Freiburger historische Bestände - digital

CHAPTER IV.

THE INTK APAR1ETAL SULCUS.

PAGE

I. General Statement, .. .. 194
II. Development of the Intraparietal

Sulcus,......197

III. The Intraparietal Sulcus in the Apes, 202

IV. Arrangement of the different Elements
of the intraparietal sulcus

in the Human Brain, . . .210
V. The Eamus Occipitalis of the Intra-

parietal Sulcus, . . . .218

VI. The Sulcus Occipitalis Transversus of

Ecker, . . . . . .220

VII. Deep Annectant Gyri in the Intra-

parietal Sulcus, . . . .234

VIII. The " Intraparietal Angle," . . 236
IX. Length of the Sagittal part of the

Intraparietal Sulcus, . . .241
X. Summary,......241

I. General Statement.—The intraparietal sulcus was first described and
named by Sir William Turner in a paper* upon the brain of the chimpanzee
which was submitted to the Royal Society of Edinburgh on the 19th of
February, 1866. In the following month he demonstrated its connexions
in the human brain in a lecturef which he delivered to the Royal Medical
Society in Edinburgh. In the same year, but somewhat later, the
fissure was also independently described by Dr. Adolf Pansch of Kiel,{
under the name of sulcus parietalis. Prior to the excellent descriptions
which are given by both of these anatomists the intraparietal sulcus had
been accurately figured, not only in the brain of the apes, but also in the
brain of man.

In the cerebrum of certain of the lower apes the intraparietal sulcus is
single, and uninterrupted throughout its whole course j in man, however,

* " Notes more especially on the Bridging Convolutions in the Brain of the Chimpanzee,"
Proc. Boy. Soc. Edinburgh, 19th February, 1866.

f The Convolutions of the human cerebrum topographically considered," Edinburgh Medical
Journal, June, 1866 ; also as a separate publication. Edinburgh, 1866.

I De sulcis et gyris in cerebris simiarum et hominum; Kiliae, 1866, vr., r., p. 9.