The vertebræ are fixed to one another by outgrowths of bone which bridge across the intervertebral spaces, and there is a slight lateral deviation to the left in the mid-dorsal region.
An acute infective condition of the vertebræ, intervertebral discs, and spinal ligaments occasionally occurs during convalescence from typhoid fever.
The arachno-pia invests the cord and furnishes a sheath to each of the spinal nerves as it passes out through the intervertebral foramen.
Flexion is accompanied by compression of the intervertebral discs, and by a slight forward movement of each vertebra on the one below it.
The nerves are liable to be pressed upon as they pass through the intervertebral foramina, and this gives rise to pain and other disturbances of sensation in their area of distribution.
It hangs from the edge of the foramen magnum as a tubular sac, and is connected to the bones only opposite the intervertebral foramina, where it is prolonged on to each spinal nerve as part of its sheath.
Total dislocation, in which the articular processes on both sides are displaced and the contiguous intervertebral disc separated, is rare, and is met with chiefly in the lower cervical region.
Since the united thickness of the intervertebral substance in an adult man is about 3.
In fact, whether the pelvis is supported by the lower limbs or by a chair, the intervertebral disks are in either case compressed by the weight of the bust as a whole.
Transverse section through an intervertebral region of the same larva as fig.
Note the intervertebral foramina for the exit of the nerves from the spinal cord, and the intervertebral discs.
With the exception of the neck, there is a ganglion for each intervertebral space.
Others extended through the first lumbar vertebra into the intervertebral cartilage, between it and the second lumbar vertebra.
The aperture by which it entered the intervertebral cartilage next above, was situated just below and anterior to the intervertebral foramen, from which the upper margin was about one-quarter of an inch distant.
The cartilage in each of the intervertebral regions soon becomes divided into two parts which form the articular faces of two contiguous vertebrae.
Very shortly afterwards each intervertebral region becomes segmented into two parts, which respectively attach themselves to the contiguous vertebral regions.
Vertebral constriction of the notochord as effected in Mammalia, the intervertebral parts of the cartilaginous sheath being converted into intervertebral ligaments.
The constricted intervertebral sections of the notochord rapidly disappear, while the vertebral sections become partially converted into cartilage, and only cease to be distinguishable at a considerably later period.
A part of each intervertebral region, immediately adjoining the notochord, does not however undergo this division, and afterwards gives rise to the ligamentum suspensorium.
There is a persistent and continuous notochord which, owing to the small development of the intervertebral cartilages, is narrower in the vertebral than in the intervertebral regions.
In the intervertebral regions the cartilage becomes thickened, as in Amphibia, and gradually constricts the notochord.
The body of the vertebra is formed of a slightly hourglass-shaped osseous tube, united with adjoining vertebrae by a short intervertebral cartilage.
Amphibian type, with intervertebral constrictions of the notochord by the intervertebral parts of the cellular sheath.
It softens both the vertebrae and intervertebral cartilages, and either their anterior or posterior portion may be irregularly developed, and be either too high or too low.
The intervertebral and tempero-maxillary articulations have very rarely suffered in the writer's experience.
However, even when beginning in the hip or shoulder, the disease is apt to involve several of the intervertebral articulations, and not unfrequently to extend to other joints than the one first affected, and even to the peripheral joints.
These nerves divide, immediately after their emergence from the intervertebral foramina, into an interior and a posterior branch.
In long-standing cases acutely tender points are developed in one or more of these situations; not unfrequently the most decided of these spots is where it gets overlooked, namely, opposite the intervertebral foramen.
In the next stage, as seen in Gyrinophilus porphyriticus, the growth of intervertebral cartilage has caused the almost complete obliteration of the notochord intervertebrally, and its entire disappearance vertebrally, i.
At a point not far from the anterior end, this canal communicates with the exterior by a pair of minute holes which correspond with the intervertebral foramina.
The intervertebral cartilage now forms the main connection between successive vertebrae, and sometimes cases are found whose condition approaches that of definite articulations.
The ventral portions of the intervertebral discs are sometimes ossified, forming wedge-shaped inter centra, as in Geckos, and the cervical vertebrae of Sphenodon.
In the third stage differentiation and absorption of the intervertebral cartilage has given rise to definitely articulating opisthocoelous vertebrae.
Except in the sacral region the vertebrae are movably articulated to one another, while their centra are separated from one another by cartilaginous =intervertebral discs=.
In Talpa and Galeopithecus the intervertebral discs of the thoraco-lumbar region instead of being cartilaginous have ossified forming inter centra, a condition met with in very few mammals.
Portions of the notochord commonly persist in the intervertebral spaces.
In =imperfect joints=, such as the intervertebral joints of mammals, the two contiguous surfaces are united by a mass of fibrous tissue which allows only a limited amount of motion.
Readily recognisable remains of the notochord are still found at each end of the intervertebral constriction.
The bodies of the vertebrae except those of the sacrum and coccyx are separated, and at the same time connected, by the intervertebral disks.
The intervertebral disks first appear in the Crocodilia, the highest existing order of reptilia.
In the new-born child there is a large pear-shaped cavity in each intervertebral disk, filled with a gelatinous mass of cells (Figure 2.
Each of the intervertebral rings of cartilage becomes eventually divided into two parts, and converted into the adjacent faces of contiguous vertebrae, the curved line where this will be effected being plainly marked out.
Between it and the gelatinous tissue of the notochord within there is a very thin unmodified portion of the sheath, which is continuous with the thinner intervertebral parts of the sheath.
Between it and the gelatinous tissue of the notochord there remains a thin unmodified portion of the sheath, which is continuous with the intervertebral parts of the sheath.
At each end, the intervertebral cartilages are becoming penetrated and replaced by beautiful branched processes from the homogeneous bone which was first of all formed in the perichondrium (Plate 42, fig.
As these rings are formed originally by the spreading of the cartilage from the primitive neural and haemal processes, the intervertebral cartilages are clearly derived from the neural and haemal arches.
The histological structure of the intervertebral cartilage is very distinct from that of the cartilage of the bases of the arches, the nuclei being much more closely packed.
Now, however, by the great growth ofintervertebral cartilage there have appeared (Plate 42, fig.
If the above statements with reference to the origin of the intervertebral cartilage in the two types are true, it is clear that no homology can exist between structures so differently developed.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "intervertebral" in a variety of sentences. We hope that you will now be able to make sentences using this word.
