Symptoms of significant brain atrophy include progressive cognitive impairment involving multiple cognitive functions, otherwise known as dementia, seizures and aphasia, which is the disruption in the understanding or production of language or both.
The Senate majority leader has somewhat less official power than the Speaker of the House. This is because the vice president is technically the Senate's presiding officer, a ceremonial position that calls chiefly for casting a vote in the event of a tie.
Party leaders of the United States Senate. The Senate Majority and Minority Leaders are two United States Senators who are elected by the party caucuses that hold the majority and the minority. These leaders have the most time serving in the senate from both major parties. The current leaders are Republican Majority Leader Mitch McConnell of Kentucky and Democratic Minority Leader Chuck Schumer of New York. The current Assistant Majority Leader is Republican John Cornyn of Texas.