Skip to main content

Main menu

  • About Us
    • Leadership
    • Our Team
    • Vision, Mission and Values
    • Health and Economic Impact
    • Strategic Plan
  • Our Research
    • Research Focus
      • Brain Health
      • Cancer
      • Cardiovascular Conditions and Diseases
      • Digital Health
      • Health Policy
      • Immunity and Infectious Diseases
      • Joint Health and Mobility
      • Respiratory and Lung Health
      • Spinal Cord Injury and Rehabilitation
    • Research Centres and Programs
      • BC Centre on Substance Use
      • Centre for Aging SMART
      • Centre for Cardiovascular Innovation
      • Centre for Clinical Epidemiology and Evaluation
      • Centre for Lung Health
      • Djavad Mowafaghian Centre for Brain Health
      • Immunity and Infection Research Centre
      • International Collaboration On Repair Discoveries
      • Ovarian Cancer Research Centre
      • Vancouver Prostate Centre
      • Community Research Program
      • Emergency Medicine Research Program
      • Hematology Research Program
      • Skin Research Program
      • Other Research Focus Areas
    • News and Stories
    • Researcher Directory
    • Events and Workshops
  • Research Services
    • New to VCHRI
      • Working at VCHRI
      • Regulations and Training
      • Membership with VCHRI
    • Starting Your Project
      • Research Facilitation
      • Awards and Funding
      • Grant Management
      • Operational Approval
      • CST Cerner
    • Developing Your Project
      • Clinical Trials Administration
      • Clinical Research Unit
      • Research Privacy
      • Financial Policies and Procedures
    • Additional Support
      • Education and Training
      • Communications and Branding
      • Media Relations
      • Study Recruitment Support
      • Innovation and Industry Partnership
    • Internal Awards
    • Clinical Research
    • Innovation and Partnership
  • Participate in Research
    • Reasons to Participate
    • Participant Stories
    • Find a Study
    • Recruitment Support

User menu

  • Log in

Breadcrumb

  1. Home
  2. Our Research
  3. News and Stories
  4. Eye movements could be a window into brain health and function

Eye movements could be a window into brain health and function

Stories Feb 1, 2023 4 minutes

The ability to follow an object with one’s eyes and hands can reveal clues valuable to understanding disease and providing patient care.

Humans are excellent at following objects with their eyes, such as a ball. However, we are less refined at tracking accelerating objects. New research led by Vancouver Coastal Health Research Institute researcher Dr. Miriam Spering provides a clearer picture of the mechanisms behind this very human hindrance.  

“Motion tracking is important when crossing a street and anticipating the movement of oncoming traffic, as well as when walking down a sidewalk and avoiding bumping into other people,” notes Spering. “The results of this study provide further evidence that the human visual system has a hard time observing and reacting to accelerating objects.”

“Our study shows systematic errors in manually intercepting an accelerating object that has briefly disappeared. We think that the insights we can gain from data like this can help us develop biomarkers for certain disorders that affect hand-eye coordination.”

Published in the Society for Neuroscience’s eNeuro journal, the study involved Spering’s research group and was directed by PhD student Philipp Kreyenmeier. Their research involved an experiment with 16 adult research participants aged 19 to 37 years with normal or corrected-to-normal vision and no history of neurologic, psychiatric or eye disease. 

Study co-author, Philipp Kreyenmeier, demonstrates how research participants used eye and hand tracking technology, which records information in real time and at a high resolution.

Participants were seated at a computer and asked to track and anticipate the movement of a small black disk that traversed across the screen and behind a blind spot at a fixed speed, or that increased in speed at different rates.

Dr. Miriam Spering is a neuroscientist, psychologist and associate professor in the Department of Ophthalmology and Visual Sciences, and the Associate Dean Graduate and Postdoctoral Education in the Faculty of Medicine at the University of British Columbia.

 The research shows that, regardless of how long participants had to track an object, they failed to accurately gauge target acceleration when the object passed behind the blind spot. Instead, participants based their prediction on the speed the object was travelling before it disappeared behind the blind spot. 

“Even if our brain tells us that the object is accelerating or decelerating, our motor action is not adjusting.”

“By understanding these sensory processing errors, we are getting a bigger picture view of how sensory impairments might contribute to motor impairments. This knowledge could be used for the development of biomarkers of progressive diseases that affect motor skills, such as Parkinson’s disease, as we have recently done.”

The research team also found that eye and hand movements aligned, both landing several hundred milliseconds later for accelerating targets and earlier for decelerating targets. This means that both eye and hand movements were unable to detect target acceleration.

Tracking objects is a complex task that could help indicate disease

Human beings have evolved to see and perceive movement to aid in hunting and navigating our environment. However, the perceptual system we inherited from our primate ancestors is largely insensitive to acceleration. 

To date, there has been a lack of understanding about how modern humans transform our visual perception of acceleration into motor skills, such as moving out of the way of an oncoming vehicle. Spering explains that the reason for this is a complex neural system that interprets information from the eyes to the optic nerve in the brain, all the way to the visual cortex located at the back of the brain.

Many areas of the brain then go into action, including the medial temporal cortex (MT), the motion processing centre that interprets the speed and direction an object is travelling. 

“Whereas area MT can easily detect speed and direction, many, many nerve cells and complex computations in MT are needed to figure out if an object is accelerating,” says Spering.

“This also makes it possible for researchers to use eye movement to help interpret how well someone is seeing and tracking the movement of an object.”

To then interact with the object, information travels from MT to the prefrontal cortex where it is combined and transformed into a motor command that is sent down to the brainstem and cerebellum to, for example, move a hand to catch a ball.  

“When tracking an object, people often shift their gaze to where they anticipate the object will be,” notes Spering. 

The region of the brain responsible for coordinating a corresponding action to intercept an object also retains memories of how objects are supposed to move. For example, research has shown that people more accurately track and predict flyballs that move naturally with gravity than balls that do not.

A better understanding of the predictive pathways of hand-eye movements to track accelerating objects could support further scientific research and understanding about disease diagnosis and severity, says Spering. 

“This research can help explain the mechanisms that underlie healthy vision versus pathological vision to better understand the mechanisms and potential indicators of disease.”
 

Researchers

Miriam Spering

Related Articles

Brain drain: The connection between poor sleep and mild cognitive impairment

The mood-memory connection in treatment-resistant depression

COVID-19 linked to changes in the brain

Share:

  • Facebook
  • Linkedin
  • Twitter
  • Email

Related Research Centres/Programs

International Collaboration On Repair Discoveries

Djavad Mowafaghian Centre for Brain Health

Get the latest research headlines in your inbox

Subscribe

Recent News and Stories

Type
Announcement

Investigator Awards 2023 Recipients

Mar 21, 2023 award
Type
Stories

Ask an expert: Is my menstrual pain normal, or could I have endometriosis?

Mar 16, 2023 women, endometriosis, preventative
Type
Stories

Honing in on precision treatments for endometriosis

Mar 14, 2023 genetics, treatment options
See more news

Get updates!

Join our newsletter mailing list to stay up to date on features and releases.

Subscribe

Quick Links

  • News and Stories
  • Careers
  • Events
  • Media Enquiries

Follow Us

  • Twitter
  • LinkedIn

© 2023 VCHRI. All rights reserved.

  • Contact
  • Privacy Policy