the USA, and indeed around the world may help to propagate the disease even more widely. ...

3D printing and the future of manufacturing post COVID-19

The on-demand, customizable, and localized manufacturing of product components facilitated by 3D printing has the potential to redefine manufacturing but there are certain technical, mechanical, and legal limitations that, unless ...


Latest News

Duo chairs of Nepal ruling party to meet today to end deadlock

Prime Minister and chairman of the NCP KP Sharma Oli and co-chair Pushpa Kamal Dahal are set to hold another round of discussion at 11 am on Friday about the possible ways to end the stalemate in the Nepal Communist Party NCP. On Thursday a...

Parts of UP likely to receive rainfall today: IMD

Some areas of Uttar Pradesh are likely to receive rainfall on Friday, said India Meteorological Department IMD.Rainthundershowers and lightning very likely during next 3 hours at isolated places over Lucknow, Barabanki, Unnao, Sitapur, Hard...

Daniel Kaluuya to star in Netflix adaptation of 'The Upper World' sci-fi novel

British actor Daniel Kaluuya has been roped in to star in Netflixs feature adaptation of the upcoming science-fiction novel The Upper World. The Black Panther actor will also bankroll the film along with Screen Arcades Eric Newman and Bryan...

In this Indian village, children speak Japanese

A fascination for robotics and technology has pushed students of a Zilla Parishad-run school in a remote village of Maharashtras Aurangabad district to learn Japanese. Gadiwat village, located 25km from Aurangabad city, may not have access ...

Give Feedback