Multiple nonprimary motor areas in the human cortex

Journal of Neurophysiology

Volumn 77, Issue 4, 1997, Pages 2164-2174

  Fink, Gereon R ^a,b   Frackowiak, Richard S J ^a,b   Pietrzyk, Uwe ^c   Passingham, Richard E ^a,b,d  

^a UNIVERSITY COLLEGE LONDON   (United Kingdom)

^b MRC CLINICAL SCIENCES CENTRE   (United Kingdom)

^c MAX PLANCK INSTITUTE FOR NEUROLOGICAL RESEARCH   (Germany)

^d UNIVERSITY OF OXFORD   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

ADULT; ARTICLE; BRAIN BLOOD FLOW; BRAIN MAPPING; DATA ANALYSIS; HUMAN; MALE; MOTOR CORTEX; NORMAL HUMAN; POSITRON EMISSION TOMOGRAPHY; PRIORITY JOURNAL; SOMATOSENSORY CORTEX;

EID: 0030906504     PISSN: 00223077     EISSN: None     Source Type: Journal    
DOI: 10.1152/jn.1997.77.4.2164     Document Type: Article

References (95)

1. ANDERSON, T. J., JENKINS, I. H., BROOKS, D. J., HAWKEN, M. B., FRACKOWIAK, R.S.J., AND KENNARD, C. Cortical control of saccades and fixation in man: a PET study. Brain 117: 1073-1084, 1994.
2. BOECKER, H., KLEINSCHMIDT, A., REQUARDT, M., HAENICKE, W., MERBOLDT, K. D., AND FRAHM, J. Functional cooperativity of human cortical motor areas during self-paced simple finger movements. A high-resolution MRI study. Brain 117: 1231-1239, 1994.
3. BRUCE, C. J., GOLDBERG, M. E., BUSHNELL, M. C., AND STANTON, G. B. Primate frontal eye fields. II. Physiological and anatomical correlates of electrically evoked eye movements. J. Neurophysiol. 54: 714-734, 1985.
4. CHOLLET, F., DI PIERO, V. D., WISE, R.J.S., BROOKS, D. J., DOLAN, R. J., AND FRACKOWIAK, R.S.J. The functional anatomy of motor recovery after stroke in humans: a study with positron emission tomography. Ann. Neurol. 29: 63-71, 1991.
5. COLEBATCH, J. G., DEIBER, M.-P., PASSINGHAM, R. E., FRISTON, K. J., AND FRACKOWIAK, R.S.J. Regional cerebral blood flow during voluntary arm and hand movements in human subjects. J. Neurophysiol. 65: 1392-1401, 1991.
6. DEIBER, M.-P., IBANEZ, V., SADATO, N., AND HALLET, M. Cerebral structures participating in motor preparation in humans: a study with positron emission tomography. J. Neurophysiol. 75: 233-247, 1996.
7. DEIBER, M.-P., PASSINGHAM, R. E., COLEBATCH, J. G., FRISTON, K. J., NIXON, P. D., AND FRACKOWIAK, R.S.J. Cortical areas and the selection of movement: a study with positron emission tomography. Exp. Brain Res. 84: 393-402, 1991.
8. DETTMERS, C., FINK, G. R., LEMON, R. N., STEPHAN, K. M., PASSINGHAM, R. E., SILBERSWEIG, D., HOLMES, A., BROOKS, D. J., AND FRACKOWIAK, R.S.J. The relation between cerebral activity and force in the motor areas of the human brain. J. Neurophysiol. 74: 802-815, 1995.
9. DI PELLEGRINO, G. AND WISE, S. P. Visuospatial versus visuomotor activity in the premotor and prefrontal cortex of a primate. J. Neurosci. 13: 1227-1243, 1993a.
10. DI PELLEGRINO, G. AND WISE, S. P. Effects of attention on visuomotor activity in the premotor and prefrontal cortex of a primate. Somatosens. Mot. Res. 10: 245-262, 1993b.
11. DUM, R. P. AND STRICK, P. L. The origin of corticospinal projections from the premotor areas in the frontal lobe. J. Neurosci. 11: 667-689, 1991.
12. DUM, R. P. AND STRICK, P. L. Cingulate motor areas. In: Cingulate Cortex and Limbic Thalamus: A Comprehensive Handbook, edited by B. A. Vogt and M. Graybiel. Boston: Birkhauser, 1993, p. 415-441.
13. FOERSTER, O. Motorische Felder und Bahnen. Berlin: Springer, 1936.
