Abstract
Shared tool use in our hominid ancestry is perhaps the most satisfactory explanation for human dextrality and left-hemisphere language lateralization. Recent palaeoarchaeological evidence suggests that brachiation preceded bipedalism, which in turn preceded advanced tool use, with all three preceding any dramatic increase in brain size and/or the development of speech-related neural structures. Shared tool use probably led to population dextrality, and then to the development of left-hemisphere centres for fine motor coordination and the mediation of serial, segmental, time-dependent and syntactic processes at sensory and more particularly motor levels, including the control of limbs, fingers and articulators. Such centres, initially developed for tool construction and use, would have occupied an intermediate position in the evolutionary sequence. Thus cortically-driven facial gestures may possibly have accompanied manual signing, modulating limbic vocalizations of affect, though a cortical-limbic distinction with respect to communication may be unwarranted. However, the uniqueness of human language is still a matter of debate both with respect to other primates and our own evolutionary ancestors.
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References
Annett, M. (1981). The genetics of handedness. Trends in the Neurosciences, 4, 256–258.
Balner, H. (1981). Genetic considerations: the major histocompatibility complex of primates — evolutionary aspects and comparative histogenetics. Philosophical Transactions of the Royal Society of London B, 292, 205–211.
Beck, B.B. (1980). Animal Tool Behavior: The Use and Manufacture of Tools by Animals. New York: Garland STPM Press.
Benton, A. (1979). Visuoperceptive, visuospatial and visuoconstructive disorders. In K.M. Heilman & E. Valenstein (eds.), Clinical Neuropsychology. pp. 186–232. Oxford: Oxford University Press.
Bever, T.G. & Chiarello, R.J. (1974). Cerebral dominance in musicians and non musicians. Science, 185, 137–139.
Bradshaw, J.L. (1980). Right hemisphere language: a review of interrelated issues. Brain and Language, 10, 172–188.
Bradshaw, J.L. & Gates, A. (1978). Visual field differences in verbal tasks: effects of task familiarity and sex of subject. Brain and Language, 5, 166–187.
Bradshaw, J.L. & Nettleton, N.C. (1981). The nature of hemispheric specialization in man. Behavioral and Brain Sciences, 4, 51–91.
Bradshaw, J.L. & Nettleton, N.C. (1982). Human Cerebral Asymmetry: A Systematic Account. Englewood Cliffs, NJ: Prentice Hall.
Bradshaw, J.L. & Sherlock, D. (1982). Bugs and faces in the two visual fields: task order, difficulty, practice and the analytic/holistic dichotomy. Cortex, in press.
Bradshaw, J.L. & Taylor, M.J. (1979). A word naming deficit in nonfamilial sinistrals? Laterality effects of vocal responses to tachistoscopically presented letter strings. Neuropsychologia, 17, 21–32.
Bradshaw, J.L., Gates, A. & Patterson, K. (1976). Hemispheric differences in processing visual patterns. Quarterly Journal of Experimental Psychology, 28, 667–681.
Bradshaw, J.L., Nettleton, N.C. & Taylor, M.J. (1981). Right hemisphere language and cognitive deficit in sinistrals? Neuropsychologia, 19, 113–132.
Cain, D.P. & Wada, J.A. (1979). An anatomical asymmetry in the baboon brain. Brain Behavior and Evolution, 16, 222–226.
Carmon, A. (1978). Spatial and temporal factors in visual perception of patients with unilateral cerebral lesions. In M. Kinsbourne (ed.), Asymmetrical Function of the Brain. pp. 86–98. Cambridge: Cambridge University Press.
Chapple, W.D. (1977). Role of asymmetry in the functioning of invertebrate nervous systems. In S. Harnad, R.W. Doty, L. Goldstein, J. Jaynes & G. Krauthamer (eds.), Lateralization in the Nervous System. pp. 3–22. New York: Academic Press.
