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Text-Fig. 11. Transverse section through the posterior thalamic region of a human embryo (6 cm.)

Showing the relation of the cerebral membranes to the great cerebral vein and neural tube at the junction of the lateral plate with the dorsal lamina, and the extreme thinness of the membrane (lower part of interhemispheric septum) which joins the sheath of the great cerebral vein to the lower margin of the falx cerebri.

The thin lower part of the interhemispheric septum disappears (text-fig. 11, S.), while the upper and thicker part persists as the definitive falx cerebri, the inferior sagittal sinus (text-fig. 11, I .S.S.) being developed in its lower border. The septum in the earlier stages of development is much thicker than at the stage described and is formed by a median condensation of the loose mesenchyme which occupies the space between the developing hemispheres. It is not formed by the union of the two layers of a fold, and the same remark applies to the formation of the tentorium and falx cerebelli.

Figure Abbreviations  
A.B.D. Anterior bilobed diverticulum.

Ant.D. Anterior diverticulum.

A.L. Anterior lobe.

Aq.C. Aqueductus cerebri.

B. V. Blood vessel.

C'. Constriction between “pineal sac” and “pineal eye”.

Ca. Capsule.

Cap. Capillary.

Cav. Cavity.

Cbl. Cerebellum.

C.C. Corpus callosum.

C'.E., C.Ep. Columuar epithelium.

C.H. Cerebral hemisphere.

Ch.P. Chorioid plexus.

C'h.P.V. III Chorioid plexus of third ventricle.

C'h.P.L. V. Chorioid plexus of lateral ventricle.

C.M. Corpus mammillaris.

C.N. III Cranial nerve III.

C.N. IV Cranial nerve IV.

0.N. V Cranial nerve V.

Cp. Capillary.

C.T. Connective tissue.

C.T.C’. Connective tissue cells.

Cr.C'. Cranial capsule.

Cyst. Cyst containing chorioidal villi.

C. V. Chorioidal villi.

D.D., D.D.’, D.D.” Dorsal diverticulum and its subdivisions.

D.S. Dorsal sac.

D.M. Dura mater.

E.L.M. External limiting membrane.

End.S. Endothelial space.

Ep. Ependyma.

Ep.D. Ependymal diverticulum (dorsal sac).

Epd. Epidermis.

Ep.Z. Ependymal zone.

Ep.C. Epithelial column.

Iv'.(.'. Vessels in fibrous capsule.

F .F’. F ornix.

G.C. V. Great cerebral vein (Galen).

G'li., G.S'l2. Glial sheath.

Gl.St. Glial stratum (pseudo-epithelium).

H.G. Habenular ganglion.

I.S.S. Inferior sagittal sinus.

I.L.S. Interlobar septum.

I.Lr.S. Interlobular septum.

Inf. Infundibulum.

I.P.R. Infrapineal recess.

L. Lobule.

Le. Lens.

L.N.F.I’.S. Layer of nerve fibres of pineal sac.

L.N.F.R. Layer of nerve fibres of retina.

Lmn. Lumen.

M.B. Meynert’s bundle.

M.Z. Marginal zone.

N.Z. Nuclear zone.

0p.P.St. Opening of pineal stalk.

0.T. Optic thalamus.

P. Pulvinar.

Pa. ? Paraphysis.

'Pa.C. Parenchyma cell.

Pa.0. Parietal organ (pineal eye).

Par. Parenchyma.

P.B. Pineal Body.

P.O. Pineal cells.

P.Co., P.C'., P.0.1, P.C.3 Posterior commissure.

P.Cyst. Pineal cyst.

P.D. Pineal diverticulum.

P.E. Pineal eye (parietal organ).

P.I.P. Posterior-intercalary plate.

P.L. Posterior lobe.

P.M., P.M.1, P.M.’ Pia mater.

P.M.D. Posterior median diverticulum. P.0. Pineal organ.

Post.D. Posterior diverticulum.

P.P.0. Peduncle of pineal organ.

P.R. Pineal recess.

Pr. Ep. Epithelial process.

P.S. Pineal sac.

P.Sh. Pial sheath.

P.St. Pineal stalk.

P. V. Pons Varolii.

P. V.A . Post-velar arch.

Pv.Sp. Perivascular space.

Q.P. Quadrigeminal plate.

R. Retina.

Ros. “ Rosettes ” .

R.P. Rathke’s pouch.

S. Septum interhemisphericum.

S.C’. Superior commissure (habenular commissure).

S.C'.0. Subcommissural organ.

S.Co. Sinus confluens.

S.0ol. Superior colliculus.

S.D. Secondary diverticulum.

S.E. condaly evagination.

S.D.N. Small darkly stained nucleus. Sp. Space.

S.P.L. Splenium.

S.T. Sinus transversus.

SLO. Stieda’s organ (terminal vesicle).

Sub.ep. Subependymal layer.

T. Tongue.

T.Cbl. Tentorium cerebelli.

Th. Thalamus.

Tag. Tegmentum.

Thr. Thrombus.

V.O'.M. Great cerebral vein (V.M. Galeni).

V.C.T. Vascular connective tissue.

V.F. Velar fold. V.M. Ventriculus mesencephalicus.

V.L. Ventriculus lateralis.

V. III Third ventricle.

V. IV Fourth ventricle.

V.S. Venous sinuses.

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Links: fig 1 | fig 2 | fig 3 | fig 4 | fig 5 | fig 6 | fig 7 | fig 8 | fig 9 | fig 10 | fig 18 | plate 1 | plate 2 | plate 3 | plate 4 | plate 5 | plate 6 | 1937 Gladstone Wakeley | Endocrine - Pineal Development | Category:Pineal


Gladstone RJ. and Wakeley CPG. Development and histogenesis of the human pineal organ. (1937) J. Anat., 19(4): 431-454.

Cite this page: Hill, M.A. (2024, April 16) Embryology GladstoneWakeley1937 fig11.jpg. Retrieved from

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current11:27, 4 January 2017Thumbnail for version as of 11:27, 4 January 20171,438 × 1,599 (611 KB)Z8600021 (talk | contribs)==Text-Fig. 11. At a later stage of development when the corpus callosum and fornix grow backward over the thalamencephalon and mid-brain== The thin lower part of the interhemispheric septum disappears (text-fig. 11, S.), while the upper and thicker...