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Progressive overload not only stimulates muscle hypertrophy, but it also stimulates the development of stronger and denser bones, ligaments, tendons and cartilage. [5] Progressive overload also incrementally increases blood flow to regions of the body exercised and stimulates more responsive nerve connections between the brain and the muscles ...
A decrease in circulation in the brain vasculature due to stroke or injury can lead to a condition known as ischemia. In general, decrease in blood flow to the brain can be a result of thrombosis causing a partial or full blockage of blood vessels, hypotension in systemic circulation (and consequently the brain), or cardiac arrest. This ...
There are several theories as to why these blood vessels may become inappropriately permeable and allow the surrounding brain tissue to become swollen. The "vasogenic" theory posits that elevated blood pressure overcomes the normal capability of blood vessels in the brain to maintain a normal cerebral blood flow.
Cerebral blood flow (CBF) is the blood supply to the brain in a given period of time. [8] In an adult, CBF is typically 750 millilitres per minute or 15.8 ± 5.7% of the cardiac output. [9] This equates to an average perfusion of 50 to 54 millilitres of blood per 100 grams of brain tissue per minute. [10] [11] [12]
Posterior cerebral artery syndrome is a condition whereby the blood supply from the posterior cerebral artery (PCA) is restricted, leading to a reduction of the function of the portions of the brain supplied by that vessel: the occipital lobe, the inferomedial temporal lobe, a large portion of the thalamus, and the upper brainstem and midbrain.
Cerebral edema is commonly seen in a variety of brain injuries including ischemic stroke, subarachnoid hemorrhage, traumatic brain injury, subdural, epidural, or intracerebral hematoma, hydrocephalus, brain cancer, brain infections, low blood sodium levels, high altitude, and acute liver failure.
In the hospital, the blood pressure can be increased in order to increase CPP, increase perfusion, oxygenate tissues, remove wastes, and thereby lessen swelling. [32] Since hypertension is the body's way of forcing blood into the brain, medical professionals do not normally interfere with it when it is found in a person with a head injury. [6]
Patients with cerebellar degeneration experience a progressive loss of nerve cells (Purkinje cells) throughout the cerebellum. As well as this, it is common to incur an elevated blood protein level and a high volume of lymph cells within the cerebrospinal fluid , resulting in swelling and enlargement of the brain.