Chi, J., Dooling, E.C. & Gilles, F.H. (1977). Left right asymmetries of the temporal speech areas of the human fetus. Archives of Neurology, 34, 346–348.
Collins, R.L. (1977a). Toward an admissible genetic model for the inheritance of the degree and direction of asymmetry. In S. Harnad, R.W. Doty, L. Goldstein, J. Jaynes & G. Krauthamer (eds.), Lateralization in the Nervous System. pp. 137–150. New York: Academic Press.
Collins, R.L. (1977b). Origins of the sense of asymmetry: Mendelian and non-Mendelian models of inheritance. Annals of the New York Academy of Sciences, 299, 283–305.
Coltheart, M., Patterson, K. & Marshall, J.C. (1980). Deep Dyslexia. London: Routledge & Kegan Paul.
Corballis, M.C. (1981). Toward an evolutionary perspective on hemispheric specialization. Behavioral and Brain Sciences, 4, 69–70.
Corballis, M.C. & Morgan, M.J. (1978). On the biological basis of human laterality: 1. Evidence for a maturational left-right gradient. Behavioral and Brain Sciences, 2, 261–236.
Cunningham, D.F. (1892). Contribution to the Surface Anatomy of the Cerebral Hemispheres. Dublin: Royal Irish Academy.
Curtis, G.H. (1981). Establishing a relevant time scale in anthropological and archaeological research. Philosophical Transactions of the Royal Society of London B, 292, 7–20.
Curtiss, S. (1977). Genie: A Psycholinguistic Study of a Modern Day Wild Child. New York: Academic Press.
Cutting, J.E. (1979). There may be nothing peculiar to perceiving in the speech mode. In J. Requin (ed.), Attention and Performance, VII. New York: Wiley.
Cutting, J.E. (1980). Sign language and spoken language. Nature, 284, 661–662.
Denenberg, V.H. (1981). Hemispheric laterality in animals and the effects of early experience. Behavioral and Brain Sciences, 4, 1–49.
Dennis, M. (1980a). Capacity and strategy for syntactic comprehension after left or right hemidecortication. Brain and Language, 10, 287–317.
Dennis, M. (1980b). Language acquisition in a single hemisphere: semantic organization. In D. Caplan (ed.), Biological Studies of Mental Processes. pp. 158–185. Cambridge, MA: MIT Press.
De Renzi, E. (1978). Hemispheric asymmetry as evidenced by spatial disorders. In M. Kinsbourne (ed.), Asymmetrical Function of the Brain. pp. 49–85. Cambridge: Cambridge University Press.
Dewson, J.H. (1977). Preliminary evidence of hemispheric asymmetry of auditory function in monkeys. In S. Harnad, R.W. Doty, L. Goldstein, J. Jaynes & G. Krauthamer (eds.), Lateralization in the Nervous System. pp. 63–74. New York: Academic Press.
Dimond, S.J. (1977). Evolution and lateralization of the brain: concluding remarks. Annals of the New York Academy of Sciences, 299, 477–501.
Dingwall, W.O. (1979). The evolution of human communication systems. In H. Whitaker & H.A. Whitaker (eds.), Studies in Neurolinguistics. Volume 4. pp. 1–95. New York: Academic Press.
Diringer, D. (1968). The Alphabet: A Key to the History of Mankind. London: Hutchinson.
Falk, D. (1980). Language, handedness and primitive brains. Did the australopithecines sign? American Anthropologist, 82, 72–78.
Feldman, H., Goldin-Meadow, S. & Gleitmann, L. (1978). Beyond Herodotus: the creation of language by linguistically deprived deaf children. In A. Lock (ed.), Action, Gesture and Symbol: The Emergence of Language. pp. 351–414. New York: Academic Press.
Gainotti, G., Caltagironi, C., Miceli, G. & Masullo, C. (1981). Selective semantic-lexical impairment of language comprehension in right brain damaged patients. Brain and Language, 13, 201–211.
