Human anatomy, including structure and development and practical considerations . dle and lower fibres. The free portion of the dorsal surface of the ])ons contributes the upper halfof the floor of the fourth \entricle and is, therefore, not visible until the roof of thatcavity is removed. Above the middle j^eduncle, the sides of the pons are blendedwith the overlying superior cerebellar peduncles, which, in conjunction with theintervening; superior viedtillary velum, complete dorsally the ring of tissue sur-rounding the narrowed superior end of the fourth ventricle. STRICTURE OF THE
Human anatomy, including structure and development and practical considerations . dle and lower fibres. The free portion of the dorsal surface of the ])ons contributes the upper halfof the floor of the fourth \entricle and is, therefore, not visible until the roof of thatcavity is removed. Above the middle j^eduncle, the sides of the pons are blendedwith the overlying superior cerebellar peduncles, which, in conjunction with theintervening; superior viedtillary velum, complete dorsally the ring of tissue sur-rounding the narrowed superior end of the fourth ventricle. STRICTURE OF THE PONS VAROLII. \iewed in transverse sections the pons is seen to include two clearly definedareas, the ventral and the dorsal (Fig. 933). The ventral part (pars l)asilaris)presents a characteristic picture in which the large j^yraniidal tracts are covered in Y\o. 933. Abducent Rbres Superior cerebellar lieduntle ~Facial fibres Substantia (.clatinosa Spinal root of \^ Facial nucleus Trapezoidal fibres SuDerior cerebellar peduncleNucleus Post, long Nucleus of VI fasciculus of VI.
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
