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THE THALAMUS OF ELEPHANTULIJS«

PART 11 - PLATES,

19 ybtf.

ABBREVIATIONS USED IN ALL FIGURES.

A .CO a - Anterior commissure.A.COLo - Anterior colliculus,AoHYPoA. - Anterior hypothalamic area*AMYG. - AmygdalaqANSA.L. - Ansa lenticularis.B.OLF., - Olfactory bulb,BR.CONJa- Brachium conjunctivum.G .CALL., - corpus callosum.CER.A^. - Cerebral aqueduct.CO .I.AD . - Interanterodorsal commissure.CO.HABa - Habenular commissure.CO. HIPPa - Hippocampal commissures DEC.G. - Decussation of Ganser*DEC.M. - Decussation of Meynerta.DEC .S aMAM a - Supramammi11qry decussation.D .L .B . - Dorsal longitudinal bundle aE .M .L . - External medullary lamina a FIMo - Fimbria hippocample FaLENTa - Fasciculus lenticularisa FOR, MONa - Foramen of Monro,FORNa - Fornix.HABa - Habenula*HIPb - Hippocanpus0 HYP a - Hypothalamus«HYPaRo- Hypophysial recess of third ventricle,HYP,ST, - Hypophysial stalk.I»CAPS, - Internal capsule,I.M ,L» - Internal medullary lamina,LSMN.M. - Medial lemniscus,L. GEN* - Lateral geniculate body,L, HYP.A. - Lateral hypothalamic area,L« PR .R . - Lateral preoptic region.MAMaB. - Mammillary body0 M.FOR.B. - Medial forebrain bundle.M» GEN, - Medial geniculate body,M« INI. - Mass a intermediao M .L .B . - Medial longitudinal bundle.M.PR.R. - Medial preoptic region.N .A .D ., - Anterodorsal nucleus,N.A.M . - Anteromedial nucleus,N .A .V . - Ante rove ntral nucleus.N. CENT. - Central nucleus,N. CENT. L. - Central lateral nucleus,N.C.Ma - Centrum medianum,N.D.M . - Dorsomedial nucleus,N» GEN.L.D. - Dorsal nucleus of the lateral geniculate body.

N.GEN.L.V, - Ventral nucleus of the lateral geniculate body.

N.GEN.M. - Medial geniculate nucleus.N.HAB, Lo - Lateral habenular nucleus.N.HAB.M. - Medial habenular nucleus,N .I .A .D . - Interanterodorsal nucleus,N .I .A .M . - Interanteromedial nucleus.N .I .M .D . - Intermediodorsal nucleus,N .I.PAF, - Interparafaacicular nucleus.N .I .V . - Interventral nucleus,N.L.-Lateral nucleus.N .L .P . Lateral posterior nucleus#N .L .O .T . - Large celled nucleus of the optic tract, N.M .D, - Medial dorsal nucleus,N, MAM.M. - Medial mammillary nucleus,N• MAMoL, - Lateral mammillary nucleus,NoMEoER * - Median preoptic n u c le u s„N.M .V. - Medial ventral nucleus,N .O .P . - Optic nerve.N, PAC. - Paracentral nucleus,N, PAF. - Parafa3cicular nucleus,N. PAT, - Parataenial nucleus,N.PAV# - Paraventricular nucleus,N.PAV.A. - Anterior Paraventricular nucleus,N.PAV.P. - Posterior paraventriciilar nucleus,N.P.CO. - Nucleus of the posterior commissure#N.PRET, - Pretectal nucleus,N. RET, - Reticular nucleus.N . RETJN. - Nucleus reuniens,N. RH. - Rhomboid nucleus,N.SCH. - Suprachiasmatic nucleus,N.S . GEN.- Suprageniculate nucleus,N. SOP, - Supraoptic nucleus.N, S.PAF. - Subparafasc icular nucleus.N.STR.TERM, - Nucleus of the stria terminalis.N.SVB, - Subthalamic nucleus.N.SUBM, - Submedial nucleus, „ »N .V , - Veiitral nucleus. ~O.CII, - Optic chiasma,PED. CER, - Cerebral peduncle.FED. MAM, - Mammillary peduncle.PEV.S. - Periventricular system,PIN, - pineal body,P.CO, - Posterior commissure# p.COL. - Posterior colliculus,PR.R, - Pre optic region#

S.G-.Co- Substantia grisea centralis,STR.MEDo - Stria medullaris,STR. TERM# - Stria terminalis*SUBC.O, - Subcommissural organ.T .CIN, - Tuber cinereum.TH. RAD, - Thalamic radiations,T.OLP, - Olfactory tubercle,TR.AM.HAB,, - Amygdalo-habenular tract, TR,CoHAB,L, - Lateral cortico-habenular tract, TR.G.HAB.M. - Medial cortico-habenular tract, TR .H .P . - Kabenulo-peduncular tract,TR.HYP, - Hypophysial tract,TR .M,TEG . - Mammi11o-tegmental tract,TR.M.TH, - Mammillo-thalamic tract,TRaOLP.L, - Lateral olfactory tract,TR,OP« - Optic tract,TR,OP .ACC,P. - posterior accessory optic tract# TR,PR#HAB,L« - Lateral preoptice-habenular tract, TRaPR.HAB.M, - Medial preoptico-habenular tract, V .I I I - Third ventricle.Z.INC, - Sona incerta.