14. FOX, P. T., Fox, J. M., RAICHLE, M. E., AND BURDE, R. M. The role of cerebral cortex in the generation of voluntary saccades: a positron emission tomography study. J. Neurophysiol. 54: 348-369, 1985.
15. FOX, P. T., MIEZIN, F. M., ALLMAN, J. M., VAN ESSEN, D. C., AND RAICHLE, M. E. Retinotopic organization of human visual cortex mapped with positron emission tomography. J. Neurosci. 7: 913-922, 1987.
16. FRIED, I. Electrical stimulation of the supplementary sensorimotor area. In: Supplementary Sensorimotor Area, edited by H. O. Lueders. Philadelphia: Lippincott-Raven, 1996, p. 177-186.
17. FRIED, I., KATZ, A., MCCARTHY, G., SASS, K. J., WILLIAMSON, P., AND SPENCER, S. S. Functional organization of human supplementary motor cortex studied by electrical stimulation. J. Neurosci. 11: 3656-3666, 1991.
18. FRISTON, K. J., FRITH, C. D., LIDDLE, P. F., DOLAN, R. J., LAMMERTSMA, A. A., AND FRACKOWIAK, R.S.J. The relationship between global and local changes in PET scans. J. Cereb. Blood Flow Metab. 10: 458-466, 1990.
19. FRISTON, K. J., FRITH, C. D., LIDDLE, P. F., AND FRACKOWIAK, R.S.J. Comparing functional (PET) images: the assessment of significant change. J. Cereb. Blood Flow Metab. 11: 690-699, 1991.
20. FRITH, C. D. AND GRASBY, P. M. rCBF studies of prefrontal function and their relevance to psychosis. In: Handbook of Neuropsychology, edited by F. Boller and J. Grafman. Elsevier Science B.V., 1995, p. 383-403.
21. GALEA, M. P. AND DARIAN-SMITH, I. Multiple corticospinal neuron populations in the macaque monkey specified by their unique cortical origins, spinal terminations and connections. Cereb. Cortex 4: 167-194, 1995.
22. GENTILUCCI, M., FOGASSI, L., LUPPINO, G., MATELLI, M., CAMARDA, R., AND RIZZOLATTI, G. Functional organization of inferior area 6 in the macaque monkey. I. Somatotopy and the control of proximal movements. Exp. Brain Res. 71: 475-490, 1988.
23. GEYER, S., LEDBERG, A., SCHLEICHER, A., KINOMURA, S., SCHORMANN, T., BUERGEL, U., KLINGBERG, T., LARSON, J., ZILLES, K., AND ROLAND, P. E. Two different areas within the primary motor cortex of man. Nature Lond. 382: 805-807, 1996.
24. GODSCHALK, M., MITZ, A. R., VAN DER BURG, J., AND VAN DUIN, B. Micro-stimulation map of the monkey premotor cortex. Soc. Neurosci. Abstr. 16: 1113, 1990.
25. GRAFTON, S. T., FAGG, A. H., WOODS, R. P., AND ARBIB, M. A. Functional anatomy of pointing and grasping in humans. Cereb. Cortex 6: 226-237, 1996.
26. GRAFTON, S. T., MAZZIOTTA, J. C., WOODS, R. P., AND PHELPS, M. E. Human functional anatomy of visually guided finger movements. Brain 115: 565-587, 1992.
27. GRAFTON, S. T., WOODS, R. P., AND MAZZIOTTA, J. C. Within-arm somatotopy in human motor areas determined by positron emission tomography imaging of cerebral blood flow. Exp. Brain Res. 95: 172-176, 1993.
28. GRAFTON, S. T., WOODS, R. P., MAZZIOTTA, J. C., AND PHELPS, M. E. Somatotopic mapping of the primary motor cortex in humans: activation studies with cerebral blood flow and positron emission tomography. J. Neurophysiol. 66: 735-743, 1991.
29. GRAFTON, S. T., WOODS, R. P., AND TYSZKA, J. M. Functional imaging of procedural motor learing: relating cerebral blood flow with individual subject performance. Human Brain Mapping 1: 221-234, 1994.
30. HE, S.-Q., DUM, R. P., AND STRICK, P. L. Topographic organization of corticospinal projections from the frontal lobe: motor areas on the lateral surface of the hemisphere. J. Neurosci. 13: 952-980, 1993.
