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.
Legislative Branch: the leader of the Senate is the Vice President & the leader of the House of Reps is the Speaker of the House. Executive Branch: the president is the head of state and head of government of the United States of America as well as the commander and chief of the Armed Forces.