Search results

II. The mid-brain or mesencephalon extends from the posterior boundary of the mesencephalon insensibly into the spinal cord.

...as to the front of the infundibulum, which occupies a position beneath the mesencephalon, the thalamus having been caudo-ventrally appressed upon the corpora quadri ...ian length being much greater than that of cerebrum. The ventricles of the mesencephalon are large and extend far laterad, while the tectum is highly developed.

c. The mesencephalon with its cavity, mesocoele ; sections farther cephalad show the junction of c. The kilos, the tela, the cestus, and a mesal transitory sulcus in the mesencephalon.

...ce of definite terminations, though the fascicles reaclj backward into the mesencephalon (hypothalamus and interpeduncular region), a condition not yet noted in oth

...tion of the corpora quadrigemina. In Mrs. Gage's case this division of the mesencephalon is much more marked.

...tly compressed opposite the posterior commissure. In the blind Proteus the mesencephalon is smaller than the ...Anura, owing to the large optic nerve nuclei. The size of the roof of the mesencephalon is in direct proportion to the functional perfection of the eyes. The cereb

the posterior end of the infundibulum lies the mesencephalon prosencephalon and thick walled mesencephalon, but the paraphysis is not present and appears first in an embryo of 11 5 m

...l ends, where the cranial and caudal neuroporic apertures are present. The mesencephalon is flexed upon itself, in such a way as to bring the prosencephalon almost

...ponding to the fields, with indications of the telecephalon, diencephalon, mesencephalon and myelencephalon. (From Lehmann 1948.)

Mesencephalon 51 ...in plates 1 and 4, By the cephalic flexure (Flexxeph.) which occurs in the mesencephalon (Mesen.) the fore-brain is bent at an acute angle to the hindbrain. The cer

head bend occurs in a part of the tube called the mid-brain (mesencephalon). isthmus. The mesencephalon remains undivided; the fore-brain is represented by the diencephalon poster

...12, 13, 17). Part of its medial wall is fused with the lateral wall of the mesencephalon, but its anterior end is free (figs. 21, 22). The roof of each lateral rece ...essus lateralis into the region of fusion between the diverticulum and the mesencephalon (figs. 4, 5, 23) . The medullated fibers of the cerebellum accumulate chief

...al hfe, and its significance as a measure of growth of that portion of the mesencephalon below the iter is particularly questionable. In some fetuses of three to fo

...ce of definite terminations, though the fascicles reaclj backward into the mesencephalon (hypothalamus and interpeduncular region), a condition not yet noted in oth ...nd, Held claims that the mesencephalic root takes origin from cells in the mesencephalon and from the locus coeruleus. Bregmann states that a lesion of the motor po

...of of the diencephalon. Between ^ and ^ of the roof between the pineal and mesencephalon is occupied by the post-commissure. The remaining portion is precisely simi The dorsal roofs of the mesencephalon, diencephalon and primary prosencephalon are approximately equal in extent

...MENTUM, PULVINAR, FALX, TENTORIUM, THALAMUS, CALLOSUM, STRIATUM, DENTATUM, MESENCEPHALON, PALLIUM, OLIVA, CLAVA, OPERCULUM, FISSURA CENTRALIS (for /. Rolaudo, etc.) ...cm. media, and cm. posterior distinguish members of a conventional series. Mesencephalon, prosencepJiakvi and nietencephalon designate members of a natural series,

...cup-shaped nucleus, there were no efferent fibres to the cortex nor to the mesencephalon; that the efferent fibres all ran to the other nuclei of the thalamus, ...1.8 mm. A gi'oove marks the limit between the prosencephalon, P., and the mesencephalon, M. The stalk of the optic vesicle appears on the lateral aspect of the pro

...rward, but they extend backward so as to hide the thalamencephalon and the mesencephalon in a dorsal view, and even project beyond the cerebellum in Man (fig. 109) Mesencephalon

...pophysis (posterior lobe) ; isth., isthmus; med., medulla oblongata; mes., mesencephalon; ol. b., olfactory bulb; o. r., optic recess; p., pons; p. b., pineal body; Mesencephalon. The mid-brain remains undivided, and its walls become very thick. Dorsally

Chapter III. The Mid-brain, Mesencephalon 53 ...arther backward, certainly not as far as the extreme posterior part of the mesencephalon, and mdeed it seems very improbable that they should go so far backward. It