Abstract
In humans the planum temporale is usually larger in the left hemisphere and related to Wernicke’s language complex. A slighter leftward asymmetry, unrelated to vocal perception, was reported in the chimpanzee. Searching for differences between the human brain and that of the chimpanzee, we analyzed the fiber composition in the sector of the corpus callosum containing fibers from the planum temporale. This sector was identified in chimpanzee and human myelin-stained materials by comparison with anatomical tract-tracing in the macaque monkey. The axon diameters in the planum temporale sector of the corpus callosum were not different in human and chimpanzee, suggesting that this feature of the output of the planum temporale was preserved since the common ancestor of both species and may not be uniquely related to language. However, the larger size of the human brain probably amplified slow and temporally dispersed conduction between the hemispheres. A trend with thicker axons dorsally and thinner axons ventrally in the corpus callosum was evident in human brain, but was much weaker, or absent in the chimpanzee.
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References
Buxhoeveden DP, Switala AE, Litaker M, Roy E, Casanova MF (2001) Lateralization of minicolumns in human planum temporale is absent in nonhuman primate cortex. Brain Behav Evol 57:349–358
Caminiti R, Ghaziri H, Galuske R, Hof PR, Innocenti GM (2009) Evolution amplified processing with temporally-dispersed, slow, neuronal connectivity in primates. Proc Natl Acad Sci USA 46:19551–19556
Chao YP, Cho KH, Yeh CH, Chou KH, Chen JH, Lin CP (2009) Probabilistic topography of human corpus callosum using cytoarchitectural parcellation and high angular resolution diffusion imaging tractography. Hum Brain Mapp 10:3172–3187
Creutzfeldt O, Ojemann G, Lettich E (1989) Neuronal activity in the human temporal lobe. I. Responses to speech. Exp Brain Res 77:451–475
Galaburda AM, Pandya DN (1983) The intrinsic architectonic and connectional organization of the superior temporal region of the rhesus monkey. J Comp Neurol 221:169–184
Gannon PJ, Holloway RL, Broadfield DC, Braun AR (1998) Asymmetry of the chimpanzee Planum Temporale: humanlike pattern of Wernicke’s brain language area homolog. Science 279:220–222
Geschwind N, Levitsky W (1968) Human brain: left–right asymmetries in the temporal speech region. Science 161:186–187
Hickok G, Poeppel D (2007) The cortical organization of speech processing. Nat Rev Neurosci 8:393–402
Hofer S, Merboldt KD, Tammer R, Frahm J (2008) Rhesus monkey and human share a similar topography of the corpus callosum as revealed by diffusion tensor MRI in vivo. Cereb Cortex 18:1079–1084
Hopkins WD, Nir TM (2010) Planum temporale surface area and grey matter asymmetries in chimpanzee (Pan Troglodites). The effects of handedness and comparison with findings in humans. Behav Brain Res 208:436–443
Hopkins WD, Tagliatela JP, Meguerditchian A, Nir T, Schenker NM, Sherwood CC (2008) Gray matter asymmetries in chimpanzee as revealed by voxel-based morphometry. Neuroimage 42:491–497
Jeanprêtre N, Kraftsik R (1989) A program for the computation of power and determination of sample size in hierarchical experimental designs. Comput Methods Programs Biomed 29:179–190
Pandya DN, Seltzer B (1986) The topography of commissural fibers. In: Leporé F, Ptito M, Jasper HH (eds) Two hemispheres-one brain. Functions of the Corpus Callosum. Alan Liss, New York, pp 47–73
Paxinos G, Huang X-F, Toga AW (2000) The rhesus monkey brain. Academic Press, London
Rilling JK, Glasser MF, Preuss TM, Ma X, Zhao T, Hu X, Behrens TE (2008) The evolution of the arcuate fasciculus revealed with comparative DTI. Nat Neurosci 11:426–428
Roberts JA, Robinson PA (2008) Modeling distributed axonal delays in mean-field brain dynamics. Phys Rev E 78:051901
Rosen GD, Sherman GF, Galaburda AM (1989) Interhemispheric connections differ between symmetrical and asymmetrical brain regions. Neuroscience 33:525–533
Shapleske J, Rossell SL, Woodruff PWR, David AS (1999) The planum temporale: a systematic, quantitative review of its structural, functional and clinical significance. Brain Res Rev 29:26–49
Tagliatela JP, Russel JL, Schaeffer JA, Hopkins WD (2009) Visualizing vocal perception in the chimpanzee brain. Cereb Cortex 19:1151–1157
Acknowledgments
Supported by the European Union contract # 029023, Paul BROCA II (GMI), the James S. McDonnell Foundation (PRH) and Compagnia di San Paolo (RC). We thank Dr. J.M. Erwin for providing access to the chimpanzee materials, Dr. R. Galuske for providing access to the human material, S. Valentiniene and B. Wicinski for technical assistance, Dr. C. Brogna for his help with the surgery, R. Kraftsik, and A. Battaglia-Mayer for their help with the statistical analysis.
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Innocenti, G.M., Caminiti, R. & Hof, P.R. Fiber composition in the planum temporale sector of the corpus callosum in chimpanzee and human. Brain Struct Funct 215, 123–128 (2010). https://doi.org/10.1007/s00429-010-0274-9
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DOI: https://doi.org/10.1007/s00429-010-0274-9