Galaburda, A.M., Sanides, F. & Geschwind, N. (1978). Human brain: cytoarchitectonic left-right asymmetries in the temporal speech region. Archives of Neurology, 35, 812–817.
Gardner, B.T. & Gardner, R.A. (1971). Two-way communication with an infant chimpanzee. In A.M. Schrier & F. Stollnitz (eds.), Behavior of Nonhuman Primates. Volume 4. New York: Academic Press.
Garner, W.R. (1978). Aspects of a stimulus: features, dimensions and configurations. In E. Rosch & B.B. Lloyd (eds.), Cognition and Categorization. Hillsdale, NJ: Erlbaum.
Gates, A. & Bradshaw, J.L. (1977a). The role of the cerebral hemispheres in music. Brain and Language, 4, 403–431.
Gates, A. & Bradshaw, J.L. (1977b). Music perception and cerebral asymmetries. Cortex, 13, 390–401.
Geffen, G., Bradshaw, J.L. & Nettleton, N.C. (1973). Attention and hemispheric differences in reaction time during simultaneous audiovisual tasks. Quarterly Journal of Experimental Psychology, 25, 404–412.
Geffen, G., Bradshaw, J.L. & Wallace, G. (1971). Interhemispheric effects on reaction time to verbal and nonverbal visual stimuli. Journal of Experimental Psychology, 87, 415–422.
Geschwind, N. & Levitsky, W. (1968). Human brain: left-right asymmetries in temporal speech region. Science, 461, 186–187.
Goldberg, E. & Costa, L. (1981). Hemisphere differences in the acquisition of descriptive systems. Brain and Language, 14, 144–173.
Gould, S.J. & Eldredge, N. (1977). Punctuated equilibria: the tempo and mode of evolution reconsidered. Paleobiology, 3, 115–151.
Gur, R.C., Packer, I.K., Hungerbuhler, J.P., Reivich, M., Obrist, W.D., Amarnek, W.S. & Sackeim, H.A. (1980). Differences in the distribution of gray and white matter in human cerebral hemispheres. Science, 207, 1226–1228.
Haggard, M.P. (1971). Encoding and the REA for speech signals. Quarterly Journal of Experimental Psychology, 23, 34–45.
Halperin, Y., Nachshon, I. & Carmon, A. (1973). Shift of ear superiority in dichotic listening to temporally patterned nonverbal stimuli. Journal of the Acoustical Society of America, 53, 46–50.
Harris, L.J. (1980). Which hand is the ‘eye’ of the blind? A new look at an old question. In J. Herron (ed.), Neuropsychology of Left Handedness. pp. 303–329. New York: Academic Press.
Heilman, K.M. (1979). Neglect and related disorders. In K.M. Heilman & E. Valenstein (eds), Clinical Neuropsychology. pp. 286–307. Oxford: Oxford University Press.
Hewes, G.W. (1973). Primate communication and the gestural origin of language. Current Anthropology, 14, 5–24.
Hochberg, F.H. & Le May, M. (1975). Arteriographic correlates of handedness. Neurology, 25, 218–222.
Holloway, R.L. (1976). Paleoneurological evidence for language origins. Annals of the New York Academy of Sciences, 280, 330–348.
Jeffries, A.J. & Barrie, P.A. (1981). Sequence variation of nuclear DNA in man and the primates. Philosophical Transactions of the Royal Society of London B, 292, 133–147.
Jensen, H. (1970). Sign, Symbol and Script: An Account of Man’s Efforts to Write. London: Allen & Unwin.
Jerison, H. (1973). Evolution of the Brain and Intelligence. New York: Academic Press.
Jope, E.M. (1981). The emergence of man: information from protein systems. Philosophical Transactions of the Royal Society of London B, 292, 121–131.
Kellar, L.A. & Bever, T.G. (1980). Hemispheric asymmetries in the perception of musical intervals as a function of musical experience and family handedness background. Brain and Language, 10, 24–38.
