Parkinsons Overview. Parkinsonâs disease affects the nerve cells in the brain that produce dopamine. Parkinsonâs disease symptoms include muscle rigidity, tremors, and changes in speech and gait. After diagnosis, treatments can help relieve symptoms, but there is no cure.ymptoms of Parkinson's disease differ from person to person. They also change as the disease progresses. Symptoms that one person gets in the early stages of the disease, another person may not get until later-or not at all. Symptoms typically begin appearing between the ages of 50 and 60.
Earth's axial tilt is responsible for the four seasons that occur during the year. When a hemisphere is tilted towards the sun, that region receives more sunlight and becomes warmer, while the hemisphere that is tilted away receives less solar energy and is cooler. Keep Learning.
Thatâs because the Earth tilts in relation to the sun. That is what creates the differences in the seasons and the annual warming and cooling cycles of the Earthâs Northern and Southern Hemispheres. The Earth is tilted 23.5 degrees on its axis, a straight line through the planet from the North Pole to the South Pole. The Earth spins around, or rotates, on this axis as it orbits the sun. The key here is that as the Earth orbits the sun, different regions on Earth tilt both towards and away from the sun, depending on the regionâs respective hemisphere.