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PART VI:
GW30
HORIZONT AL
PART VI:
GW30
HORIZONT AL
Figure 7. Lateral view of a GW30 brain with major structures in the cerebral hemispheres labeled. (From the
photographic series of: J. C. Larroche (1967) Maturation morphologique du système nerveux central: ses rap-
ports avec le développement pondéral du foetus et son age gestationnel. In: Regional Development of the Brain
in Early Life, A. Minkowski (ed.), London: Blackwell, page 248.)This specimen is case number W-187-65 (Perinatal RPSL) in the
Yakovlev Collection. A male infant survived 17 hours after a premature
birth. Death occurred because of a pulmonary hyaline membrane.
Autopsy notes include a subarachnoid hemorrhage over the cerebrum,
but the brain appears normal and is classified as a Normative Control
in the Yakovlev Collection (Haleem, 1990). It was cut in the horizontal
plane in 35-μm thick sections. Since there is no available photograph
of this brain before it was embedded and cut, we use the lateral view of
another GW30 brain that Larroche published in 1967 (Figure 7).
The approximate cutting plane of this brain is indicated in Figure 8
(facing page) with lines superimposed on the GW30 brain from the Lar-
roche (1967) series. The anterior part of each section is ventral to the
posterior part. As in all other specimens, the sections chosen for illustra-
tion are more closely spaced to show small structures in the diencepha-
lon, midbrain, pons, and medulla. Illustrated sections are spaced farther
apart when they contain only large brain structures, such as the cerebral
cortex, basal ganglia, and cerebellum. Photographs of 24 different Nissl-
stained sections (Levels 1-24) are shown at low magnification in Plates
112-131. The core of the brain and the cerebellum are shown at high
magnification in companion Plates 132AB-150AB for Levels 3-24.