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The blood–brain barrier is formed by the brain capillary endothelium and excludes from the brain 100% of large-molecule neurotherapeutics and more than 98% of all small-molecule drugs. [28] Overcoming the difficulty of delivering therapeutic agents to specific regions of the brain presents a major challenge to treatment of most brain disorders.
Poor diet in early childhood affects the number of neurons in parts of the brain. [1]Nutritional neuroscience is the scientific discipline that studies the effects various components of the diet such as minerals, vitamins, protein, carbohydrates, fats, dietary supplements, synthetic hormones, and food additives have on neurochemistry, neurobiology, behavior, and cognition.
Hypoxic conditions in severely anemic individuals may cause brain damage resulting in cognitive impairment. [32] When iron levels in the brain are disrupted neurophysiological mechanisms and cognition are affected, potentially resulting in long-term behavioral changes and may affect attention span, intelligence, sensory perception functions ...
Replacing red meat with plant-based protein sources such as nuts and legumes was associated with a 19% lower risk of dementia and 1.37 fewer years of cognitive aging, according to the study.
Brain herniation is associated with hyperventilation, extensor rigidity, pupillary asymmetry, pyramidal signs, coma and death. [10] Hemorrhage into the basal ganglia or thalamus causes contralateral hemiplegia due to damage to the internal capsule. [7] Other possible symptoms include gaze palsies or hemisensory loss. [7]
In neuroscience, the mass action principle suggests that the proportion of the brain that is injured is directly proportional to the decreased ability of memory functions. [1] In other words, memory cannot be localized to a single cortical area, but is instead distributed throughout the cortex. This theory is contrasted by functional ...
Kernicterus is a bilirubin-induced brain dysfunction. [1] The term was coined in 1904 by Christian Georg Schmorl.Bilirubin is a naturally occurring substance in the body of humans and many other animals, but it is neurotoxic when its concentration in the blood is too high, a condition known as hyperbilirubinemia.
Damage by glycation results in stiffening of the collagen in the blood vessel walls, leading to high blood pressure, especially in diabetes. [11] Glycations also cause weakening of the collagen in the blood vessel walls, [ 12 ] which may lead to micro- or macro-aneurysm; this may cause strokes if in the brain.