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Henry Pickering Bowditch
Henry Pickering Bowditch (April 4, 1840 – March 13, 1911) was an American soldier, physician, physiologist, and dean of the Harvard Medical School. Following his teacher Carl Ludwig, he promoted the training of medical practitioners in a context of physiological research. His teaching career at Harvard spanned 35 years. He is known for Bowditch effect. Early life Henry P. Bowditch was born to the Massachusetts Bowditch family, noted for the mathematician Nathaniel Bowditch, his grandfather, and the archaeologist Charles Pickering Bowditch, his brother. He was born in Boston, Massachusetts to Jonathan Ingersoll Bowditch and Lucy Orne Nichols Bowditch. In 1861, he graduated from Harvard College, and then entered Harvard’s Lawrence Scientific School. His studies there were interrupted by his service in the Union Army during the American Civil War, where he rose to the rank of major in the Fifth Massachusetts Colored Cavalry Regiment. After graduation from Harvard Me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dean (education)
Dean is a title employed in academic administrations such as colleges or universities for a person with significant authority over a specific academic unit, over a specific area of concern, or both. In the United States and Canada, deans are usually university professors who serve as the heads of a university's constituent colleges and schools. Deans are common in private preparatory schools, and occasionally found in middle schools and high schools as well. Origin A "dean" (Latin: '' decanus'') was originally the head of a group of ten soldiers or monks. Eventually an ecclesiastical dean became the head of a group of canons or other religious groups. When the universities grew out of the cathedral schools and monastic schools, the title of dean was used for officials with various administrative duties. Use Bulgaria and Romania In Bulgarian and Romanian universities, a dean is the head of a faculty, which may include several academic departments. Every faculty unit of u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bowditch Effect
The Bowditch effect, also known as the Treppe phenomenon or Treppe effect or Staircase Phenomenon, is an autoregulation method by which myocardial tension increases with an increase in heart rate. It was first observed by Henry Pickering Bowditch in 1871. Mechanism The underlying cause of the Bowditch effect is an increase in the calcium concentration in the sarcoplasmic reticulum of cardiac muscle cells, and its increased release into sarcoplasm. One of the explanations for an increase in the intracellular calcium concentration is the inability of the Na+/K+-ATPase to keep up with influx of sodium at higher heart rates. When a higher heart rate occurs, for example due to adrenergic stimulation, the L-type calcium channel has increased activity. The sodium-calcium exchanger (which allows 3 Na+ to flow down its electrochemical gradient in exchange for 1 Ca++ ion to flow out of the cell) works to decrease the levels of intracellular calcium. As the heart rate becomes more r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William James
William James (January 11, 1842 – August 26, 1910) was an American philosopher and psychologist. The first educator to offer a psychology course in the United States, he is considered to be one of the leading thinkers of the late 19th century, one of the most influential philosophers and is often dubbed the "father of American psychology." Born into a wealthy family, James was the son of the Swedenborgian theologian Henry James Sr. and the brother of both the prominent novelist Henry James and the diarist Alice James. James trained as a physician and taught anatomy at Harvard, but never practiced medicine. Instead, he pursued his interests in psychology and then philosophy. He wrote widely on many topics, including epistemology, education, metaphysics, psychology, religion, and mysticism. Among his most influential books are '' The Principles of Psychology'', a groundbreaking text in the field of psychology; '' Essays in Radical Empiricism'', an important text in phil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Collins Warren (surgeon, Born 1842)
John Collins Warren (May 4, 1842 – November 3, 1927) was an American surgeon and president of the American Surgical Association. Early life and education Warren was born in Boston, Massachusetts, on May 4, 1842 to Dr. Jonathan Mason Warren and Annie Crowninshield.Johnson, Rossiter, ed. ''Twentieth Century Biographical Dictionary of Notable Americans. Vol. X.'' Boston, MA, USA: The Biographical Society, 1904. He was the grandson of famed surgeon John Collins Warren, Sr. and the Secretary of the Navy, Benjamin Williams Crowninshield, and also the great-grandson of surgeon John Warren. He was educated at Boston Latin School and at a private school run by Epes Sargent Dixwell, that was also attended by future Supreme Court Justice Oliver Wendell Holmes Jr. He graduated from Harvard College (1863) and from Harvard Medical School (1866). Warren then continued his medical studies abroad at the Imperial Hospital in Vienna, and at other hospitals in Berlin, Paris and London. Medic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter Bradford Cannon
Walter Bradford Cannon (October 19, 1871 – October 1, 1945) was an American physiologist, professor and chairman of the Department of Physiology at Harvard Medical School. He coined the term " fight or flight response", and developed the theory of homeostasis. He popularized his theories in his book ''The Wisdom of the Body'', first published in 1932. Life and career Cannon was born on October 19, 1871, in Prairie du Chien, Wisconsin, the son of Colbert Hanchett Cannon and his wife Wilma Denio. His sister Ida Maud Cannon (1877-1960) became a noted hospital social worker at Massachusetts General Hospital. In his autobiography ''The Way of an Investigator'', Cannon counts himself among the descendants of Jacques de Noyon, a French Canadian explorer and coureur des bois. His Calvinist family was intellectually active, including readings from James Martineau, John Fiske (philosopher), and James Freeman Clarke. Cannon's curiosity also led him to Thomas Henry Huxley, John Tynd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Étienne-Jules Marey
