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.
Repeated and increasingly prolonged depletion of blood flow to the fingers can cause ulcers in the skin and tissue death (also called necrosis, see Figure 3). The other cause of cold hand or fingers is vaso-occlusion, which happens when one or more of the blood vessels in the hand or wrist become blocked. Raynaudâs Disease and Raynaudâs Phenomenon. There are many specific diseases of blood vessels that can cause vasoconstriction and vaso-occlusion.