Brain of LB1, Homo floresiensis

The brain of Homo floresiensis was 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, specimen number Sts 5 (Australopithecus africanus), and specimen number WT 17000 (Paranthropus ae...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2005-04, Vol.308 (5719), p.242-245
Main Authors: Falk, Dean, Hildebolt, Charles, Smith, Kirk, Morwood, M. J, Sutikna, Thomas, Brown, Peter, Jatmiko, Saptomo, E. Wayhu, Brunsden, Barry, Prior, Fred
Format: Article
Language:English
Subjects:
Adults
Amygdala
Analysis
Animal morphology
Animals
Anthropology
Australopithecus africanus
Brain
Brain - anatomy & histology
Cephalometry
Cerebellum
Cognition & reasoning
Computer Simulation
Earth sciences
Earth, ocean, space
Exact sciences and technology
Female
Females
Frontal lobe
Hominidae - anatomy & histology
Hominidae - classification
Hominids
Homo erectus
Homo floresiensis
Homo sapiens
Humans
Observations
Organ Size
Paleontology
Pan troglodytes - anatomy & histology
Paranthropus aethiopicus
Primates
Principals
Science and Society
Sinuses
Skull
Specimens
Temporal lobe
Tomography, X-Ray Computed
Vertebrate paleontology
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Summary:The brain of Homo floresiensis was 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, specimen number Sts 5 (Australopithecus africanus), and specimen number WT 17000 (Paranthropus aethiopicus). Morphometric, allometric, and shape data indicate that LB1 is not a microcephalic or pygmy. LB1's brain/body size ratio scales like that of 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.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1109727