Étienne-Jules Marey (; 5 March 1830, Beaune, Côte-d'Or – 15 May 1904, Paris) was a French scientist, physiologist and chronophotographer. His work was significant in the development of cardiology, physical instrumentation, aviation, cinematography and the science of laboratory photography. He is widely considered to be a pioneer of photography and an influential pioneer of the history of cinema. He was also a pioneer in establishing a variety of graphical techniques for the display and interpretation of quantitative data from physiological measurement. Biography Marey started by studying blood circulation in the human body. Then he shifted to analyzing heart beats, respiration, muscles (myography), and movement of the body. To aid his studies he developed many instruments for precise measurements. For example, in 1859, in collaboration with the physiologist Auguste Chauveau and the watch manufacturer Breguet, he developed a wearable ''Sphygmograph'' to measure the puls ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis-Antoine Ranvier
Louis-Antoine Ranvier (2 October 1835 – 22 March 1922) was a French physician, pathologist, anatomist and histologist, who discovered the nodes of Ranvier, regularly spaced discontinuities of the myelin sheath, occurring at varying intervals along the length of a nerve fiber. Career Ranvier was born and studied medicine at Lyon, graduating in 1865 from the Ecole Préparatoire de Médecine et de Pharmacie. He moved to Paris after receiving the internship of Parisian hospitals. Here he founded a small private research laboratory on Rue Christine along with fellow intern Victor André Cornil, and together they later offered a course in histology to medical students which involved the careful examination of tissues under a microscope. Their course was unique in the time as microscopy had not been viewed favourably in medicine especially by Henri Ducrotay de Blainville (1777-1850) and Auguste Comte (1798-1857). Their histology course material became an influential textbook o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paris
Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of cities in the European Union by population within city limits, fourth-most populous city in the European Union and the List of cities proper by population density, 30th most densely populated city in the world in 2022. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, culture, Fashion capital, fashion, and gastronomy. Because of its leading role in the French art, arts and Science and technology in France, sciences and its early adoption of extensive street lighting, Paris became known as the City of Light in the 19th century. The City of Paris is the centre of the ÃŽle-de-France region, or Paris Region, with an official estimated population of 12,271,794 inhabitants in January 2023, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5th Regiment Massachusetts Colored Volunteer Cavalry
The 5th Regiment Massachusetts Colored Volunteer Cavalry (or 5th Regiment, Massachusetts Cavalry (Colored)) was a cavalry regiment from Massachusetts, that served in the Union Army during the American Civil War. Service The regiment was organized from January 9-May 5, 1864, at Camp Meigs, Readville, near Boston. From May 12, 1864, it served dismounted and equipped as infantry until the end of war. Detailed service The regiment fought at Baylor's Farm during the Second Battle of Petersburg and the Siege of Petersburg on June 14, 1864. At the end of June 1864, it was ordered to Point Lookout, Maryland, to guard a Confederate prison. They mustered out on October 31, 1865. Casualties The regiment lost 123 enlisted men; 7 enlisted men were killed or mortally wounded, and 116 enlisted men died of disease. Commanders * Colonel Henry S. Russell (March 7-June 14, 1864; wounded at Baylor's Farm) * Major Henry Pickering Bowditch (June 14-September 30, 1864) * Colonel Henry S. Russell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Major (rank)
Major is a senior military Officer (armed forces), officer military rank, rank used in many countries. When used unhyphenated and in conjunction with no other indicators, major is one rank above Captain (land), captain in armies and air forces, and one rank below lieutenant colonel. It is considered the most junior of the senior officer ranks. Background Etymologically, the word stems from the Latin word meaning "greater". The rank can be traced back to the rank of sergeant major general, which was shortened to sergeant major, and subsequently shortened to ''major''. When used in hyphenated or combined fashion, the term can also imply seniority at other levels of rank, including major general, denoting a low-level general officer, and sergeant major, denoting the most senior non-commissioned officer (NCO) of a military unit. The term major can also be used with a hyphen to denote the leader of a military band such as in Pipe-Major, pipe-major or drum-major. Links to major ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Civil War
The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of America, Confederacy ("the South"), which was formed in 1861 by U.S. state, states that had Secession in the United States, seceded from the Union. The Origins of the American Civil War, central conflict leading to war was a dispute over whether Slavery in the United States, slavery should be permitted to expand into the western territories, leading to more slave states, or be prohibited from doing so, which many believed would place slavery on a course of ultimate extinction. Timeline of events leading to the American Civil War, Decades of controversy over slavery came to a head when Abraham Lincoln, who opposed slavery's expansion, won the 1860 presidential election. Seven Southern slave states responded to Lincoln's victory by seceding f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
