In the Cambridge Greensand genera the part of the ilium above the acetabulum for the articular head of the femur appears to be always broken away, so that the relation of the sacrum to the pelvis has not been observed.
Among reptiles the general position of the acetabulum is at the forward termination of the ilium, though the Crocodile has some extension of the bone in both directions, without forming distinct anterior and posterior processes.
Among existing animals this relation of the bone is nearer to birds than to any other type, since birds alone have the ilium extended from the acetabulum in both directions.
The acetabulum for the head of the femur is imperforate, being a simple oval basin, as in Chelonian reptiles and the higher Mammals.
In Birds the acetabulum is perforated, as in many of the fossils named Dinosaurs, and in Monotremata.
The posterior third of the acetabulum is formed by a small bone, the =ischium=, which likewise meets its fellow in a median symphysis.
The pubis is united to both ilium and ischium, the acetabulum has a large unossified space, and neither pre-pubes nor post-pubes meet in ventral symphyses.
The acetabulumis deep and the obturator foramen large, and there is frequently a well-marked ischial tuberosity.
In the Echidnidae, but not in Ornithorhynchus[112], the central portion of the acetabulum is unossified as in birds.
In neither Manatee nor Dugong is there any trace of an acetabulum but one can be made out in Halitherium.
The acetabulum is perforated in Echidna as in birds, but not in Ornithorhynchus.
This perforation of the acetabulum in Echidna is a secondary character occurring late in development, and consequently is not of phylogenetic importance.
A less formidable proceeding may be useful in cases where the acetabulum is diseased, but not deeply.
When the acetabulum is also diseased the prognosis is much more unfavourable than when it is sound.
Traction is exerted in the same direction from the acetabulum that the head of the femur is situated and by pressing over the joint, the displaced bone may be returned in position.
The joint capsule encompasses the articulation and is attached to the brim of the acetabulum and the edge of the head of the femur.
It naturally follows that greater injury is done when the pelvic girdle is broken than when it is not, except in cases where the acetabulum is involved and its brim not completely divided.
The obturator foramen is a small oval opening posteroventral to the acetabulum between the ischium and the pubis.
The ilio-ischiatic fenestra is a large oblong opening behind the acetabulum between the ilium and the ischium.
The muscle arises from the ventrolateral surface of the ilium anterior to the acetabulumand posterior to the origin of M.
The ventral acetabulum is very nearly twice as large as the oral sucker.
The acetabulum is completely surrounded by these three bones, but its cup always retains an open foramen; from its posterior rim arises the strong antitrochanter.
In front of the acetabulum a thick process of the ilium descends to meet the pubis, and a similar process behind meets the ischium.
Reduction is attempted by extension and rotation outwards, at the same time pulling the head of the bone towards the acetabulum by means of a towel passed under the thigh.
Acetabulum and turibulum are both formed on noun stems, and are both receptacles for holding the material denoted by the noun stem.
But all the examples of acetabulum show the noun extended to mean any kind of vessel, or a measure: melanthi acetabulum conterito in vini veteris hemina, Cato, R.
The HIP JOINT, like the shoulder, is a ball and socket, but does not allow such free movement; this is due to the fact that the socket or acetabulum is deeper than the glenoid cavity and that the capsule is not so lax.
When the rim of the acetabulum has been fractured, the patient must be confined to bed with extension for six to eight weeks, to avoid the risk of re-dislocation.
As a result of the pressure of the carious articular surfaces against one another, the acetabulum is enlarged and the upper end of the femur is drawn gradually upwards and backwards within the socket.
Abscesses which form within the pelvis originate either in connection with the acetabulum or in relation to the psoas muscle where it passes in front of the joint.
Pain elicited on driving the head against the acetabulum may occasionally assist in the recognition of hip disease, but the diagnostic value of this sign has been overrated and, in our opinion, this test should be omitted.
Advanced Tuberculous Disease of Acetabulum with caries and perforation into pelvis.
Fracture of the upper and back part of the rim of the acetabulum may accompany or simulate dorsal dislocation of the hip.
Those that are directly connected with disease of the acetabulum may remain localised to the lateral wall of the pelvis, or may spread backwards towards the hollow of the sacrum.
The acetabulummay "wander" backwards and upwards, as in tuberculous disease.
That part of the capsule which arises from the lower margin of the acetabulum stretches across the socket and partly shuts it off from the rest of the joint cavity.
The upper end of the femur and the acetabulum are affected with about equal frequency.
In the acetabulum the absorption takes place in an upward and backward direction, whereby the socket becomes enlarged and elongated towards the dorsum ilii.
The edge of the acetabulum is specially strong above and behind, while at its lower margin there is a gap, bridged over by the labrum glenoidale (cotyloid ligament).
The latter by its firm grasp of the head allows of little play in the joint; hence vibrations are conveyed directly to the acetabulum in continuous waves, and rocking of the articular surfaces is prevented.
I never observed a fracture of the floor of the acetabulum by a bullet which had entered from the back of the pelvis, although tracks entering by the great sciatic notch were not infrequent.
It is best illustrated in arthritis deformans of the hip in which new bone formed round the rim of the acetabulum mechanically arrests the excursions of the head of the femur.
Limitation of movement and locking at the hip-joint when due to new bone round the edge of the acetabulum may be greatly relieved by removal of the bone--a procedure known as cheilotomy.
Anterior to theacetabulum the origin is aponeurotic, and the edge of this aponeurosis passes over the proximal end of the femur.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "acetabulum" in a variety of sentences. We hope that you will now be able to make sentences using this word.
