Parkinson´s Disease

Parkinson's ( or Parkinson´s disease or PD ) is a degenerative disorder of the central nervous system that often impairs the sufferer's motor skills and speech, as well as other functions. It is a progressive disease whose effects get worse over time.PD is the most common cause of chronic progressive parkinsonism, a term which refers to the syndrome of tremor, rigidity, bradykinesia ( slow movement ) and postural instability. While many forms of parkinsonism are "idiopathic" meaning that they are not caused by any other agent, secondary cases may result from toxicity most notably of drugs, head trauma, or other medical disordersSymptoms of Parkinson's...

Seasonal Affective Disorder

Seasonal affective disorder (also called SAD) is a type of depression that follows the seasons and is usually called winter depression. It usually begins in late fall or early winter and goes away by summer. SAD may be related to changes in the amount of daylight during different times of the year.With respect to prevalence, about half a million people in the United States may have winter depression. Another 10% to 20% may experience mild SAD. SAD is more common in women than in men. For adults, the risk of SAD decreases as they get older. SAD is more common in northern geographic regions, where the exposure to bright light is obviously reduced...