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Trepanning, also known as trepanation, trephination, trephining or making a burr hole (the verb trepan derives from Old French from Medieval Latin trepanum from Greek trúpanon, literally "borer, auger"), [1] [2] is a surgical intervention in which a hole is drilled or scraped into the human skull.
Trephination was when a small hole was drilled into a person's skull to let out demons, as that was an earlier belief for mental disorders. Bloodletting is when a certain amount of blood was drained out of a person, due to the belief that chemical imbalances resulted in mental disorders.
A combination of external frontal sinus trephination and intranasal endoscopy is used to approach the frontal sinus. Frontal sinus trephination also enhances the visualization in anatomy. The incision is made in the medial aspect of the eyebrow above, parallel to the hair line. A 4–5mm diameter hole is drilled into the anterior table of the ...
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Trephination was a primitive skull surgery used by the Nazca that relieved pressure on the brain from battle wounds or for ritual purposes. It entails the removal of one or more sections of bone from the skull (while the person is still alive). Evidence of trephination has been seen through the analysis of excavated skulls.
Definitions of education try to determine the essential features of education. Many general characteristics have been ascribed to education. However, there are several disagreements concerning its exact definition and a great variety of definitions have been proposed by theorists belonging to diverse fields.
[1] The definition of education has been explored by theorists from various fields. [2] Many agree that education is a purposeful activity aimed at achieving goals like the transmission of knowledge, skills, and character traits. [3] However, extensive debate surrounds its precise nature beyond these general features.
Human skull with evidence of trepanation found at Monte Albán in Oaxaca, Mexico.. Trepanation in Mesoamerica has been practised by a number of pre-Columbian cultures in the Mesoamerican region, dating from at least the mid-Preclassic era (ca. 1500 BCE), and continuing up to the late Postclassic, or ca. 1200 CE.