Kertesz, A. & Geschwind, N. (1971). Patterns of pyramidal decussation and their relationships to handedness. Archives of Neurology, 24, 326–332.
Kimura, D. (1977). Acquisition of a motor skill after left hemisphere damage. Brain, 100, 527–542.
Kinsbourne, M. (1975). The mechanism of hemispheric control of the lateral gradient of attention. In P.M.A. Rabbitt & S. Dornic (eds), Attention and Performance, V, pp. 260–285. New York: Academic Press.
Klisz, D.K. (1980) Visual field differences between a fricative and a stop consonant. Cortex, 16, 169–173.
Kolakowski, D. & Malina, R.M. (1974). Spatial ability, throwing accuracy and man’s hunting heritage. Nature, 251, 410–412.
Lancaster, J. (1968). Primate communication systems and the emergence of human language. In P.C. Jay (ed.), Primates: Studies in Adaptation and Variability. pp. 439–457. New York: Holt, Rinehart & Winston.
Leakey, M.D. (1981). Tracks and tools. Philosophical Transactions of the Royal Society of London B, 292, 95–102.
Le Doux, J.E., Wilson, D.H. & Gazzaniga, M.S. (1977). Manipulo-spatial aspects of cerebral lateralization: clues to the origin of lateralization. Neuropsychologia, 15, 743–750.
Lehman, R.A.W. (1980). The handedness of rhesus monkeys, III: consistency within and across activities. Cortex, 16, 197–204.
Le May, M. (1976). Morphological cerebral asymmetries of modern man, fossil man, and nonhuman primates. Annals of the New York Academy of Sciences, 280, 349–366.
Le May, M. (1977). Asymmetries of the skull and handedness: phrenology revisited. Journal of the Neurological Sciences, 32, 243–253.
Le May, M. & Culebras, A. (1972). Human brain morphologic differences in the hemispheres demonstrable by carotid angiography. New England Journal of Medicine, 287, 168–170.
Le May, M. & Geschwind, N. (1975). Hemispheric differences in the brains of Great Apes. Brain Behavior and Evolution, 11, 48–52.
Lenneberg, E.H. (1967). Biological Foundations of Language. New York: Wiley.
Levy, J. (1969). Possible basis for the evolution of lateral specialization of the human brain. Nature, 224, 614–615.
Levy, J. (1977). The mammalian brain and the adaptive advantage of cerebral asymmetry. Annals of the New York Academy of Sciences, 229, 266–272.
Lieberman, P. (1979). Hominid evolution, supralaryngeal vocal tract physiology and the fossil evidence for reconstructions. Brain and Language, 7, 101–126.
Lowenstein, J.M. (1981). Immunological reactions from fossil material. Philosophical Transactions of the Royal Society of London B, 292, 143–149.
Mateer, C. & Kimura, D. (1977). Impairment of nonverbal oral movements in aphasia. Brain and Language, 4, 262–276.
McGlone, J. (1980). Sex differences in human brain asymmetry: a critical survey. Behavioral and Brain Sciences, 3, 215–263.
Meyer, L.B. (1956). Emotion and Meaning in Music. Chicago: University of Chicago Press.
Mills, L. & Rollman, G.B. (1980). Hemispheric asymmetry for auditory perception of temporal order. Neuropsychologia, 18, 41–47.
Molfese, D.L. & Molfese, V.J. (1979a). Hemisphere and stimulus differences as reflected in the cortical responses of newborn infants to speech stimuli. Developmental Psychology, 15, 505–511.
Molfese, D.L. & Molfese, V.J. (1979b). VOT distinctions in infants: learned or innate? In H. Whitaker & H.A. Whitaker (eds), Studies in Neurolinguistics, IV. New York: Academic Press.
Montagu, A. (1976). Toolmaking, hunting and the origin of language. Annals of the New York Academy of Sciences, 280, 266–274.
