Related Experiment Video
Updated: Aug 3, 2026
08:22
Permanent Cerebral Vessel Occlusion via Double Ligature and Transection
Published on: July 21, 2013
Pathological changes in small cerebral arteries causing occlusion and haemorrhage
Journal of Cardiovascular Pharmacology
|January 1, 1984
Summary
Chronic hypertension damages brain arteries, causing microaneurysms. This leads to plasma leakage, lipohyaline changes, and either artery blockage (lacunar infarct) or rupture (intracerebral hemorrhage).
Area of Science:
- Neurology
- Vascular Biology
- Pathology
Background:
- Brain resistance arteries have limited muscle and elastic tissue.
- Chronic hypertension is a major risk factor for cerebrovascular diseases.
Purpose of the Study:
- To elucidate the pathological mechanisms linking chronic hypertension to brain microvascular damage.
- To explain the development of microaneurysms and subsequent complications in cerebral arteries.
Main Methods:
- Pathological examination of brain tissue.
- Analysis of microvascular structural changes in hypertensive models (implied).
Main Results:
- Chronic hypertension induces microaneurysms in brain resistance arteries at points of weakness.
- Plasma leakage into arterial walls results in lipohyaline change.
- These changes lead to either arterial occlusion (lacunar infarct) or rupture (intracerebral hemorrhage).
Conclusions:
- Hypertension-induced microvascular damage in the brain is a critical pathway to stroke.
- Understanding these mechanisms is vital for preventing and treating hypertensive cerebrovascular complications.
Related Concept Videos
01:10The Arch of Aorta
The coronary arteries, originating from the ascending aorta, bifurcate from two sinuses located within the ascending aorta. Positioned just above the aortic semilunar valve, these sinuses house essential aortic baroreceptors and chemoreceptors, crucial for maintaining cardiac function. The left coronary artery and the right coronary artery branch off from the left posterior and anterior aortic sinuses, respectively.
Encircling the heart, the coronary arteries form a ring-like structure before...
Encircling the heart, the coronary arteries form a ring-like structure before...
01:29Stroke: Introduction and Types
A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...
01:15Ischemic Stroke ll: Pathophysiology
An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
01:17Hemorrhagic Stroke l: Introduction
A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
01:29Hemorrhagic Stroke ll: Pathophysiology
A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
01:22Cerebral Edema ll: Pathophysiology
Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...