The MR image is a map of the distribution of the MR signal, and by manipulating the timing of the RF pulses and the delays before detecting the signal MRI is a sensitive tool for detecting subtle changes in brain anatomy. However, mapping brain structure is not the same as mapping brain function.
John Adams was seen and identified as an early leader in the Continental Congress by his peers, and his influence greatly aided the formation of the Declaration of Independence and the cause of separation from Great Britain.
He lived to see his son, John Quincy Adams, to become president. He died on July 4, 1826, the same day as Jeffersonâs death. Historical Significance: John Adams was an important figure throughout the revolution and the early years of the presidency.