Freiburger historische Bestände - digital

Dr. Cunningham—Stir/ace Anatomy of the Primate Cerebrum. 137

border of the hemisphere is represented by a dotted line, which conveys
an altogether erroneous impression of its relations.

Fere* adopted a more satisfactory method (see Introductory Chapter),
and conducted his observations on the brain while still within the cranial
cavity. Further he pushed his inquiries into the intrauterine stages of
cerebral growth. Unfortunately, he also only gives absolute measurements
. The following is a short summary of his results :—

Distance of the Fissure of Sylvius above the Squamo-parietal Suture.

average,

(1.) Four seven-months' foetuses,
(2.) One foetus, months,

(3.) Twenty-three infants in the first month,

(4.) Seven infants of from one to two months,

(5.) Three boys, between 6 and 7 months,

(6.) Two children, 1 year old, .

(7.) One child, 3£ years,

(8.) One child, 4 years 9 months,

15 males, average,
8 females, ,,

6 mm.
10 mm.

18 mm.
16 mm.

19 mm.
18 mm.
16-5 mm.
16 mm.

6 mm.

There is a considerable difference between the results obtained by
Foulhouze and Fere\ This is, no doubt, due to the mode of procedure
adopted by the former observer. Fein's results may be regarded as the
more reliable. They are very nearly in accord with the measurements I
have made at corresponding periods of growth.

Merkel furnishes us with a good drawing of the cranio-cerebral relations
in a new-born child, but he falls into the same error as Foulhouze in
the delineation of the lower border of the cerebrum. The infero-lateral
border of the temporal lobe he depicts on the same level as the superciliary
border of the frontal lobe, and, consequently, he places the lower border of
the former lobe high above the z}^goma.

Symington, as we have seen, adopted a very satisfactory mode of procedure
(see Introductory Chapter). He examined the relations of the
Sylvian fissure in several foetuses, and in children up to the age of six
years. 11 In all of these the fissure was covered by the parietal bone, and
lay some distance above the anterior part of the squamous suture." In a
new-born child it was 10 mm. above the suture on the left side, and 12 mm,

ROYAL IRISH ACADEMY.-CUNNINGHAM MEMOIRS, NO. VII, [18]