31. HE, S.-Q., DUM, R. P., AND STRICK, P. L. Topographic organization of corticospinal projections from the frontal lobe: motor areas on the medial surface of the hemisphere. J. Neurosci. 15: 3284-3306, 1995.
32. JACKSON, J. H. Clinical and physiological researches on the nervous system. I. On the anatomical and physiological localization of movements in the brain. In: Selected Writings, edited by J. H. Jackson. London: Churchill, 1875, p. 33-76.
33. KAWASHIMA, R., ROLAND, P. E., AND O'SULLIVAN, B. T. Functional anatomy of reaching and visuomotor learning : a positron emission tomography study. Cereb. Cortex 2: 111-122, 1995.
34. KIM, S.-G., ASHE, J., GEORGOPOULOS, A. P., MERKLE, H., ELLERMANN, J. M., MENON, R. S., OGAWA, S., AND UGURBIL, K. Functional imaging of human motor cortex at high magnetic field. J. Neurophysiol. 69: 297-302, 1993a.
35. KIM, S. G., ASHE, J., HENDRICH, K., ELLERMANN, J. M., MERKLE, H., UGURBIL, K., AND GEORGOPOULOS, A. P. Functional magnetic resonance imaging of motor cortex: hemispheric asymmetry and handedness. Science Wash. DC 261: 615-617, 1993b.
36. KRAMS, M., RUSHWORTH, M., DEIBER, M.-P., FRACKOWIAK, R.S.J., AND PASSINGHAM, R. E. Broca's area and mental preparation of finger movements. Exp. Brain Res. (In press).
37. KURATA, K. Distribution of neurons with set- and movement-related activity before hand and foot movements in the premotor cortex of rhesus monkeys. Exp. Brain Res. 77: 245-256, 1989.
38. KURATA, K. Information processing for motor control in primate premotor cortex. Behav. Brain Res. 61: 135-142, 1994.
39. KURATA, K. AND HUFFMAN, D. S. Differential effects of muscimol microinjection into dorsal and ventral aspects of the premotor cortex of monkeys. J. Neurophysiol. 64: 1151-1164, 1994.
40. KUYPERS, H.G.J.M. Anatomy of descending pathways. In: Handbook of Physiology. The Nervous System. Motor Control. Bethesda, MD: Am. Physiol. Soc., 1981, sect. 1, vol. II, p. 597-666.
41. LEICHNETZ, G. R. Afferent and efferent connections of the dorsolateral precentral gyrus (area 4, hand/arm region) in the macaque monkey, with comparisons to area 8. J. Comp. Neurol. 254: 460-492, 1986.
42. LUPPINO, G., MATELLI, M., CAMARDA, R. M., GALLESE, V., AND RIZZOLATTI, G. Multiple representations of body movements in mesial area 6 and the adjacent cingulate cortex: an intracortical micro stimulation study in the macaque monkey. J. Comp. Neurol. 311: 463-482, 1991.
43. LUPPINO, G., MATELLI, M., CAMARDA, R., AND RIZZOLATTI, G. Corticospinal projections from mesial frontal and cingulate areas in the monkey. Neuroreport 5: 2545-2548, 1994.
44. MACPHERSON, J. M., MARANGOZ, C., MILES, T. S., AND WIESENDANGER, M. Microstimulation of the supplementary motor area (SMA) in the awake monkey. Exp. Brain Res. 45: 410-416, 1982.
45. MATELLI, M., LUPPINO, G., AND RIZZOLATTI, G. Pattern of cytochrome oxidase activity in frontal agranular cortex of the macaque monkey. Behav. Brain Res. 18: 125-136, 1985.
46. MATELLI, M., LUPPINO, G., AND RIZZOLATTI, G. Architecture of superior and mesial area 6 and the adjacent cingulate cortex in the macaque monkey. J. Comp. Neurol. 311: 445-462, 1991.
47. MATELLI, M., RIZZOLATTI, G., BETTINARDI, V., GILARDI, M. C., PERANI, D., RIZZO, G., AND FAZIO, F. Activation of precentral and mesial motor areas during the execution of elementary proximal and distal arm movements: a PET study. Neuroreport 4: 1295-1298, 1993.
