Alzheimer's disease & dementia

Nightmares in midlife may point to future cognitive decline, dementia

Distressing dreams in middle-aged and older adults may indicate a higher risk for future cognitive decline and all-cause dementia, according to a study presented at EAN 2024, the 10th Congress of the European Academy of Neurology, ...

Sports medicine & Kinesiology

Gymnastics is hard on the body—physical therapy can help

Watching Simone Biles, Frederick Richard, and other Olympic-level gymnasts compete with gravity-defying flips, twists, and spins across a variety of apparatuses, it's evident how much flexibility and strength the sport of ...

Fracture

A fracture is the (local) separation of an object or material into two, or more, pieces under the action of stress.

The word fracture is often applied to bones of living creatures (that is, a bone fracture), or to crystals or crystalline materials, such as gemstones or metal. Sometimes, in crystalline materials, individual crystals fracture without the body actually separating into two or more pieces. Depending on the substance which is fractured, a fracture reduces strength (most substances) or inhibits transmission of light (optical crystals).

A detailed understanding of how fracture occurs in materials may be assisted by the study of fracture mechanics.

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