Word Finder - ulna

definition

The bone of the forearm that extends from the elbow to the wrist on the side opposite to the thumb, corresponding to the fibula of the hind limb. Also, the corresponding bone in the forelimb of any vertebrate.

synonyms

• elbow bone

The two bones in the forearm are the radius and the ulna.

Described the features & immediately went on to say that I thought this was a low ulna nerve palsy because...

Mechanism of injury probably similar to type I. Treatment Usually requires surgical stabilization of the radius and ulna fractures.

The distal end of the humerus ends in a trochlea, with a larger knob for the ulna and a smaller oval knob for the radius.

The ulna is curved and rather stout; it articulates with both carpal bones; the cubital quills often cause rugosities on its dorsal surface.

The wing of the bird is folded in a unique way, namely, the radius parallel with the humerus, and the whole wrist and hand with their ulnar side against the ulna; upper and forearm in a state of supination, the hand in that of strong abduction.

The flexor digitorum sublimis muscle arises fleshy from the long elastic band which extends from the inner humeral condyle along the ventral surface of the ulna to the ulnar carpal bone, over which the tendon runs to insert itself on the radial anterior side of the first phalanx of the second digit.

In the fore-limb the upper and lower series of carpal bones scarcely alternate, but in the hindfootthe astragalus overlaps the cuboid, while the fibula, which is quite distinct from the tibia(as is the radius from the ulna in the fore-limb), articulates with both astragalus and calcaneum.

Reduction of the ulna from a complete and distinct bone to a comparatively rudimentary state in which it coalesces more or less firmly with the radius.

Among the prehistoric people are many female skeletons with a fractured right ulna sustained in warding off blows, and some of these women had died while still wearing splints.

The femur has a small third trochanter, the radius and ulna and tibia and fibula are respectively separate, at least in the young, and the fibula articulates with the astragalus.

In old individuals the bones of the forearm (radius and ulna) became welded together about half-way down, although they remained free above.

Moreover, the crowns of the hinder cheek-teeth are taller, and more distinctly crescentic, both feet are two-toed, the ulna and radius are fused, and the fibula is represented only by its lower part.

Radius and ulna typically avine, 2.1 in.

Six or seven remiges were attached to the hand, ten to the ulna.

In the fore-limb the clavicle and the radius and ulna are well developed, allowing of considerable freedom of motion of the fore-paw.

The ulna is rudimentary, being represented by little more than the olecranon.

Radius confluent with ulna, and tibia with fibula; tarsus (astragalus and calcaneum) elongate, forming an additional segment in the hind limb.

The orbit is surrounded by a bony ring; the ulna and radius in the fore, and the tibia and fibula in the hind-limb are united, and the feet are of the types described above.

I also have a bowing in the left arm where the radius is shorter than the ulna bone.

Full extension of the joint is blocked by the olecranon of the ulna contacting the olecranon fossa on the back of the humerus.

Leave well alone but can do shortening of distal ulna and radius closing wedge osteotomy.

In most birds the tendon is split into several portions, one of which is often attached to the outer side of the ulna, below the elbow joint, while others are in variable but characteristic ways connected with similar slips of the propatagialis longus.

The challenge is to obtain stable fixation of the ulna without violating the trochlear notch with screws.