Moscovitch, M. (1979). Information processing and the cerebral hemispheres. In M.S. Gazzaniga (ed.), Handbook of Behavioral Neurobiology. Volume 2, pp. 379–446, Neuropsychology. New York: Academic Press.
Natale, M. (1977). Perception of nonlinguistic auditory rhythms by the speech hemisphere. Brain and Language, 4, 32–44.
Nebes, R.D. (1978). Direct examination of cognitive function in the right and left hemispheres. In M. Kinsbourne (ed.), Asymmetrical Function of the Brain. pp. 99–140. Cambridge: Cambridge University Press.
Neisser, U. (1967). Cognitive Psychology. New York: Appleton-Century Crofts.
Neville, A.C. (1976). Animal Asymmetry: Studies in Biology. London: Edward Arnold.
Nilsson, J., Glencross, D. & Geffen, G. (1980). The effects of familial sinstrality and preferred hand on dichaptic and dichotic tasks. Brain and Language, 10, 390–404.
Nottebohm, F. (1979). Origins and mechanisms in the establishment of cerebral dominance. In M.S. Gazzaniga (ed.), Handbook of Behavioral Neurobiology. Volume 2, Neuropsychology, pp. 295–344. New York: Plenum.
Oakley, K.P. (1972). Skill as a human possession. In S. Washburn & P. Dolhinow (eds), Perspectives on Human Evolution. New York: Holt, Rinehart & Winston.
Oakley, K.P. (1981). Emergence of higher thought 3.0–0.2 Ma B.P. Philosophical Transactions of the Royal Society of London B, 292, 205–211.
Ojemann, G.A. (1977). Asymmetric function of the thalamus in man. Annals of the New York Academy of Sciences, 299, 380–396.
O’Keefe, J. & Nadel, L. (1978). The Hippocampus as a Cognitive Map. Oxford: Oxford University Press.
Paivio, A. (1971). Imagery and Verbal Proccesses. New York: Holt, Rinehart & Winston.
Passingham, R.E. (1979). Specialization and the language areas. In H.D. Steklis & M.J. Raleigh (eds), Neurobiology of Social Communication in Primates. pp. 221–256. New York: Academic Press.
Passingham, R.E. (1981). Broca’s area and the origins of human vocal skill. Philosophical Transactions of the Royal Society of London B, 292, 167–175.
Patterson, K. & Bradshaw, J.L. (1975). Differential hemispheric mediation of nonverbal visual stimuli. Journal of Experimental Psychology, 1, 246–252.
Peterson, M.R., Beecher, M.D., Zoloth, S.R., Moody, D.B. & Stebbins, W.C., (1978). Neural lateralization of species-specific vocalizations by Japanese macaques(Macaca fuscata). Science, 202, 324–327.
Premack, D. (1976). Intelligence in Ape and Man. Hillsdale, NJ: Erlbaum.
Prince, J.H. (1980). Unusual Habits of Australian Animals. Sydney: Reed.
Rasmussen, T. & Milner, B. (1977). The role of early left-brain injury in determining lateralization of cerebral speech functions. Annals of the New York Academy of Sciences, 299, 355–369.
Robinson, G.M. & Solomon, D.J. (1974). Rhythm is processed by the speech hemisphere. Journal of Experimental Psychology, 102, 508–511.
Rogers, L.J. (1980). Lateralization in the avian brain. Bird Behaviour, 2, 1–12.
Rogers, L.J. (1981). Environmental influences on brain lateralization. Behavioral and Brain Sciences, 4, 35–36.
Ross, E.D. (1981). The aprosodias: functional-anatomic organization of the affective components of language in the right hemisphere. Archives of Neurology, 38, 561–569.
Rubens, A.B. (1977). Anatomical asymmetries of human cerebral cortex. In S. Harnad, R.W. Doty, L. Goldstein, J. Jaynes and G. Krauthamer (eds.), Lateralization in the Nervous System. pp. 503–516. New York: Academic Press.
