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.
Although rare, itâs also possible to develop alien hand syndrome after brain surgery (to treat epilepsy, for example) or even during a severe migraine headache. A Helping Hand: Treatment Options for Alien Hand. Physicians have known about alien hand syndrome for more than a century, but it remains a challenging condition to treat.