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.
Earth 's orbital plane is known as the ecliptic plane, and Earth's tilt is known to astronomers as the obliquity of the ecliptic, being the angle between the ecliptic and the celestial equator on the celestial sphere. It is denoted by the Greek letter Îµ.t an obliquity of zero, these lines point in the same direction i.e. the rotational axis is perpendicular to the orbital plane. Axial tilt differs from inclination. Because the planet Venus has an axial tilt of 177Â° its rotation can be considered retrograde, opposite that of most of the other planets.