Author Archives: Yuling Chen

Stroke and Motor Rehabilitation

Stroke is the most common neurological disorder and is the primary cause of physical disability. After cancer and coronary artery disease, stroke is the third leading cause of death in the United States, with an incidence of at least 100 per 100,000 people. In Canada, there are more than 50,000 strokes a year. Every seven minutes, a Canadian dies of heart disease or stroke.

What is a Stroke

Stroke is also called the cerebrovascular disease which means it happens when blood flow to a certain brain area is cut off. Without the oxygen in the blood, brain cells start dying within minutes.

Here is a video understanding some basic concepts of stroke by an animated explanation.

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Video Credit: HealthSketch

Types

There are two main types of stroke:

The first type is called Ischemic Stroke. Due to lack of blood flow caused by a blood clot or fatty deposits lodging within a brain artery. Approximately 85% – 90%  of all stroke is due to ischemia.

The second type of stoke is the Hemorrhagic stroke, which is due to bleeding from a ruptured artery. It’s less common than an ischemic stroke, but it can be more serious. It can be a blood vessel in the brain balloons up and bursts, or a weakened one leaks.

The difference between the ischemic stroke and hemorrhagic stroke

Image Credit: FlintRehab

Causes

A common cause of ischemic stroke is the hardening of the arteries which is caused by plaques. Those plaques are mostly made of fat, cholesterol, and other substances build up in the arteries, leaving less space for blood flow. Therefore, a blood clot may stay in this narrow space and cause an ischemic stroke.

Risk factors that can be controlled include high blood pressure, high cholesterol, diabetes, blood vessel disease, heart disease, smoking, obesity, high alcohol consumption, poor diet, etc.

symptoms

The F.A.S.T test helps spot symptoms of stroke:

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F.A.S.T Test

Image Credit: sleepapnea.org

motor rehabilitation

At least 70% of people will survive a stroke, but they may have profound motor deficits. Most people lose their motor functions of the other side of the body (different from the side where stroke happens) after stroke. Thus, functional recovery through active rehabilitation training is essential to achieve increased independence and quality of life.

Muscle weaknesses are pervasive after a stroke. This can interfere with walking and other daily motor activities. Physical rehabilitation is an effective way to regain strength, balance, and coordination; whereas occupational therapy is essential for fine motor skills, such as using a knife and fork, writing and buttoning a shirt.

Stroke rehabilitation works the best after 24 hours to 48 hours of stroke occur. Most people make the biggest recovery during the first three months after stroke. By continuing exercising and practicing new skills help part of your brain take over new functions.

Here is a video talking about how Steve recovered his motor ability from rehabilitative technology after a stroke.

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Video Credit: Mary Free Bed Rehabilitation Hospital

 

Elaine Yuling Chen

 

 

How much do you know about Spina Bifida? A Neurodevelopment Disorder

What is Spina Bifida?

I believe some of you may have heard about neurodevelopment disorder like hydrocephaly. What about the disorder strong related to hydrocephaly – Spina Bifida. Literally speaking, Spina Bifida means the spine split into two. It happens within the first four weeks the fetus in the uterus. Due to the spinal column is not fully closed, the spinal cord inside is not covered and even exposed and protruded out of the spinal column. There are about 120 children born with Spina Bifida each year in Canada, and 90% of them can survive and become adults.

Image result for spina bifida

Image Credit: Mayo Clinic

 

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Video Credit: The Spina Bifida Resource Network

 

Spina Bifida has more than one type. What do they look like?

There are two main types of SB, Spina Bifida Occulta (SBO) and Spina Bifida Myelomeningocele (SBM).

SBO is the mildest case which does not show any symptoms of the condition. The defect is hidden under the skin, and the spinal nerves are not involved in the defect. This type of defect may be noticed early in life if there is an abnormal tuft or clump of hair, or small dimple or birthmark on the skin at the site where the spine is not formed correctly.

However, SBM, also known as open SB, is the most severe form which needs to be treated with surgical treatment as early as possible. The membrane and spinal nerves push through the opening between spinal column gap at birth, forming a sac on the baby’s back. In this situation, the spinal cord is exposed, causing partial or complete paralysis of the body.

Image result for spina bifida

Image Credit: familydoctor.org

Causes & Risk Factors

The specific reason for spina bifida is still not clear nowadays. It shows to result from a combination of genetic and environmental risk factors, such as family history of neural tube defects and folate deficiency during pregnancy.

Then how should we prevent this disorder? Scientists find out that folate plays a significant role in SB prevention. Low levels of the vitamin folic acid during pregnancy are linked to  SB.

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Image Credit: Babyment

how to treat the disorder?

Treatments for SB also depends on the type of SB. Children with SBO typically do not have any symptoms or complications, only routine pediatric care is needed. However, the child with SBM needs to be treated with surgery. The research finds out that fetal surgery can be an effective management strategy for SBM patients, resulting in a significant benefit to these patients, typically in improving motor function.

Another study investigates the neurodevelopment outcomes of preschool children with SBM treated with myelomeningocele closure. They found children who have undergone fetal myelomeningocele closure have average preschool neurodevelopment scores.

– Elaine Yuling Chen

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