DISSECTION OF THE HEAD AND NECK 



327 



(I) Gray or ashen tubercle (tuberculum cinereum) (0. T. tubercle of 

 Rolando). 



(m) Slender funiculus (funiculus gracilis) (O. T. column of Goll). 

 (ma) Club (clava). 



(n) External arcuate fibres (fibrae arcuatae externae) (O. T. super- 

 ficial arcuate fibres). 



Pons [Varolii]. 



(a) Basilar groove (sulcus basilaris), 



(b) Oblique bundle of pons (fasciculus obliquus [pontis]). 



(c) Brachium ("arm") of pons (brachium pontis) (0. T. middle cere- 



bellar peduncle). 



Sulcus hypothalamicus [Monroi] 

 Corpus fornicis \ 

 Foramen interventriculare [Monroi] \ 

 Septum pellucidum , ' 

 Lamina rostralis 

 Rostrum corporis 



callosi 

 Genu corporis 



callosi 



Gyrus subcallo-l 

 sus [Pedunculuss 

 corporis callosi] . 

 Sulcus parolfac- 

 torius posterior 

 Commissura ante- 

 rior [cerebri] - -JHi 

 Sulcus parollac- 



tori us anterior ^-- 



Area parolfac- ...s 



toria [Brocae] 

 Lamina terminalis --_ ' f 

 Recessus optic us -*^ 

 Recessus inf undibuli _-* 

 Chiasma opticum 



Infundibulum 

 Hypo- \ lobus anterior 

 physis | lobus posterior 



Recessus anterior fossae-' / / 

 interpeduncularis / ,. ' / 

 Corpus mammillare'' // 

 Fossa interpeduncularis [Tarini] / 



Nervus oculomotorius-' / / 



Sulcus n. oculomotorii / 



Recessus posterior fossae interpeduncularis / , 

 Decussatio brachii conjunrtivi 

 Pons [Varolii] (fibrae superficiales) 

 Fasciculi longitudinal es [pyramidal es] 



Foramen caecum / 

 Fasciculus longitudinalis medialis 

 Medulla spinalis- 



FIG. 144. 



Truncus corporis callosi 

 ; Massa intermedia 

 Thalamus 



j Tela chorioidea ventriculi tertii 

 Ventriculus tertius 

 I Aditus ad aquaeductum cerebri 

 Commissura posterior [cerebri] 

 ' Recessus pinealis 



Commissura habenularum 

 Recessus suprapinealis 



Corpus pineale 

 ^ Lamina quadrigemina 

 !k/ Aquaeductus cerebri [Sylvii] 

 Splenium corporis callosi 



Nucleus n. trochlearis 

 ^ ,Velum medullare anterius 

 mf Lobulus centralis 



Mi.nticulus (Culmen) 

 ^^^^.Lingula cerebelli 

 ^L Ventriculus quartus 



Fastigium 



. Monticulus (Declive) 



k . Laminae medullares 



Folium 



vermis 



XTuber yennia 

 " x ^ Pyramis 

 [vermis] 



t -^ 'Corpus medullare 



Nodulus \ Uvula [vermis] 



Velum medullare posterius 



Median section of the brain-stem. Right half seen from the left. (Only a small part of the pallium is 

 shown.) (After Spalteholz, Hand Atlas of Hum. Anat., Leipzig, 1903, p. 63G, Fig. 695.) 



Isthmus of Rhombencephalon (Isthmus rhombencephali). 



(a) Brachium conjunctivum ("connecting arm") of cerebellum (bra- 



chium conjunctivum [cerebelli]) (0. T. superior cerebellar pe- 

 duncle). 



(b) Fillet or ribbon (lemniscus) . 



(ba) Lateral fillet (lemniscus lateralis). 



(bb) Medial fillet (lemniscus medialis) (0. T. ribbon of Reil). 

 (be) Trigone of fillet (trigonum lemnisci). 



