. The brain from ape to man; a contribution to the study of the evolution and development of the human brain. Brain; Evolution; Pongidae. TROGLODYTES NICER, THE CHIMPANZEE :>â ):> of .urrat |n\, wIumi mtx ;j:i)(kI lood was in-m^^ proNick-cl, onr ol the animals oltfii sc'i/A'd aiintluT and shonk hini out ol slu'cr pleasure. At lirst one ol the annuals would taki' a stiek uiidi.'i' sueh proxociition and llnii^ it \ehc-niently at one ol the ehnnpanzees m his or her pro\iniit\. This also freciuently hap[)ened ni pla\', part leularlv with the athlelie I em ale Chiea, w ho was in the habit ol
. The brain from ape to man; a contribution to the study of the evolution and development of the human brain. Brain; Evolution; Pongidae. TROGLODYTES NICER, THE CHIMPANZEE :>â ):> of .urrat |n\, wIumi mtx ;j:i)(kI lood was in-m^^ proNick-cl, onr ol the animals oltfii sc'i/A'd aiintluT and shonk hini out ol slu'cr pleasure. At lirst one ol the annuals would taki' a stiek uiidi.'i' sueh proxociition and llnii^ it \ehc-niently at one ol the ehnnpanzees m his or her pro\iniit\. This also freciuently hap[)ened ni pla\', part leularlv with the athlelie I em ale Chiea, w ho was in the habit ol eret'pm^ up hehnid one ol her eompanions as tlu'v sat c|uieti\- at rest and, Irom lairl\- elose cpiarters, hurhn^ a stiek, and then takmg llight. Prom throwing stieks it was hut a short step to usiiiiz; handluls ol sand m this manner, and linall\' stones ol \aried size and weijzht. At lirst the Lhimpanzecs were not e\[)ert m these ballistie aeti\ities. Bem^ dedeient in the eoordma- tion ol hand, head and eyes, the\' did not succeed in \'ery accurate aim. Soon the throwing of stones became such a rulin<i; passion among the chim- panzees that some ol them became dangerously expert, particularl\ the gymnastic Chica, who learned to aim e.\cellentl\ and exprt'ssed her skill with equal satisfaction uj^on her lellow apes as well as lu'r human associates. These perlormances, whii'h were largel\' in the nature ol play and amusement, were by no means the only ones by which ihv chimpanzees showed a strong tendenc\' for manipulating w ith considerable skill objects in their surroundings. All of the animals made nests, and this was true from the early periods of infancy onward. V\\v full-grown chimpanzee, as might be expected, [)articularl\ the lull-gi'own lemale, has the best resLilts m this nest- building and reall\ does most remarkaliU' work in this line. Usuall\ in the evening, a heap of straw is carelull\ manipulated while the animal sits inside and begins to twist the ends of the
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbrain, booksubjectevo
