The Brain of LB1, Homo floresiensis

  title={The Brain of LB1, Homo floresiensis},
  author={Dean Falk and Charles F. Hildebolt and Kirk Smith and Michael J. Morwood and Thomas Sutikna and P. Brown and Jatmiko and E. Wahyu Saptomo and Barry S. Brunsden and Fred W. Prior},
  pages={242 - 245}
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… 

Comment on "The Brain of LB1, Homo floresiensis"

Consideration of more appropriate microcephalic syndromes and specimens supports the hypothesis of modern human microcephaly.

Brain size of Homo floresiensis and its evolutionary implications

New models of the brain size reduction in the evolution of H. floresiensis are constructed based on a sample from 20 worldwide modern human populations and show a more significant contribution of scaling effect than previously claimed.

LB1's virtual endocast, microcephaly, and hominin brain evolution.

Brain shape in human microcephalics and Homo floresiensis

Although microcephaly is genetically and clinically variable, virtual endocasts from a highly heterogeneous sample share similarities in protruding and proportionately large cerebella and relatively narrow, flattened orbital surfaces compared with normal humans, which have relevance for hypotheses regarding the genetic substrates of hominin brain evolution and may have medical diagnostic value.

The Homo floresiensis cranium (LB1): Size, scaling, and early Homo affinities

The results are consistent with hypotheses that suggest the Liang Bua specimens represent a diminutive population closely related to either early H. erectus s.

Homo floresiensis: microcephalic, pygmoid, Australopithecus, or Homo?

Pygmoid Australomelanesian Homo sapiens skeletal remains from Liang Bua, Flores: Population affinities and pathological abnormalities

It is proposed that Liang Bua 1 is drawn from an earlier pygmy H. sapiens population but individually shows signs of a developmental abnormality, including microcephaly.

Craniometric ratios of microcephaly and LB1, Homo floresiensis, using MRI and endocasts

The findings support but do not prove the contention that LB1 represents a pathological microcephalic Homo sapiens rather than a new species, (i.e., H. floresiensis), as the calculated cerebral/cerebellar ratios of the LB1 endocast fall outside the range of living normocephalic individuals.

Comment on "The Brain of LB1, Homo floresiensis"

New data on the 18,000-year-old type specimen LB1 of the dwarf hominin Homo floresiensis with regard to cranial capacity and its implications for human evolution are presented and the originally determined brain size is revised.

LB1 and LB6 Homo floresiensis are not modern human (Homo sapiens) cretins.

  • P. Brown
  • Geography
    Journal of human evolution
  • 2012



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  • D. Falk
  • Geography, Environmental Science
  • 1983
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