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The left cerebral hemisphere, from a fetus in the early part of the seventh month of development. Labels: p.c.s., sulcus praecentralis superior; p.c.i., sulcus praecentralis inferior; r1, lower part of Rolandic fissure; r2, upper part of Rolandic fissure; p1, inferior postcentral sulcus; p3, ramus horizontalis; p4, ramus occipitalis; e.p., external perpendicular fissure; t1, parallel sulcus; S, Sylian fossa; F.P., fronto-parietal wall; F.,frontal wall, O., orbital wall.

Brain of Fetus

The left cerebral hemisphere, from a fetus in the early part of the seventh month of development. Labels:…

Showing the development of the cerebellum. A, Transverse section through the forepart of the cerebellum of a sheep embryo. B, Transverse section through the hinder part of the cerebellum of a sheep embryo. C, Cerebellum of a human fetus 17 cm long. D, Median section through cerebellum of sheep embryo 5 cm long.E, Median section through cerebellum of human fetus 17 cm long. Labels: 1, sulcus primarius; 2, sulcus above and afterwards behind the pyramid; 3, sulcus between pyramid and uvula; 4, great horizontal fissure; r.l., lateral recess ventricle IV; T, transverse groove in roof of ventricle IV.

Development of Cerebellum

Showing the development of the cerebellum. A, Transverse section through the forepart of the cerebellum…

Back view of the medulla, pons, and mesencephalon of a full term human fetus.

Back View of Medulla, Pons, and Mesencephalon

Back view of the medulla, pons, and mesencephalon of a full term human fetus.

Front view of the medulla, pons, and mesencephalon of a full term human fetus.

Front view of Medulla, Pons, and Mesencephalon

Front view of the medulla, pons, and mesencephalon of a full term human fetus.

Lateral view of the medulla, pons, and mesencephalon of a full term human fetus.

Lateral View of Medulla, Pons, and Mesencephalon

Lateral view of the medulla, pons, and mesencephalon of a full term human fetus.

Transverse section through the closed part of the fetal medulla immediately above the decussation of the pyramids.

Transverse Section Through Closed Part of Fetal Medulla

Transverse section through the closed part of the fetal medulla immediately above the decussation of…

Transverse section through the lower end of the medulla of a full term fetus.

Transverse Section Through the the Medulla

Transverse section through the lower end of the medulla of a full term fetus.