Lacunar stroke or lacunar infarct (LACI) is a type of stroke that results from occlusion of one of the penetrating arteries that provides blood to the brain's deep structures.
Symptoms. There are five different syndromes associated with lacunar infarcts, and which one a patient experiences depends on where in the brain the arterial blockage and subsequent damage to the brain occurs. The most common syndrome is a pure motor stroke, which affects up to half of stroke patients. A lacunar infarct gets its name from the changes that are grossly visible in the brain when it is examined postmortem. The parts of the brain that have died from lack of oxygen form open spaces, which are called lacunae. Pure sensory stroke. The infarct of this lacunar syndrome is usually in the thalamus. Symptoms consist of persistent or transient numbness and/or tingling on one side of the body (eg, face, arm, leg, trunk). Occasionally, patients complain of pain or burning, or of another unpleasant sensation. The lacunar hypothesis proposes that (1) symptomatic lacunes present with distinctive lacunar syndromes and (2) a lacune is due to occlusion of a single, deep penetrating artery generated by a specific vascular pathology. The above concept is controversial, because different definitions of lacunes have been used. When people ask, what is a lacunar infarct, the simple answer is that it is a stroke. However, because of the complex nature of the brain and its blood supply, a lacunar infarct implies a specific type of stroke, and by coming to this specific diagnosis, doctors can more accurately predict how a patient will recover. A lacunar infarct gets its name from the changes that are grossly visible in the brain when it is examined postmortem. The parts of the brain that have died from lack of oxygen form open spaces, which are called lacunae. A stroke is an event in which blood flow to the brain is interrupted or blocked, causing brain cells to become damaged and die. Strokes caused by blood clots are called ischemic strokes. Lacunar stroke is a type of ischemic stroke that occurs when blood flow to one of the small arterial vessels deep within the brain becomes blocked. According to the National Institutes of Health (NIH) , lacunar stroke represents about one-fifth of all strokes. So what is a lacunar infarct? This type of stroke involves blockage of one of the main arteries that supply structures deep inside the brain. Several distinct syndromes, or collections of related symptoms, have been described, which can affect the patient’s ability to recover from the stroke and regain normal function. A lacunar infarct gets its name from the changes that are grossly visible in the brain when it is examined postmortem. The parts of the brain that have died from lack of oxygen form open spaces, which are called lacunae. Lacunar infarcts lenticulostriate, thalamoperforating, and pontine perforating arteries, recurrent artery of Heubner). They result from occlusion of one of the small penetrating end arteries at the base of the brain and are due to fibrinoid degeneration.  Much of the current knowledge of lacunar strokes comes from C. Miller Fisher 's cadaver dissections of post-mortem stroke patients. He observed  lacunae  (Latin for empty space) in the deep brain structures after occlusion of 200-800 μm penetrating arteries and connected them with 5 classic syndromes. A silent lacunar infarction (SLI) is one type of silent stroke which usually shows no identifiable outward symptoms thus the term silent. Individuals who suffer a SLI are often completely unaware they have suffered a stroke. Lacunar Infarct. without comments. A lacunar infarct is a type of silent stroke, which means it may not produce any outside symptoms. In many cases, patients are unaware when they suffer a lacunar stroke. Despite not causing any symptoms, this type of stroke still damages the brain and puts the patient at risk of major stroke attacks in future. In a lacunar stroke, there is blockage of small arteries branching from the main artery in the brain. This can cause significant damage to the cells in small parts of the brain and lead to death of certain parts of the brain tissue. The most common cause of a lacunar infarct is high blood pressure. Causes. Lacunar stroke is caused by lack of blood flow in smaller arteries that supply deep brain structures. A common cause is chronic high blood pressure, leading veins to narrow, making it easier for blood clots to block blood flow. Lacunar stroke is a type of ischemic stroke that occurs when blood flow to one of the small arterial vessels deep within the brain becomes blocked. According to the National Institutes of Health (NIH) , lacunar stroke represents about one-fifth of all strokes. Lacunar stroke or lacunar infarct (LACI) is a type of stroke that results from occlusion of one of the penetrating arteries that provides blood to the brain's deep structures. A silent lacunar infarction (SLI) is one type of silent stroke which usually shows no identifiable outward symptoms thus the term silent. Individuals who suffer a SLI are often completely unaware they have suffered a stroke.
http://lacunarinfarct.net/what-is-a-lacunar-infarct/ http://emedicine.medscape.com/article/322992-overview http://lacunarinfarct.net/what-is-a-lacunar-infarct/ http://www.healthline.com/health-slideshow/lacunar-stroke-symptoms http://lacunarinfarct.net/what-is-a-lacunar-infarct/ http://radiopaedia.org/articles/lacunar-infarct https://en.wikipedia.org/wiki/Lacunar_stroke http://lacunarinfarct.net/ http://www.healthline.com/health-slideshow/lacunar-stroke-symptoms https://en.wikipedia.org/wiki/Lacunar_stroke
what is lacunar infarct