Abstract
Since the area was first described by Fritsch and Hitzig,1the function of the electrostimulable cortex of the cerebrum has been the subject of almost continuous controversy. The experiments were immediately called in question through criticisms of the technic by Dupuy,2Sanderson,3Carville and Duret,4and others, or by abstruse metaphysical deductions such as were advanced by Hermann5who objected to the motor area as violating the "unity of mind." The work of Ferrier,6Carville and Duret and Hitzig soon established the fact of the electrical excitability of limited areas of the cortex, but immediately a new question arose. Fritsch and Hitzig had considered the excitable zone as motor, if we may translate the expression, "entry of single psychic functions into material" by such a term. In this they were followed by Carville and Duret, who described the motor disturbances following lesions in the

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