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What is Post Traumatic Stress Disorder?


The Diagnostic and Statistical Manual of Mental Disorders Fifth Edition or (DSM-5) states that PTSD is caused by ‘Exposure to actual or threatened death, serious injury, or sexual violence …’. The DSM-5 then describes in great detail how a person can be exposed to these traumatic circumstances along with symptoms and behaviours that commonly occur with such an exposure. These exposures described in the DSM-5 include:

· Directly experiencing the traumatic event.

· Witnessing, in person, the event(s) as it occurred to others.

· Learning that the traumatic event(s) occurred to a close family member or close friend. In cases of actual or threatened death of a family member or friend, the event(s) must have been violent or accidental.

· Experiencing repeated or extreme exposure to aversive details of the traumatic event(s) (ie: first responders collecting human remains, police officers repeatedly exposed to details of child abuse).

Post-traumatic stress disorder (PTSD) is a mental illness. A mental illness that we at OSI-CAN prefer to think of as an Operational Stress Injury or Occupational Stress Injury that one can recover from rather than to refer to it as a Disorder. PTSD or an OSI involves exposure to trauma involving death or the threat of death, serious injury, or sexual violence.

Some jobs or occupations put people in dangerous and traumatic situations. Military personnel, first responders (police, firefighters, and paramedics), doctors, and nurses experience higher rates of PTSD than other professions.

Something is traumatic when it is very frightening, overwhelming and causes a lot of distress. Trauma is often unexpected, and many people say that they felt powerless to stop or change the event. Traumatic events may include crimes, natural disasters, accidents, war or conflict, or other threats to life. It could be an event or situation that you experience yourself or something that happens to others, including loved ones.

PTSD or an OSI causes intrusive symptoms such as re-experiencing the traumatic event. Many people have vivid nightmares, flashbacks, or thoughts of the event that seem to come from nowhere. They often avoid places, people, conversations, or even things that remind them of the event—for example, someone who was hurt in a car crash might avoid driving.

PTSD or an OSI can make people feel very nervous or ‘on edge’. Many feel startled very easily, have a hard time concentrating, feel irritable, or have problems sleeping well. They may often feel like something terrible is about to happen, even when they are safe. Some people feel very numb and detached. They may feel like things around them aren’t real, feel disconnected from their body or thoughts, or have a hard time feeling emotions. People also experience a change in their thoughts and mood related to the traumatic event. For some people, alcohol or drugs can be a way to cope with PTSD or an OSI.

Why does PTSD not affect everyone equally?

While most people experience trauma at some point in their life, not all traumatic experiences lead to PTSD. We aren’t sure why trauma causes PTSD or an OSI in some people but not others, but it’s likely linked to many different factors. This includes the length of time the trauma lasted, the number of other traumatic experiences in a person’s life, their reaction to the event, and the kind of support they received after the event.

Trauma is not always a single event in the past. Some trauma, particularly repeated acts like abuse or trauma during wartime, can impact a person’s life far beyond the symptoms of PTSD. Some use other terms like ‘complex PTSD’ to describe these experiences.

For Further Detail:

Read up on PTSD or OSI in the OSI-CAN Manual

We at OSI-CAN do not see PTSD or Post-Traumatic Stress Disorder as a Disorder, we see it as an Injury you can recover from. If you are suffering from the symptoms of an Operational Stress Injury, then a PTSD or PTSI diagnosis is not required to get our help!


Our mission is to inspire hope and contribute to the continuous well-being and recovery process of Veterans and Front Line Protectors across Canada.

We seek to empower and encourage them to strive for recovery through peer and professional support while creating greater public awareness.


The target demographic of OSI-CAN are but are not limited to: former and serving members of the Canadian Armed Forces, Allied Armed Forces, the Royal Canadian Mounted Police and Frontline Protectors --- which include Municipal Police Services, CN Police Services, Emergency Medical Services, Fire Protection Services, Wildland Firefighters, Hospital Trauma personnel, Nurses, healthcare Workers, Social Workers, Animal Control Officers, Coroners, Indigenous Emergency Management, Victim Services Personnel, Emergency Communications Specialist, Corrections Officers, “Volunteer” First Responders, Conservation Officers, Aboriginal Emergency Services personnel, Tow Truck drivers who clean up accident scenes and their spouses/partners. This demographic was chosen due to the commonality of experiences they share through the service they provide to the country and community. We have a special interest and support volunteer first responders as they are not eligible for programs such as Workers' Compensation.

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Holding out hope for someone who may not be able to carry it for themselves.

This is something that we as peer supporters often do for those we speak with. What about our family? Our family is who we NEED to have hope for us, and who will be the ones to carry us through the dark days.


When someone is injured in any way, be it physically or psychologically, we know the family carries much of the weight in the recovery process. For a psychological injury it isn't as obvious what our families can do for us, yet what you do is so important.


You maintain the hope that we will recover and encourage us to keep seeking out the kind of help that resonates with us. Maybe that means that we need to see a different professional, need help in actually "leaving" the house or encouragement to eat or to eat better, drink less or not use anything that would be harmful.


We need a reason to heal when despair is at its worst and we think we will never recover. At first this is because we are trying to get back to who we were, not understanding that the person we were isn't the person we need to be any longer. It's something we learn through time and healing, not something we can be told. Once we stop trying to go back in time, we need your patience and support to not try to be who we were in the past, but rather the better person we are evolving into because of our recovery.


