Hemiparesis is partial weakness on one side of the body. It may involve the arms, hands, legs, face, or a combination. Show Stroke is the most common cause of hemiparesis; about 80% of stroke survivors experience it.A stroke occurs when brain cells are damaged due to either a blockage of blood flow or a break in a blood vessel supplying the brain. People who have hemiparesis are still able to move the affected side of the body, but with limited strength. This article will explore additional causes of hemiparesis, its common symptoms, and the treatment and recovery process. Laura Porter / Verywell CausesHemiparesis is a common result of injuries or disease of the nervous system, which includes the brain, spinal cord, and nerves. In addition to stroke, hemiparesis can be caused by a number of other medical conditions:
RecapMedical conditions that affect the brain, spinal cord, or nerves often cause hemiparesis. This includes stroke, traumatic injuries, and tumors. SymptomsThe most obvious symptom of hemiparesis is weakness of one side of the body. Symptoms correspond to the side of the brain or spine that has been damaged. An injury to the left side of the brain typically results in weakness on the right side of the body. An injury to the right side of the brain typically results in weakness on the left side of the body. Depending on the type of spine injury and the level of injury within the spine, hemiparesis may involve the same side of the body as the spine injury or may involve the opposite side. Symptoms of hemiparesis also can include:
Most often affecting the arms, legs, or both, hemiparesis makes it difficult to maintain a normal level of
independent daily activities, and it is one of the leading causes of disability. RecapAn injury to one side of the brain typically causes weakness on the opposite side of the body. Hemiparesis can make balance, coordination, walking, and grasping things difficult. DiagnosisIf you complain of any symptoms of hemiparesis, your healthcare provider will do a physical examination. It can be difficult to determine whether your symptoms are the result of weakness, pain, or another cause. The physical examination includes a test of your reflexes, sensation, and strength. Your healthcare provider will rate your strength on a scale of 1-5. This rating can also help when the same healthcare provider or other healthcare providers assess your strength at a later time, as it can be used as a comparison. Muscle Strength Rating ScaleThe rating scale for muscle strength is as follows:
One side of the body may become completely weak; this condition is called hemiplegia. Diagnosis of the cause of hemiparesis or hemiplegia can also be confirmed with imaging of the brain or spine and may include:
RecapDiagnosis often includes test of your reflexes, sensation, and strength and imaging of the brain and/or spine. Treatment and RecoveryTreatment of hemiparesis is first directed towards targeted treatment of the cause, whether it's a stroke, brain tumor, infection, or another condition. The goal of long-term treatment of hemiparesis is to strengthen motor skills and coordination and to improve your ability to manage everyday activities. Recovery and partial recovery from hemiparesis are possible with rehabilitation and therapy. Therapy and RehabilitationPhysical and occupational therapy are often important in the short-term and long-term recovery process. It can help stroke survivors regain movement even years after the stroke. Therapy and rehabilitation may include:
Home ModificationsModifications to the home may need to be made to accommodate and help increase mobility. Some of the modifications may include:
Fortunately, hemiparesis is not a progressive, or worsening, condition unless there is evidence of an aggressive growing brain tumor. SummaryHemiparesis is a weakness of one side of the body that can make mobility and everyday activities difficult. It commonly occurs due to injuries or conditions that affect the nervous system and the most common cause is stroke. Therapy and rehabilitation are an important part of the recovery process and can help with strength and mobility improvements over time. Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
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Jose Vega MD, PhD Thanks for your feedback! Why is the right side of my body so tight?When one side of the opposing muscles is stronger than the other, you have a muscle imbalance. For instance, if you regularly use the muscles on one side a lot more than the other, they get stronger muscles – and shorter and tighter. On the other side, the muscles get weaker – and longer and looser.
What does it mean when one whole side of your body hurts?Side pain can be a symptom of a wide variety of mild to serious diseases, disorders and conditions, such as infection, infarction, inflammation, indigestion, trauma, intestinal obstruction, and cancer. Side pain can occur on one or both sides of the torso at a time.
Why do my side muscles feel tight?Muscle stiffness typically occurs after exercise, hard physical work, or lifting weights. You may also feel stiffness after periods of inactivity, like when you get out of bed in the morning or get out of a chair after sitting for a long time. Sprains and strains are the most common reasons for muscle stiffness.
What is located on right side of body?Right Upper Quadrant. Organs found in this quadrant include: the liver, the gallbladder, duodenum, the upper portion of the pancreas, and the hepatic flexure of the colon. Pain in the right upper quadrant may be indicative of hepatitis, cholecystitis, or the formation of a peptic ulcer.
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