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atrophy
Alzheimer's disease.
permeability
Changes in permeability are changes in the number of compounds that can pass through a membrane. The presence of certain chemicals or radiation can change the permeability of a membrane.
Diffuse global atrophy, or diffuse brain atrophy, is when the brain shrinks in size. It's more severe than the atrophy that occurs normally with aging.
diuse atrophy (muscle loss or weakness from lack of use)
Muscle atrophy refers to the wasting or loss of muscle tissue resulting from disease or lack of use.
Mild frontoparietal cortical atrophy is a condition characterized by shrinking of the frontal and parietal lobes of the brain. This can lead to symptoms such as difficulty with memory, problem-solving, and other cognitive functions. It is often associated with aging or neurodegenerative disorders.
atrophy
It has meanings in both electromagnetism and chemistry/earth sciences. Permeability in electromagnetism in means how receptive a material is to magnetization. Permeability in earth sciences can mean how well a material such as rock can transmit fluids.
loss of neurons
One is atrophy.
It means a loss of neurons and the connections between them in the brain. Atrophy means loss of cells
Atrophy is the reduction in size and therefore strength of a muscle. This often occurs due to prolonged disuse or malnutrition, but several other causes are possible. Paraspinous atrophy simple refers to the loss of muscle mass in the area surrounding the spine.
I believe that "Atrophy" is the word you are looking for.
Alzheimer's disease.
Low hysterisis loss and high permeability