48. MAZZIOTTA, J. C., HUANG, S. C., PHELPS, M. E., CARSON, R. E., MACDONALD, N. S., AND MAHONEY, K. A non-invasive positron computed tomography technique using oxygen-15 labelled water for the evaluation of a neurobehavioral task battery. J. Cereb. Blood Flow Metab. 5: 70-78, 1985.
49. MITZ, A. R. AND WISE, S. P. The somatotopic organization of the supplementary motor area: intracortical microstimulation mapping. J. Neurosci. 7: 1010-1021, 1987.
50. MUAKASSA, K. F. AND STRICK, P. L. Frontal lobe inputs to primate motor cortex: evidence for four somatotopically organized "premotor areas." Brain Res. 177: 176-182, 1979.
51. MURRAY, E. A. AND COULTER, J. D. Supplementary sensory areas: the medial parietal cortex in the monkey. In: Cortical Sensory Organization: Multiple Somatic Areas, edited by C. N. Woolsey. Clifton, NJ: Humana Press, 1981, p. 167-195.
52. PASSINGHAM, R. E. Functional specialization of the supplementary motor area in monkeys and humans. In: Supplementary Sensorimotor Area, edited by H. O. Luders. Philadelphia: Lippincott Raven, 1996, p. 105-116.
53. PAUS, T. Location and function of the human frontal eye field: a selective review. Neuropsychologia 34: 475-483, 1996.
54. PAUS, T., PETRIDES, M., EVANS, A. C., AND MEYER, E. Role of the human anterior cingulate cortex in the control of oculomotor, manual, and speech responses: a positron emission tomography study. J. Neurophysiol. 70: 453-459, 1993.
55. PAUS, T., TOMAIUOLO, F., OTAKY, N., MACDONALD, D., PETRIDES, M., ATLAS, J., MORRIS, R., AND EVANS, A. C. Human cingulate and paracingulate sulci: pattern, variability, asymmetry and probabilistic map. Cereb. Cortex 6: 207-214, 1996.
56. PEARSON, R.C.A. AND POWELL, T.P.S. The projection of the primary sensory cortex upon area 5 in the monkey. Brain Res. 9: 89-103, 1985.
57. PENFIELD, W. AND BOLDREY, E. Somatic motor and sensory representation in the cerebral cortex of man as studied by electrical stimulation. Brain 15: 389-443, 1938.
58. PETRIDES, M. AND PANDYA, D. N. Comparative architectonic analysis of the human and macaque frontal cortex. In: Handbook of Neuropsychology, edited by J. Grafman and F. Boller. Amsterdam: Elsevier, 1995.
59. PICARD, N. AND STRICK, P. L. Motor areas of the medial wall: a review of their location and functional activation. Cerebral Cortex 6: 342-353, 1996.
60. PIETRZYK, U., HERHOLZ, K., FINK, G. R., JACOBS, A., MIELKE, R., SLANSKY, I., WUERKER, M., AND HEISS, W.-D. Validation of a multi-purpose three-dimensional image registration technique. J. Nuclear Med. 35: 2011-2018, 1994.
61. PLAYFORD, E. D., JENKINS, I. H., PASSINGHAM, R. E., NUTT, J., FRACKOWIAK, R.S.J., AND BROOKS, D. J. Impaired mesial frontal and putamen activation in Parkinson's disease: a PET study. Ann. Neurol. 32: 151-161, 1992.
62. RAO, S. M., BINDER, R. J., BANDETTINI, P. A., HAMMEKE, T. A., YETKIN, F. Z., JESMANOWICZ, A., LISK, L. M., MORRIS, G. L., MUELLER, W. M., ESTKOWSKI, L. D., WONG, E. C., HAUGHTON, V. M., AND HYDE, J. S. Functional magnetic resonance imaging of complex human movements. Neurology 43: 2311-2318, 1993.
63. RAO, S. M., BINDER, J. R., HAMMEKE, T. A., BANDETTINI, P. A., BOBHOLZ, J. A., FROST, J. A., MYKLEBUST, B. M., JACOBSON, R. D., AND HYDE, J. S. Somatotopic mapping of the human primary motor cortex with functional magnetic resonance imaging. Neurology 45: 919-924, 1995.
