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.
The Speaker of the House of Representatives is Madam Nancy Pelosi (D-CA) The Senate Majority Leader is Senator Harry Reid (D-NV). The House of Representatives is led by:   The Speaker of the House House Majority Leader House Majority Whip House Minority Leader House Minority Whip.