There can also be a profound amount of anxiety involved with panic attacks that are horrible to go through and awful to witness. We may not notice symptoms decreasing over time, or lessening in intensity but maybe you as our family might. When you notice any improvements, it is so important to let us know. Your perspective may help and when recovery is acknowledged, it is an empowering feeling that change is happening with each and every effort we make to heal and hearing that change is happening from someone close to us not only validates us but also helps give us strength for future change as well. . When you are there to remind us of how we were 1 month ago, or 6 months ago, helps us to know that we are getting better and there is no reason to think it won't continue to get better.


That ability to lend perspective when we don't have it is such a gift and is the most important thing you can often do for someone with an OSI.


Our family and friend group’s target demographic:


The spouses/partners, family members and close friends of former and serving members of: the Canadian Armed Forces, Allied Armed Forces, the Royal Canadian Mounted Police and Frontline Protectors --- which include Municipal Police Services, CN Police Services, Emergency Medical Services, Fire Protection Services, Wildland Firefighters, Hospital Trauma personnel, Nurses, Social Workers, Animal Control Officers, Coroners, Indigenous Emergency Management, Victim Services Personnel, Emergency Communications Specialist, Corrections Officers, “Volunteer” First Responders, Conservation Officers, Aboriginal Emergency Services personnel, and Tow Truck drivers who clean up accident. This demographic was chosen due to the commonality of experiences they share through the service they provide to the country and community.


We have a special interest and support volunteer first responders as they are not eligible for programs such as Workers' Compensation.

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OSI-CAN’s Annual Healing with Horses Retreat program uses a number of methodologies for trauma treatment to introduce participants to those same methodologies during the program. One major application of the modality Meaningful Movements is the application of Bilateral Movements. In a previous blog we discussed how bilateral movements causes a rewiring of the brain when using both sides of the body during any type of exercise and how science has actually proven this principle is true for healing an Operational Stress Injury or OSI.

By using bilateral movements in everything including art therapy, the Healing with Horses Retreat or HHR introduces how bilateral movements can be applied into our everyday lives. Whether it is doing artistic endeavours like making bracelets or lanyards with paracord or working with wood or drawing on a sheet of paper, or if it is exercise like swimming or walking while working your arms … bilateral movements are important to healing. Bilateral Movements and the HHR allow you to see how you can use both sides of your body in all parts of your lives, even if it is only in the leading of a horse.

We showed in the previous Blog about Bilateral Movements that the treatment of Trauma like in the case of PTSD. In the case of Bilateral Stimulation, we discovered that bilateral principles began the basis for some of the treatments of trauma like EMDR. By using those same principles in the rest of our lives, the human brain has the opportunity to heal directly from actions taken by your own effort.

While it is important to have a team of specialists involved in one’s care like Psychologists, Doctors, and more … It is important for a person to take on their own care as their focus. Even Psychologists tend to assign work to their patients as part of their healing process. But it is also known to be important to exercise as part of their healing. And applying bilateral movements to one’s own activities make it that one can help themselves and develop their healing journey.


We at OSI-CAN do not see PTSD or Post-Traumatic Stress Disorder as a Disorder, we see it as an Injury you can recover from. If you are suffering from the symptoms of an Occupational or Operational Stress Injury, then a PTSD or PTSI diagnosis is not required to get our help!

OSI-CAN Target Demographic:

The target demographic of OSI-CAN are but are not limited to: former and serving members of the Canadian Armed Forces, Allied Armed Forces, the Royal Canadian Mounted Police and Frontline Protectors --- which include Municipal Police Services, CN Police Services, Emergency Medical Services, Fire Protection Services, Wildland Firefighters, Hospital Trauma personnel, Nurses, healthcare Workers, Social Workers, Animal Control Officers, Coroners, Indigenous Emergency Management, Victim Services Personnel, Emergency Communications Specialist, Corrections Officers, “Volunteer” First Responders, Conservation Officers, Aboriginal Emergency Services personnel, Tow Truck drivers who clean up accident scenes, Persons who in the performance of their jobs are exposed to criminal acts of Trauma like Prosecutors as one example, and their spouses/partners. This demographic was chosen due to the commonality of experiences they share through the service they provide to the country and community. We have a special interest and support volunteer first responders as they are not eligible for programs such as Workers' Compensation.

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OSI-CAN Target Demographic

The target demographic of OSI-CAN are but are not limited to: former and serving members of the Canadian Armed Forces, Allied Armed Forces, the Royal Canadian Mounted Police and Frontline Protectors --- Municipal Police Services, CN Police Services, Emergency Medical Services, Fire Protection Services, Wildland Firefighters, Hospital Trauma personnel, Nurses, Healthcare Workers, Crown Prosecutors, Social Workers, Animal Control Officers, Coroners, Indigenous Emergency Management, Victim Services Personnel, Emergency Communications Specialist, Crisis Management Workers (such as Mobile Crisis, etc), Corrections Officers, “Volunteer” First Responders, Conservation Officers, Tow Truck drivers, and private sector First Responders.  Persons who in the performance of their jobs are exposed to criminal acts of Trauma. We also provide supports to the spouses and significant others of those exposed to such trauma.  This demographic was chosen due to the commonality of experiences they share through the service they provide to the country and community. We have a special interest and support volunteer first responders as they may not have proper access to support.

OSI-CAN is a program of:

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In Partnership with:

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With the Support of:

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