Rumbaugh, D. (1977). Language Learning by a Chimpanzee: The Lana Project. New York: Academic Press.
Saffran, E.M., Bogyo, L.C., Schwartz, M.F. & Marin, O.S.M., (1980). Does deep dyslexia reflect right-hemisphere reading? In M. Coltheart, K. Patterson & J.C. Marshall (eds.), Deep Dyslexia. pp. 381–406. London: Routledge & Kegan Paul.
Sasanuma, S. (1980). Acquired dyslexia in Japanese: clinical features and underlying mechanisms. In M. Coltheart, K. Patterson & J.C. Marshall (eds.), Deep Dyslexia. pp. 48–90. London: Routledge & Kegan Paul.
Savage-Rumbaugh, E., Rumbaugh, D.M. & Boysen, S. (1980). Do apes use language? American Scientist, 68, 49–61.
Schwartz, J. & P. Tallal, (1980). Rate of acoustic change may underlie hemispheric specialization for speech perception. Science, 207, 1380–1381.
Searleman, A. (1977). A review of right hemisphere linguistic capabilities. Psychological Bulletin, 84, 503–528.
Simons, E.L. (1981). Man’s immediate forerunners. Philosophical Transactions of the Royal Society of London B, 292, 21–41.
Steklis, H.D. & Harnad, S.R. (1976). From hand to mouth: some critical stages in the evolution of language. Annals of the New York Academy of Sciences, 280, 445–455.
Steklis, H.D. & Raleigh, M.J. (1979a). Behavioural and neurobiological aspects of primate vocalization and facial expression. In H.D. Steklis & M.J. Raleigh (eds), Neurobiology of Social Communication in Primates, pp. 257–282. New York: Academic Press.
Steklis, H.D. & Raleigh, M.J. (1979b). Prerequisites for language: interspecific and evolutionary aspects. In H.D. Steklis and M.J. Raleigh (eds.), Neurobiology of Social Communication in Primates. pp. 283–314. New York: Academic Press.
Studdert-Kennedy, M. (1980a). The beginnings of speech. In G.B. Barlow, K. Immelman, M. Main & L. Petrinovich (eds.), Behavioral Development: The Bielefeld Interdisciplinary Project. New York: Cambridge University Press.
Studdert-Kennedy, M. (1980b). Cerebral hemispheres: specialized for the analysis of what? Behavioral and Brain Sciences, 4, 76–77.
Studdert-Kennedy, M. (1980c). Language by hand and by eye: a review of Edward S. Klima and Ursula Bellugis’ The Signs of Language. Cognition, 8, 93–108.
Studdert-Kennedy, M. (1980d). Speech perception. Language and Speech, 23, 45–66.
Sussman, H.M. & Westbury, J.R. (1978). A laterality effect in isometric and isotonic labial tracking. Journal of Speech and Hearing Research, 21, 563–579.
Swanson, J.M., Kinsbourne, M. & Horn, J.M. (1980). Cognitive deficit and left handedness: a cautionary note. In J. Herron (ed.), Neuropsychology of Left-Handedness. pp. 281–292. New York: Academic Press.
Tallal, P. (1981). Temporal processing as related to hemispheric specialization for speech perception in normal and language impaired populations. Behavioral and Brain Sciences, 4, 77–78.
Tallal, P., Stark, R.E., Kallman, C. & Mellits, D. (1980). Developmental dysphasia: relation between acoustic deficits and verbal processing. Neuropsychologia, 18, 273–284.
Terrace, H.S. (1980). Nim: A Chimpanzee Who Learned Sign Language. New York: Knopf.
Terrace, H.S., Petitto, L.A., Sanders, R.G. & Bever, T.G. (1979). Can an ape create a sentence? Science, 206, 891–902.
Tuttle, R.H. (1981). Evolution of hominid bipedalism and prehensile capabilities. Philosophical Transactions of the Royal Society of London B, 292, 89–94.
