Causes of Blood in Stool. Blood in the stool means there is bleeding somewhere in your digestive tract. Sometimes the amount of blood is so small that it can only be detected by a fecal occult test (which checks for hidden blood in the stool). At other times it may visible on toilet tissue or in the toilet after a bowel movement as bright red blood.
Parkinsonâs disease (PD) is a degenerative, progressive disorder that affects nerve cells in deep parts of the brain called the basal ganglia and the substantia nigra. Nerve cells in the substantia nigra produce the neurotransmitter dopamine and are responsible for relaying messages that plan and control body movement.
PARKINSON DISEASE CAUSE. The cause of Parkinson disease is not known. Normally, certain nerve cells (neurons) in the brain make a chemical called dopamine, which helps to control movement. In people with PD, these neurons slowly degenerate and lose their ability to produce dopamine.owever, the tremor of PD usually does not affect the head. The majority of people with Parkinson disease will notice a tremor at some point in the disease, though some do not. The side of the body that is first affected by the tremor also tends to be more severely affected throughout the course of the disease.