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Published Online March 3, 2005
Science
DOI: 10.1126/science.1109727
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Reports
Submitted on January 13, 2005
Accepted on February 11, 2005
The Brain of LB1, Homo floresiensis
Dean Falk 1*,
Charles Hildebolt 2,
Kirk Smith 2,
Mike J. Morwood 3,
Thomas Sutikna 4,
Peter Brown 3,
Jatmiko 4,
E. Wayhu Saptomo 4,
Barry Brunsden 2,
Fred Prior 2
1 Department of Anthropology, Florida State University, Tallahassee, FL 32306, USA.
2 Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA.
3 Archaeology & Palaeoanthropology, University of New England, Armidale, New South Wales 2351, Australia.
4 Indonesian Centre for Archaeology, JI. Raya Condet Pejaten No. 4, Jakarta 12001, Indonesia.
* To whom correspondence should be addressed.
Dean Falk , E-mail: dfalk{at}fsu.edu
The brain of Homo floresiensis is assessed by comparing a virtual endocast from the type specimen (LB1) with endocasts from great apes, Homo erectus, Homo sapiens, a human pygmy, a human microcephalic, Sts 5 (Australopithecus africanus) and WT 17000 (Paranthropus aeithiopicus). Morphometric , allometric and shape data indicate that LB1 is not a microcephalic or pygmy. LB1's brain size versus body size scales like an australopithecine, but its endocast shape resembles that of Homo erectus. LB1 has derived frontal and temporal lobes and a lunate sulcus in a derived position, which are consistent with capabilities for higher cognitive processing.
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