Left-sided stroke: effects, treatment, and cure

A stroke occurs when a lack of blood supply or bleeding damages an area of ​​the brain. Strokes in different parts of the brain cause different symptoms. A left-sided stroke is a stroke that damages the left side of the brain. This type of stroke usually causes problems with language and speech, as well as physical symptoms that affect the right side of the body.

This article discusses stroke types, signs, effects, treatment, and prevention.

Ferruel / Daniel Fishel

Types of strokes

Most of the time, strokes occur due to a lack of blood supply to an area of ​​the brain. ischemia It is a decrease in the blood supply due to blockage or narrowing of the blood vessels.

Sometimes, a stroke can be caused by a hemorrhage (bleeding) most often caused by a leaking blood vessel.


An ischemic stroke damages an area of ​​the brain that is fed by a blocked (blocked) blood vessel.

This type of stroke can be caused by atherosclerotic disease within the blood vessels of the brain (hardening and narrowing due to a buildup of cholesterol plaques). Changes in the blood vessels that lead to narrowing and stroke may also be caused by high blood pressure, diabetes, and smoking.

Ischemic strokes may also occur because a blood clot travels to the brain from the heart or carotid artery.


A hemorrhagic stroke can be caused by a ruptured brain aneurysm (a swollen area in the wall of an artery), a damaged blood vessel that leaks, or damage that occurred during an ischemic stroke.

A hemorrhagic stroke can cause tissue death (infarction) in the area of ​​the brain that is fed by the hemorrhagic blood vessels. In addition, the accumulation of blood can cause further damage in adjacent areas.

Brain damage from a hemorrhagic stroke can lead to seizures (uncontrolled electrical disturbances in the brain) due to the irritation caused by the bleeding. In some people, seizures can persist even after the blood is completely reabsorbed. This most commonly occurs when blood affects an area of ​​the brain that controls motor function.

Stroke signs

There are several signs of a clot on the left side. They include:

  • Weakness in the face, arm, and/or leg on the right side of the body
  • Decreased sensation on the right side of the body
  • Effective or unclear speech
  • Speak fluently but with incorrect content or without words
  • Difficulty understanding language
  • Changes in visual perception
  • Sharp and sudden pain in the head
  • Sudden dizziness or loss of balance
  • confusion
  • Left-sided sensory and motor symptoms if the stroke involves areas known as the cerebellum and brainstem

Get immediate medical attention if you or anyone else experiences any of these symptoms. A stroke is a medical emergency that can rapidly worsen and cause disability or death. Long-term effects can be reduced if treatment is started right away.


The lasting effects of a left-sided stroke range from mild to severe, depending on the size of the stroke and the timing of treatment.

Hemiplegia and right-sided hemiparesis

Hemiplegia and hemiplegia can occur on the right side of the body after a left-sided stroke, namely:

  • hemiplegia It is a complete paralysis, and it can affect the right side of the face, arm and/or leg after a left-sided stroke.
  • half double It is partial weakness with some residual strength.

Immediately after a left-sided stroke, a right-sided body hemiplegia or hemiplegia will appear. After months or more, weakened areas of the body can gradually become stronger and more toned. Individuals with moderate to severe impairment are more likely to develop spasticity, with muscle stiffness and tightness.

Loss of sensation on the right side

Sensation impairment on the right side of the body can occur after a stroke involving the left sensory cortex or left inner capsule. Sensation impairment can involve the face, arm, and/or leg, and sometimes the trunk.

Sensory impairment can indirectly affect your ability to control your body because you rely on sensory feedback to coordinate your movements.

In addition to decreased sensation, paresthesia can sometimes occur in the same areas where sensation is diminished. crawl They include numbness, tingling, burning, or a stinging sensation. It can occur when a specific area of ​​the body is touched or without a stimulus.


Strokes on the left side are known to be caused by aphasia, which is a language deficit. There are several types of aphasia, and it occurs when one or more speech areas of the brain are damaged.

Wernicke’s aphasia, also called fluency aphasia, causes difficulty understanding language. A person with this type of aphasia can speak fluently, but the words are meaningless. Wernicke’s aphasia can occur when there is damage to the language area near the left sensory cortex of the brain.