64. REMY, P., ZILBOVICIUS, M., LEROY-WILLIG, A., SYROTA, A., AND SAMSON, Y. Movement- and Task-related activations of motor cortical areas: a positron emission tomographic study. Ann. Neurol. 36: 19-26, 1994.
65. RIZZOLATTI, G., CAMARDA, R., FOGASSI, L., GENTILUCCI, M., LUPPINO, G., AND MATELLI, M. Functional organization of inferior area 6 in the macaque monkey. II. Area F5 and the control of distal movements. Exp. Brain Res. 71: 491-507, 1988.
66. RIZZOLATTI, G., FADIGA, L., GALLESE, V., AND FOGASSI, L. Premotor cortex and the recognition of motor actions. Cognit. Brain Res. 3: 131-142, 1996.
67. RIZZOLATTI, G., GENTILUCCI, M., FOGASSI, L., LUPPINO, G., MATELLI, M., AND PONZONI-MAGGI, S. Neurons related to goal-directed motor acts in inferior area 6 of the macaque monkey. Exp. Brain Res. 67: 220-224, 1987.
68. ROLAND, P. E., GULYAS, B., AND SEITZ, R. J. Structures in the human brain participating in visual learning, tactile learning and motor learning. In: Memory: Organization and Locus of Change, edited by L. R. Squire, N. M. Weinberger, G. Lynch, and J. L. McGaugh. Oxford: Oxford University Press, 1991, p. 95-113.
69. ROLAND, P. E. AND ZILLES, K. Brain atlases - a new research tool. Trends Neurosci. 17: 458-467, 1994.
70. RUMEAU, C., TZOURIO, N., MURAYAMA, N., PERETTI-VITON, P., LEVRIER, O., JOLIOT, M., MAZOYER, B., AND SALAMON, G. Location of hand function in the sensorimotor cortex: MR and functional correlation. Am. J. Neuroradiol. 15: 567-572, 1994.
71. SANES, J. N., DONOGHUE, J. P., THANGARAJ, V., EDELMAN, R. R., AND WARACH, S. Shared neural substrates controlling hand movements in human motor cortex. Science Wash. DC 268: 1775-1777, 1995.
72. SCHLAUG, G., KNORR, U., AND SEITZ, R. J. Inter-subject variability of cerebral activations in acquiring a motor skill: a study with positron emission tomography. Exp. Brain Res. 98: 523-534, 1994.
73. SERENO, M. I., DALE, A. M., REPPAS, J. B., KWONG, K. K., BELLIVEAU, J. W., BRADY, T. J., ROSEN, B. R., AND TOOTELL, R.B.H. Borders of multiple visual areasin humans revealed by functional magnetic resonance imaging. Science Wash. DC 268: 889-893, 1995.
74. SHIPP, S., WATSON, J.D.G., FRACKOWIAK, R.S.J., AND ZEKI, S. Retinotopic maps in human prestriate visual cortex: the demarcation of areas V2 and V3. Neuroimage 2: 125-132, 1995.
75. 15O regional cerebral blood flow three-dimensional imaging technique. J. Cereb. Blood Flow Metab. 13: 617-629, 1993.
76. SPINKS, T. J., JONES, T., BAILEY, D. L., TOWNSEND, D. W., GROOTONK, S., AND BLOOMFIELD, P. M. Physical performance of a positron tomograph for brain imaging with retractable septa. Phys. Med. Biol. 8: 1637-1655, 1992.
77. STEINMETZ, H., FUERST, G., AND FREUND, H. J. Cerebral cortical localization: application and validation of the proportional grid system in MR imaging. J. Comp. Assist. Tomogr. 13: 10-19, 1989.
78. STEPHAN, K. M., FINK, G. R., PASSINGHAM, R. E., SILBERSWEIG, D., CEBALLOS-BAUMANN, A. O., FRITH, C. D., AND FRACKOWIAK, R.S.J. Imagining the execution of movements. J. Neurophysiol. 73: 373-386, 1995.
79. TALAIRACH, J. AND TOURNOUX, P. Coplanar Stereotaxic Atlas Of The Human Brain. Stuttgart: Thieme, 1988.
80. TOWNSEND, D. W., GEISSBULLER, A., DEFRISE, M., HOFFMAN, E. J., SPINKS, T. J., BAILEY, D. L., GILARDI, M.-C., AND JONES, T. Fully three-dimensional reconstruction for a PET camera with retractable septa. IEEE Trans. Med. Imaging 10: 505-512, 1991.