Vaid, J. & Genesee, F. (1980). Neuropsychological approaches to bilingualism. Canadian Journal of Psychology, 34, 417–445.
Van Lawick-Goodall, J. (1971). In the Shadow of Man. London: Collins.
Vines, G. (1981). Wolves in dogs’ clothing. New Scientist, 91 (No. 1270, September 10), 648–652.
Wada, J. & Rasmussen, T. (1960). Intracarotid injection of sodium amytal for the lateralization of cerebral speech dominance: experimental and clinical observations. Journal of Neurosurgery, 17, 266–282.
Wada, J.A., Clarke, R. & Hamm, A. (1975). Cerebral hemispheric asymmetry in humans. Archives of Neurology, 32, 239–246.
Walker, S.F. (1980). Lateralization of functions in the vertebrate brain: a review. British Journal of Psychology, 71, 329–367.
Wanner, E., Tyler, T.J. & Thompson, R.I. (1977). The psychobiology of speech and language: an overview. In J.E. Desmedt (ed.), Language and Hemispheric Specialization in Man: Cerebral Evoked Response Potentials. pp. 1–27. Basel: Karger.
Warren, J.M. (1977). Handedness and cerebral dominance in monkeys. In S. Harnad, R.W. Doty, L. Goldstein, J. Jaynes & G. Krauthamer (eds.), Lateralization in the Nervous System. pp. 151–172. New York: Academic Press.
Werner, H. (1948). Comparative Psychology of Mental Development. New York: International Universities Press.
Witelson, S.F. (1977a). Anatomic asymmetry in the temporal lobes: its documentation, phylogenesis, and its relationship to functional asymmetry. Annals of the New York Academy of Sciences, 299, 328–354.
Witelson, S.F. (1977b). Early hemisphere specialization and interhemispheric plasticity: an empirical and theoretical review. In S.J. Segalowitz & F.A. Gruber (eds.), Language Development and Neurological Theory. pp. 213–287. New York; Academic Press.
Witelson, S.F. & Pallie, W. (1973). Left hemisphere specialization for language in the newborn: neuroanatomical evidence of asymmetry. Brain, 96, 641–646.
Wolff, P.H. (1977). The development of manual asymmetries in motor sequencing skills. Annals of the New York Academy of Sciences, 299, 319–328.
Yeni-Komshian, G.H. & Benson, D.A. (1976). Anatomical study of cerebral asymmetry in the temporal lobe of humans, chimpanzees and rhesus monkeys. Science, 192, 387–389.
Young, J.Z. (1981). Some tentative conclusions. Philosophical Transactions of the Royal Society of London B, 292, 213–216.
Zaidel, E. (1978a). Concepts of cerebral dominance in the split brain. In P.A. Buser & A. Rougeul-Buser (eds.), Cerebral Correlates of Conscious Experience. pp. 263–284. Amsterdam: North Holland.
Zaidel, E. (1978b). Auditory language comprehension in the right hemisphere following cerebral commissurotomy and hemispherectomy. In A. Caramazza & E.B. Zurif (eds.), Language Acquisition and Language Breakdown: Parallels and Divergences. pp. 229–275. Baltimore, MD: Johns Hopkins University Press.
Zangwill, O.L. (1978). Aphasia and the concept of brain centres. In G.A. Miller & E. Lenneberg (eds.), Psychology and Biology of Language and Thought: Essays in Honor of Eric Lenneberg. pp. 118–149. New York: Academic Press.
Zurif, E.B. (1974). Auditory lateralization: prosodic and syntactic factors. Brain and Language, 1, 391–404.
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Bradshaw, J.L., Nettleton, N.C. Language lateralization to the dominant hemisphere: Tool use, gesture and language in hominid evolution. Current Psychological Reviews 2, 171–192 (1982). https://doi.org/10.1007/BF02684498
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