If the correlation coefficient has a positive value (above 0) it indicates a positive relationship between the variables meaning that both variables move in tandem, i.e. as one variable decreases the other also decreases, or when one variable increases the other also increases.
What Causes Alien Hand Syndrome? Despite the movements involved with alien hand syndrome, it isnât technically a movement disorder. Instead, it appears to occur as the result of some type of neurological damage. Common causes include: Stroke. Tumors. Various neurodegenerative diseases.
Raynaud's syndrome causes sudden temporary spasms in the blood vessels and arteries. The narrowed arteries, Blanchard says, constrict blood flow to the hands and fingers, decreasing circulation. Symptoms include cold hands and numb fingertips, in addition to a bluish tinge.