It is followed in some specialized Heteropoda and in the Euthyneura by a torsion in the opposite direction, or detorsion, which brings the anus farther back and untwists the visceral commissure (see Euthyneura, below).
The right half of the commissure with its ganglion is supra-intestinal, the left half with its ganglion infra-intestinal.
Visceral commissure short, tendency to concentration of all ganglia in dorsal side of oesophagus.
Visceral commissure fairly long, except in Runcina, Lobiger and Thecosomata.
This is shown by the labial commissure and pedal cords of the nervous system, by the opening of the gonad into the right kidney, and by other points.
Near the posterior border of the base of the cerebrum there is a great development of nervous fibres, which may probably be regarded as in part equivalent to the anterior commissure (Plate 37, figs.
It is especially deserving of notice, in connection with the nervous system of the above mentioned Nemertines and Peripatus, that the commissure connecting the two nerve-cords behind is placed on the dorsal side of the intestines.
Immediately in front of the pineal gland the roof of the thalamencephalon contains a transverse commissure (Plate 37, fig.
It is provided with a floor formed of nervous matter, in part of which, judging from Wilder's description, a well-marked commissure is placed.
It shews (1) the vaguscommissure with branches on one side from the medulla: (2) the intestinal branch of the vagus giving off a nerve to the lateral line.
We have found in the larva a largecommissure in this situation (Plate 37, figs.
A transverse commissure connects the two (vide fig.
Commissure uniting the roots of the vagus, and continuous with commissure uniting the posterior roots of the spinal nerves.
B), this is the position this commissure ought, undoubtedly, to occupy if derived from part of a nerve-ring which originally followed more or less closely the ciliated edge of the body of the supposed radiate ancestor.
The section passes through the anterior part of the pharynx at the level of the second commissure (co.
A head measured from the top of the forelock to the commissure of the lips= (C).
Distance, O, R, of the internal commissure of the eye from the superior border of the commissure of the nostril (G.
To Q, R, from the maxillary fissure to the superiorcommissure of the nostril (G.
Goubeaux and Barrier add: 'Or to the commissureof the lips.
F, R, the distance from the maxillary spine to the superior commissure of the corresponding nostril (G.
B, vg), continuous with the commissureof the posterior roots of the spinal nerves, and from this commissure the five branches are continued obliquely ventralwards and backwards, and each of them dilates into a ganglionic swelling.
This commissure has as yet only been found in a complete form in Elasmobranchii; but it is nevertheless to be regarded as a very important morphological structure.
Marshall thinks that this nerve may be the remains of the commissureoriginally connecting the roots of the third and fifth nerves.
It is probable, though the point has not yet been definitely made out, that this commissure is derived from the neural crest, which appears therefore to separate into two cords, one connected with each set of dorsal roots.
I have been unable to find a longitudinal commissure connecting them in their early stages; and I presume that they are at first independent, and become subsequently united into a continuous cord on each side.
At the period when the nerves have begun to shift their attachment to the spinal cord, there makes its appearance, in Elasmobranchii, a longitudinal commissure connecting the dorsal ends of all the spinal nerves (figs.
Although I have made some efforts to determine the eventual fate of the commissure uniting the dorsal roots, I have not hitherto met with success.
This commissure is probably homologous with, and derived from, a commissural band in the roof of the thalamencephalon, placed immediately in front of the pineal gland which is well developed in Elasmobranchii (fig.
From the lower commissure springs the lateral nerve, at a point whose relations to the branches of the vagus I have not certainly determined.
This nerve is connected by a commissure with those behind, but this fact may for the moment be left out of consideration.
The anterior white commissure is formed very shortly after the first appearance of the white matter.
In all Chaetopods this system consists of cerebral ganglia connected by a circumoesophageal commissure with a ventral ganglionated cord.
Commissure uniting this with ventral ganglion (not shown in fig.
The optic commissureshould be freely divided, and then, by bold strokes of curved scissors, or curved probe-pointed bistoury, the orbit may be fairly emptied by scooping out its contents.
A commissure uniting the two main tendons in the foot of certain birds.
A transverse commissure in the anterior part of the third ventricle of the brain; the anterior cerebral commissure.
A large transverse commissure in the third ventricle of the brain; the middle or soft commissure.
