Public Release: 

Hidden stroke impairment leaves thousands suffering in silence

Only 2 percent of people aware of aphasia, which affects a third of people who have had a stroke

Heart and Stroke Foundation of Canada

Most people are completely unaware of one of stroke's most common, debilitating but invisible impairments, according to the first awareness survey of its kind in Canada released today at the Canadian Stroke Congress.

Thirty community volunteers trained by the York-Durham Aphasia Centre, a March of Dimes Canada program, collaborated with researchers from two Ontario universities in a survey of 832 adults in southern Ontario. They found that only two per cent of respondents could correctly identify aphasia as a communication disorder affecting the ability to speak, understand, read or write.

The survey team recommends a national education campaign to promote awareness of aphasia and to increase the availability of speech-language therapy, knowledge of supportive communication strategies, as well as long-term programs and services available to people who live with this chronic communication disability.

"Aphasia is poorly understood," says neurologist Dr. Michael Hill, Co-Chair of the Canadian Stroke Congress. "The sudden loss of language after a stroke creates huge challenges for individuals and their families."

As many as 100,000 Canadians are living with chronic aphasia.

"About one third of all people who have strokes experience some degree of aphasia but despite this high prevalence, it just doesn't get much attention," says Rick Berry, project coordinator, who worked with clinical coordinator and speech-language pathologist Ruth Patterson on the survey. "We wanted to gather some Canadian data to compare with surveys that have been done in other countries."

Aphasia occurs when there is stroke damage to language and communication centres in the brain. It does not affect intelligence but can leave people unable to express themselves, find their words and respond when spoken to. Sometimes people with aphasia repeat what has been said to them, get stuck on words or misuse words. As a result of their communication disabilities, they are prone to isolation and depression.

"The public isn't familiar with communication problems, so they often mistake aphasia for intellectual impairment," says Elizabeth Rochon, co-author of the survey and Associate Professor of Speech-Language Pathology at the University of Toronto. "The lack of awareness is devastating to people with aphasia and their families."

The aphasia survey was conducted in public places in the Toronto area, including beaches, libraries, parks, bus stations and shopping centres. Survey respondents were between ages 18 and 90.

The research team found:

  • 32 per cent of people surveyed had heard the word "aphasia";
  • Only two per cent correctly identified aphasia as a communication disorder affecting speaking, reading, writing and understanding; and
  • In contrast, among those who had not heard of aphasia, 89 per cent had heard of stroke.

"Aphasia can be a frustrating barrier to recovery following a stroke," says Ian Joiner, director of stroke for the Heart and Stroke Foundation. He says that caregivers, patients and even medical professionals need to be aware of and better understand aphasia so that people can be referred to and access much needed supports like speech-language pathologists, assistive devices and support groups.


There are about 50,000 strokes in Canada every year and another 315,000 people living with the after-effects of stroke. The Canadian Stroke Congress is co-hosted by the Canadian Stroke Network, the Heart and Stroke Foundation and the Canadian Stroke Consortium.

The Canadian Stroke Network,, is a national research network headquartered at the University of Ottawa. It includes scientists, clinicians and health-policy experts committed to reducing the impact of stroke.

The Heart and Stroke Foundation,, a volunteer-based health charity, leads in eliminating heart disease and stroke, reducing their impact through the advancement of research and its application, the promotion of healthy living and advocacy. Healthy lives free of heart disease and stroke. Together we will make it happen.

For more information and/or interviews, contact

The CSC 2012 MEDIA OFFICE September 30 to October 2 at 403-218-7868

Cathy Campbell, Canadian Stroke Network, 613-852-2303 (cell)

Holly Roy, Heart and Stroke Foundation, 780-991-2323

Congress information is at

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