Broca’s aphasia is a type of language deficit in which a person may have complete or mild language impairment, with difficulty forming words and sentences. This type of aphasia occurs when there is damage to the language area near the left motor cortex of the brain.

Language Centers

Aphasia occurs when language areas of the brain are damaged. Language is usually located in the left hemisphere of the brain. For nearly all right-handed people, language functions are located in the left side of the brain. Some left-handed people have language centers on the right side of the brain.

Inability to speak

letter Apraxia Difficulty in the brain controlling the motor movements of speech. Unlike dysphagia, It is not specific for damage to one side of the brain and affects speech and swallowing, and apraxia of speech is a type of language impairment.

Apraxia of speech can begin during childhood due to developmental conditions, or it can occur as a result of damage to the left insular cortex, an area deep in the left hemisphere of the brain.


After a stroke affecting the left half of the brain, a person can develop difficulty thinking and making decisions. Often described as executive dysfunction, these cognitive defects can be caused by damage to the left frontal lobe, left temporal lobe, or left parietal lobe. In general, a larger stroke would be expected to cause severe cognitive impairment.

homonymous brat

After a left-sided stroke that involves the temporal lobe, parietal lobe, or occipital cortex in the back of the brain, a person can have vision defects on the right side. Homonymous hemianopia of left stroke is the loss of vision in the right visual field of both eyes. It can affect the upper or lower field of vision, or both.

treatment or treatment

Stroke should be treated as soon as symptoms begin. Calling emergency transportation to the hospital is important to get prompt and appropriate medical attention upon arrival.

Treatment may include blood thinners, blood pressure control, and fluid management. Sometimes an interventional procedure may be needed to remove a blood clot or to relieve pressure inside the skull. Advanced imaging may be required in the emergency department to help determine the risks and benefits of any potential intervention.

After your condition is stabilized, treatment focuses on recovery and rehabilitation. Physical and occupational therapy can help improve your motor control and make you as independent and physically able as possible.

After a stroke, patients who qualify and complete a course of intensive/acute rehabilitation may have better outcomes and lower mortality (death rates) than those who do not receive such care.

In addition, speech therapy is often needed to manage aphasia, cognitive difficulties, and limitations with safe swallowing. All neurological rehabilitation takes time but can greatly help a person improve their ability to communicate with others and function independently.


Stroke prevention is a comprehensive strategy that includes reducing the risk of cerebrovascular disease. Prevention includes medications, diet and lifestyle methods.

Stroke prevention includes:

  • Quit Smoking
  • Control of cholesterol and triglycerides
  • blood pressure monitoring
  • control blood sugar
  • Treating heart conditions, including arrhythmias such as atrial fibrillation

After a stroke, these problems need to be taken care of in the long term.


A left-sided stroke affects the left side of the brain and the right side of the body. This type of stroke can also cause problems with cognition and language, which can include either difficulty understanding, speaking, or both.

A stroke is a medical emergency, and prompt treatment can help prevent disability or death. Recovery after a left-sided stroke includes physical rehabilitation, as well as speech and language therapy.

Word from Verywell

A left-sided stroke can affect your life. It can cause weakness and communication problems that interfere with your ability to live your life the way you did before the stroke. These potential effects have a major impact on stroke survivors and their loved ones.

After a stroke, seek support to get the help you need to recover. It can take time and hard work, but it’s important to be patient and maintain connections. Friends and family can be of great help by learning the effects of a left-sided stroke and adjusting expectations, especially with communication.

Frequently Asked Questions

  • How common are left-sided strokes?

    Left side strikes occur as frequently as right side strikes. According to the Centers for Disease Control and Prevention (CDC), each year more than 795,000 people in the United States have a stroke.

  • Which side of the brain is worse when having a stroke?

    The effects of a stroke on both sides of the brain can range from mild to disabling. After a left-sided stroke, language can be a major problem, and after a right-sided stroke, neglecting the left side of the body can be a major problem.

  • How long does it take to recover from a left side stroke?

    It depends on how severe the stroke is and how much damage has been done. It may take months or longer to improve after a stroke. A person may recover almost completely or may have significant permanent disabilities after a stroke.

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