Commissure connecting the posterior roots of the spinal nerves.
The central end of a posterior nerve-root from the same embryo, with the commissure springing out from it on either side.
In the posterior part of the roof of the thalamencephalon is the small posterior commissure (Ahlborn, Zeits.
The dorsal part of the original anterior commissure becomes the fornix, and the paraterminal area is modified to form the septum lucidum.
The anterior commissure is divided, as in reptiles, into dorsal and ventral parts, of which the latter is the larger (fig.
Deep cut dividing the commissure between the left thumb and forefinger down to the carpal bones.
The high heel of a French boot was driven through the perineum one inch from the median line, midway between the anus and the posterior commissure of the labia majora.
Where the thalami come together and touch or unite on the median line, the junction is called a commissure (commiss.
Dotted line shows place of excision for clearing out the anterior commissure to restore the voice.
The tip of the anterior commissure laryngoscope can be used to expose either ventricle of the larynx by lifting the ventricular band, or it may be passed through the adult glottis for work in the subglottic region.
For growths in the anterior portion of the larynx, and in fact for the removal of most small benign growths, the anterior commissurelaryngoscope is especially adapted.
This is readily accomplished by direct laryngoscopy under local anesthesia, using the regular laryngoscope or the anterior commissure laryngoscope.
Anterior commissure twice afterward cleared of cicatricial tissue as in the other case shown in Fig.
A sharp anterior commissure is a large factor in good phonation.
With this instrument the anterior commissure is readily exposed, and because of this it is named the anterior commissure laryngoscope (Fig.
As mentioned above the anterior commissure laryngoscope and the esophageal specula make very efficient pleuroscopes; but three different forms of pleuroscopes have been devised by the author for pleuroscopy.
A small stomatogastric commissure bearing two small ganglia arises from the cerebral ganglia and surrounds the oesophagus.
The four cords are all connected anteriorly with the cerebral commissure which lies above the buccal mass anteriorly.
From the points where the cords meet the cerebral commissure, arise on each an anterior labial commissure and a stomatogastric commissure.
The supra-rectal commissure may be present and bear an ovoid ganglion; or may be wanting.
Defn: A commissureuniting the two main tendons in the foot of certain birds.
Defn: A large transverse commissure in the third ventricle of the brain; the middle or soft commissure.
Defn: A transverse commissure in the anterior part of the third ventricle of the brain; the anterior cerebral commissure.
The two stellate ganglia are connected, except in Sepiola, by a transverse supra-oesophageal commissure, which represents the pallial cords united by a commissure above the intestine in Amphineura.
A labial commissure arises by a double root from the cerebral ganglia and gives off a stomatogastric commissure, which passes under the pharynx immediately behind the radula and bears a buccal ganglion on either side.
The dorsal sac is formed by that part of the roof of the thalamencephalon lying between the habenular commissure and the region of the velum.
B) lying dorsal to the anterior commissure and composed of fibres connected with the pallial region of the two hemispheres.
Farther forwards on the floor or anterior wall is the anterior commissure (see below).
The posterior commissure is situated in the boundary between thalamencephalon and mid-brain.
The habenular or superior commissure situated farther forwards connects the two ganglia habenulae.
At the height of the posterior commissure one finds the last of these trigeminal cells.
The first of these commissural bands is in the position of the posterior commissureconnecting the two optic thalami.
This naturally is simply the commissure between the two supra-oesophageal ganglia; anterior to it, in the middle line, equally naturally, the anterior end of the old stomach wall still exists as the lamina terminalis.
Brownsville, Texas; mesostyle of M1 and M2 relatively smaller as are second commissure and cingulum of M3; coloration of No.
The two cavities in the cephalic commissure unite dorsally, but ventrally open into the first somite of the trunk.
The oesophageal commissure is however completed ventrally by the ganglia of the pedipalpi.
Eupolia girardi is especially well shown with its small dorsal and large ventral commissure and with three brain lobes.
The small dorsal commissure is shown with its usual median extension.
From the larger ventral commissure come the two nerves to the proboscis, lateral to these are the nerves to the intestine, while from the ridge of the lateral cords the lateral nerves are shown.
A delicatecommissure running over the gullet connects these ganglia.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "commissure" in a variety of sentences. We hope that you will now be able to make sentences using this word.