EXPLANATI ON OF PIATES.

Plate 1

Plates :

Plate 4

plates

i Fig» 1.- median saggital section of the brain of Elephantulus, X3„

Fig. 2,- ventral aspect of the diencephalon,XlO.

Fig. 3,- dorsal aspect of the diencephalon,XlO*

and 3 ; Figs. 4 - 15 - Transverse sections through the diencephalon, showing the arrangement of the cell masses, X25*

i Figs* 16 - 23 - Horizontal sections through the diencephalon, showing the arrangement of cell masses, X20.

and 6 : Figs. 24 - 34 - Transverse sections through the diencephalon, showing the arrangement of the main fibre connections, X25.

PLATEM.INT.

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SELECTED BIBLIOGRAPHY.

ARIENS KAPPERS, C .U ., G .C . HUBER and E .C . CROSBY 1936 The comparative anatomy of the nervous system of vertebrates, including man. 2 Macmillan, New York*

BODIAN, D . 1937 An experimental study of the optic tracts and retinal projection of the Virginia opossum*J. Comp. Neur* 66, 113,

1939 Studies on the diencephalon of the Virginia opossum!.The nucle&r pattern In the adult, 71, 259.

194C Idem 11. The fibre connections in normal and experimental material* Ib id . 72, 207,

1942 Idem 111* The thalamo-cortical projection#Ibid , 77, 525.

HRENHER, S . 1946 The chromosome complement of Elephantulus, S. Afr. J . Med. S c i ., 11, Biol. Suppl., 71.

CLARK, W.E • LE GROS. 1928 On the brain of the Kacrosceli- didaeo J, An&t. 62, 245.

1929 The thalamus of the Tupala minor.Ibid . 63, 177.

1929a Studies on the optic thalamus of the Insectivora - the anterior nuclei, Brain. 55, 406.

1930 The thalamus of Tarslus. J . Anat. 64, 371.

1934 Early forerunners of man. Balllfire, Tindall and Cox, London.

1942 The visual centres of the brain and their connections. Physiol. Rev. 22 , 205.

EU.I0T-SMITH, G .H . 1910 The Arris and Gale fcectires. Lancet. JL, 1 .

GILBERT, C . 1944 The development of the post-renal vena cava in Elephantulus. S. Afr. J . Med. a c l ., 9 ,Biol. Suppl., 63«

GOIDBY, F. 1941 The normal histology of the thalamus of the phalange r , Trichosurus vulpecula# J* A n a t • 75, 197,

GURDJIAN, E .S . 1925 Olfactory connections In the albinorat, with special reference to the stria medullaris and anterior commissure* J * Corap* Neur* 38 , 127*

1927 The diencephalon of the albino rat*J* Comp* Neur* 43, 1*

HORST, C .J . van der, and J . GILL MAN. 1941 The menstrual cycle in Elephantulus* S* Afr* J. Med. S c i ., 7 Biol. Suppl. 73 .

HUXLEY, J .S . 1941 Evolution, etc* Allen and Unwin, London.

JOHNSTON, J .B . 1923. Further contributions to the study of the evolution of the forebrain* J* Comp* Neur* 35, 337*

LOO, Y*T • 1931 The forebrain of the opossum, Didelphys virginiana, 11. Histology* J. Comp* Neur* 52, 1*

MARBURG, 0* 1944 The structure and fibre connections of the human habenula* J* Comp* Neur* 80, 211*

PAPEZ, J.to* 1932 The thalamic nuclei of the nine-banded armadillo (Tatusia novemcenctata) J* Comp*Neur*56, 49*

RIOCH, D.Mc.K , 1929 Studies on the diencephalon ofcarnivora Part I . The nuclear configuration of the thalamus, epithalamus and hypothalamus of the dog and cat* J. Comp* Neur* 49, 1*

- 1929a Xd«n Fart II* Certain nuclear configurationsand fiber connections of the subthalemus of the dog and cat* Ibid* 49, 121*

1931 Idem Part III* Certain myelinated fiber connections of the diencephalon of the dog (Canis familiaris), cat (Fells doraestica), and aevisa (iSrossarchus ofcscurfity) Ibid. 53^ 319*

SOLMITZKY, 0 . 1938 The thalamic nuclei of Qua scrofa* Comp* Neur* 69 , 121*

WALKER, A •£• 1938 The primate thalamus. The University of Chicago Press, Chicago, 111*

1940 The medial thalamic nucleus# A comparative anatomical, physiological and clinical study of the nucleus medialis dorsalis thalami*J* Comp* Neur* 73, 87*

WRIGHT, M.K* 1945 The cell masses in the forebrain of the Elephant shrew* S* Afr* J. Med* Sci«, 10,Biol* Suppl., 19*

1947 Personal communication*

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