FIFTH PART: APHASIA, AMUSIA AND AKALKULIA
Henschen relates that on Feb. 28, 1912, the date of his sixty-fifth birthday, he was obliged by statute of age limitation to retire as director of the medical clinic of Stockholm, and thereby from his usual clinical and laboratory activities. This outlook was not promising for original work in brain research, as future investigations depended on a review of personal, clinical and anatomic material and of the subject literature. However, undismayed and after different publications on disease of the heart (1913), the auditory center (1918), the center for smell, and the visual center (1917), Henschen reverted to the great aphasia problem which had interested him for over a period of thirty years.The problem of speech depends on a correct grasp of function, form and organization of brain sense areas and their centripetal and centrifugal connections, and especially of the centers of sight and