About human brain weight


ALTHOUGH we may regard it as fully admitted that the external appearance of the skull is no certain indication of the mental caliber of the individual, still there are many who are inclined to measure mind in terms of matter, believing it to be somehow dependent on the material constitution of the brain. Texture, the relative proportions of white and gray matter, and especially weight, are regarded as important factors in the problem, and it is on this latter subject that I have compiled and would offer what, so far as I have been able to ascertain, are trustworthy data concerning the weight of this important organ. The average brain-weight appears to be higher in cold than in warm climates. The "Lancet" has recorded the observation that men with large heads endure cold better than those with small ones. The Lapps have the largest heads in Europe in proportion to their stature; Norwegians next; then come Swedes, Danes, Germans, French and Italians. The Arab head is smaller than any of these. In the Pacific Ocean, far to the north, a people called Chugatshes, with remarkably large heads, occupy the shores and islands of Prince William Sound.

The average size of brain differs also at different stages of life; so that two men, each examining several hundred brains in the same city, may not obtain exactly the same results; because the subjects of the one may be chiefly aged, and those of the other young, though mature. In this case the latter would show a much greater average weight than the former, because of the natural decrease of the brain with advancing years. The following acknowledged authorities have presented the facts as they found them, after weighing a large number of brains:

Dr. John Reid, of the Royal Infirmary, Edinburgh, states the average weight of the encephalon at the age of from five to seven to be forty-three ounces, ten drachms; from twenty to thirty, fifty ounces, nine and a half drachms. The female brain in the human species is generally lighter in mature years than the male by five ounces, or ten per cent, while her stature is only eight per cent less.

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What is the average weight of the human brain?

    Answer   The average human brain weighs three pounds (1.36 kilograms). The average female brain capacity is 79.3 cubic inches, slightly smaller than the male

What is Weight of the human brain?

The average adult human brain weighs about 3 pounds (1,361 grams).

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