/ 



MEDULLA OBLONGATM. 



81 



An under View of the Cerebellum, seen from behind. 



crus of cerebellum, e, e. Crura cerebri. i. Notch on 

 tosterior border, k. Commencement of horizontal fissure. 

 . Flocculus, or subpeduncular lobe. m. Medulla oblon- 



the brain; secondly, the de- 

 scending fibres, which con- 

 verge from the periphery to- 

 wards the corpora striata, 

 and then pass downwards to 

 the motor tract of the me- 

 dulla spinalis; and, thirdly, 

 the commissural fibres, which 

 establish a connexion be- 

 tween the various parts of 

 the periphery, and of the 

 substance of the brain. The 

 bulk of the human brain, and 

 of that of the higher animals, 

 is greatly dependent upon the 



1 . i i The medulla oblongata, m, having been cut off a short 



large proportion borne by way beiowthepons. (Ren./ c.PcSwVaroiii. a. Middle 

 these last fibres to the rest. 1 

 The cerebellum occupies 



,1 -I . . i / gata cut through, q. to s. The inferior vermiform process, 



tne lOWer OCClpltal lOSSSe, Or lying in the vallecula. p. Pyramid, r. Uvula, n, n. 



f\f tViP pnvitir f\f tViA Amygdalae, s. Nodule, or laminated tubercle, x. Poste- 



OI tilt; LdiVli Y 7 Oi llie r j or ve lum, partly seen. w. Right and left hemispheres 



T-jpripofTi flip fpnrn- of cerebellum. 3 to 7. Nerves. 3, 3. Motores oculorum. 



, tent0 - 5. Trigeminal. 6. Abducent nerve. 7. Facial and audi- 



num cerebelli. Its size and tory nerves. 

 weight, like those of the 

 brain, differ according to the in- 

 dividual, and the age of the 

 subject under examination. We 

 do not observe convolutions in 

 it. It appears rather to consist 

 of laminae in superposition, sepa- 

 rated from each other by fur- 

 rows. We shall see, hereafter, 

 that the number of cerebral 

 convolutions has been esteemed, 

 in some respects, to accord with 

 the intellect of the individual; 

 and Malacarne asserts, that he 

 has observed a similar corre- 

 spondence, as regards the num- 

 ber of laminae Composing the Ce- Posterior Superior View of the Pons Varolii, 

 rebellum; that he found Only Cerebellum, and Medulla Oblongata and M. Spi- 



three hundred and twenty-four i, i. ijnum cerebri. 2. Pons varoiii or tuber an - 



in the Cerebellum of an insane n ul , are - 3. Its middle fowa. 4. Oblique band of me- 



. dullary matter seen passing from its side. 5. Exter- 



Whllst in Others he nal surface of the crus cerebelli. 6. Same portion 



i i j n i , deprived of outer layer. 7. Nervous matter which 



COUnted. Upwards OI eigHt unites it to 4. 8. Trigeminus or fifth pair of nerves. 



9. Portion of the auditory nerve. The white neurine 

 seen passing from the oblique band which comes 

 From the medullary Dart Of f rom tne corpus restiforme to the trigeminus nerve in 

 , ,, i ' i front, and the auditory nerve behind. 10,11. Supe- 



" Cerebellum, tWO large White rior portion of the hemispheres of the cerebellum. 

 , , ,1 17- v* 12. Lobulus amygdaloides. 13. Corpus olivare. 14. 



paSS tO the pOnS Varolll, Corpus pyramidale. 15. Medulla spinalis. 



VOL. I. 



1 Carpenter, Human Physiology, p. 215. Lend., 1842. 



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