Montana Field Guides. Of the three North American weasels (Genus Mustela), the Short-tailed Weasel is intermediate in size. Males are distinctly larger than females of the same age. During summer the fur is dark brown with white (not buff) under-parts, white feet, and white along the inside of the hind legs. The tip of the tail is black.
There's no single test for Parkinson's disease, but symptoms and response to treatment can guide diagnosis. Symptoms of Parkinson's disease vary from person to person, but they tend to get worse over time. The signs and symptoms of Parkinson's are divided into two categories: motor (movement-related) and non-motor.
By studying families with hereditary Parkinson's disease, scientists have identified several genes that are associated with the disorder. Studying these genes helps understand the cause of Parkinson's disease and may lead to new therapies.So far, five genes have been identified that are definitively associated with Parkinson's disease. 1  SNCA (synuclein, alpha non A4 component of amyloid precursor): SNCA makes the protein alpha-synuclein. In brain cells of individuals with Parkinson's disease, this protein aggregates in clumps called Lewy bodies. 2  Mutations in the SNCA gene are found in early-onset Parkinson's disease. 3  PARK2 (Parkinson's disease autosomal recessive, juvenile 2): The PARK2 gene makes the protein parkin.