81. TOYOSHIMA, M. AND SAKAI, H. Exact cortical extent of the origins of the corticospinal tract (CST) and the quantitative contribution of the CST in different cytoarchitectonic areas. A study with horseradish peroxidase in the monkey. J. Hirnforsch. 23: 257-269, 1981.
82. VAN ESSEN, D. C., FELLEMAN, D. J., DEYOE, E. A., AND KNIERIM, J. J. Probing the primate visual cortex: pathways and perspectives. In: Functional Organization of the Human Visual Cortex, edited by B. Gulyas, D. Ottoson, and P. E. Roland. Oxford: Pergamon, 1993, p. 29-42.
83. VOGT, B. A., NIMCHINSKY, E. A., VOGT, L. J., AND HOF, P. R. Human cingulate cortex: surface features, flat maps, and cytoarchitecture. J. Comp. Neurol. 359: 490-506, 1995.
84. WATSON, J.D.G., MYERS, R., FRACKOWIAK, R.S.J., HAJNAL, J. V., WOODS, R. P., MAZZIOTTA, J. C., SHIPP, S., AND ZEKI, S. Area V5 of the human brain: evidence from a combined study using positron emission tomography and magnetic resonance imaging. Cereb. Cortex 3: 79-94, 1993.
85. WEILLER, C., CHOLLET, F., FRISTON, K. J., WISE, R.J.S., AND FRACKOWIAK, R.S.J. Functional reorganization of the brain in recovery from striatocapsular infarction in man. Ann. Neurol. 31: 463-472, 1992.
86. WIESENDANGER, M., ROUILLER, E. M., KAZENNIKOV, O., AND PERRIG, S. Is the supplementary motor area a bilaterally organized system? In: Supplementary Sensorimotor Area, edited by H. O. Lueders. Philadelphia: Lippincott-Raven, 1996, p. 85-94.
87. WISE, S. P. Corticospinal efferents of the supplementary sensorimotor area in relation to the primary motor area. In: Supplementary Sensorimotor Area, edited by H. O. Lueders. Philadephia: Lippincott-Raven, 1996, p. 71-84.
88. WISE, S. P., DI PELLEGRINO, G., AND BOUSSAOUD, D. The premotor cortex and nonstandard sensorimotor mapping. Can. J. Physiol. Pharmacol. (In press).
89. WOODS, R. P., CHERRY, S. R., AND MAZZIOTTA, J. C. A rapid automated algorithm for accurately aligning and reslicing positron emission tomography images. J. Comp. Assist. Tomogr. 16: 620-633, 1992.
90. WOODS, R. P., MAZZIOTTA, J. C., AND CHERRY, S. R. MRI-PET registration with automated algorithm. J. Comp. Assist. Tomogr. 17: 536-546, 1993.
91. WOOLSEY, C. N., SETTLAGE, P. H., MEYER, D. R., SPENCER, W., PINTO-HAMUY, T., AND TRAVIS, M. Pattern of localization in precentral and "supplementary" motor area and their relation to the concept of a premotor cortex. Assoc. Res. Nerv. Ment. Dis. 30: 238-264, 1952.
92. ZEKI, S. A Vision Of The Brain. Oxford: Blackwell Scientific Publication, 1993.
93. ZEKI, S., WATSON, J.D.G., LUECK, C. J., FRISTON, K. J., KENNARD, C., AND FRACKOWIAK, R.S.J. A direct demonstration of functional specialization in human visual cortex. J. Neurosci. 11: 641-649, 1991.
94. ZILLES, K., SCHLAUG, G., GEYER, S., LUPPINO, G., MATELLI, M., QUE, M., SCHLEICHER, A., AND SCHORMANN, T. Anatomy and transmitter receptors of the supplementary motor area in the human and non-human primate brain. In: Supplementary Sensorimotor Area, edited by H. O. Lueders. Philadelphia: Lippincott-Raven, 1996a, p. 29-44.
95. ZILLES, K., SCHLAUG, G., MATELLI, M., LUPPINO, G., SCHLEICHER, A., QU, M., DABRINGHAUS, A., SEITZ, R., AND ROLAND, P. E. Mapping of human and macaque sensorimotor areas by integrating architectonic, transmitter receptor, MRI and PET data. J. Anat. 187: 515-537, 1996b.