A wide range of illnesses, conditions and events can cause coma. Coma occurs when there is a serious problem with the brain's arousal system (the reticular activating system), or with its communications between other brain areas (such as the cerebral hemispheres) and the brain's activity becomes impaired.
Injury to a small region in the pontine tegmentum is significantly associated with coma. This brainstem site is functionally connected to 2 cortical regions, the AI and pACC, which become disconnected in disorders of consciousness. This network of brain regions may have a role in the maintenance of human consciousness.
People in a state of coma are alive but are unable to move or be aware of or respond to their surroundings. They lose their thinking abilities but retain non-cognitive function and normal sleep patterns. A person may appear fine, but will not able to speak or respond to commands.
In comatose patients, depending on the stage of their coma, the waveforms are altered. As the coma deepens, the EEG device will eventually show a flat line instead of a wave – this stage is considered to be the turning point between a living brain and a deceased brain.
Coma is generally the result of damage or interference with particular structures of the brain, and its length and depth provide a strong indication of the severity of brain injury. A coma means a person is in a state of unconsciousness.
Nearly every coma patient who reaches the state of post-traumatic amnesia will make a functional recovery. In fact, patients who transition from a coma to a minimally conscious state within 8 weeks are most likely to transition to post-traumatic amnesia and regain higher functions.
And the answer is yes. The brain is incredibly resilient and possesses the ability to repair itself through the process of neuroplasticity. This phenomenon is the reason why many brain injury survivors can make astounding recoveries.
Severe brain injury is usually defined as being a condition where the patient has been in an unconscious state for 6 hours or more, or a post-traumatic amnesia of 24 hours or more. These patients are likely to be hospitalised and receive rehabilitation once the acute phase has passed.
Can Your Loved One Hear You? During a coma, the individual is unconscious, meaning they are unable to respond to any sounds. However, the brain may still be able to pick up on sounds from loved ones. In fact, some studies suggest talking and touching a loved one while they are in a coma may help them recover.
Most people do come out of a coma
In some rare cases, a person might stay in a coma for several weeks, months or even years. Depending on what caused the person to go into a coma, some patients are able to return to their normal lives after leaving the hospital.
A person may enter a minimally conscious state after being in a coma or vegetative state. In some cases a minimally conscious state is a stage on the route to recovery, but in others it's permanent. As with vegetative state, a continuing minimally conscious state means it's lasted longer than 4 weeks.
And the answer is yes. The brain is incredibly resilient and possesses the ability to repair itself through the process of neuroplasticity. This phenomenon is the reason why many brain injury survivors can make astounding recoveries.
Severe brain injury is usually defined as being a condition where the patient has been in an unconscious state for 6 hours or more, or a post-traumatic amnesia of 24 hours or more. These patients are likely to be hospitalised and receive rehabilitation once the acute phase has passed.
Nearly every coma patient who reaches the state of post-traumatic amnesia will make a functional recovery. In fact, patients who transition from a coma to a minimally conscious state within 8 weeks are most likely to transition to post-traumatic amnesia and regain higher functions.
Post-traumatic amnesia typically occurs after a survivor wakes up from a coma, a period of unconsciousness. During this time the survivor may not be able to recall certain memories. This can last from a few minutes to a couple weeks, depending on the severity of the brain injury.
Annie Shapiro (1913–2003) was a Canadian apron shop owner who was in a coma for 29 years because of a massive stroke and suddenly awakened in 1992. Apart from the patients in the true story Awakenings, Shapiro was the longest a person has been in a coma like state and woken up.
Most people do come out of a coma
In some rare cases, a person might stay in a coma for several weeks, months or even years. Depending on what caused the person to go into a coma, some patients are able to return to their normal lives after leaving the hospital.
Usually, coma patients have their eyes closed and cannot see what happens around them. But their ears keep receiving sounds from the environment. In some cases, the brains of coma patients can process sounds, for example the voice of someone speaking to them [2].
Other studies have shown that up to 20 percent of patients in various vegetative states can hear and respond on at least some level. But at least some of the responses seen could be dismissed as simple reflexes, or at best akin to someone in a dream state responding to stimuli.
Being comatose is being in a coma, unconscious and unable to communicate, often for long periods of time. A bad illness or unexpected accident or injury — especially to the head — can make you comatose and trapped inside a body that isn't working.
Coma patients might feel pleasure and pain like the rest of us.
Use objects with pleasant tactile sensations and different textures such as soft toys, silk scarves or books. Put a bunch of flowers in the person's room or spray their favourite perfume.