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Biomedical subjects

A Baruch

Publications and source records attributed to A Baruch.

30 records · Page 2Linked to original sources
PubMed1987

Simple bone cyst of the metacarpal.

Simple bone cyst is a benign tumor-like lesion that occurs principally in the humerus and the femur. Occurrence within the hand is rare and involvement of the metacarpals is even more uncommon. Two similar cases of a simple bone cyst affecting the metacarpals were treated by complete excision of the cyst and replacement by a cortico-medullar autogenous graft.

Bone Cysts↗
PubMed1982

The cytoarchitecture of the dorsal cochlear nucleus in the 3-month- and 26-month-old C57BL/6 mouse: a Golgi impregnation study.

The cytoarchitecture of the dorsal cochlear nucleus (DCN) was compared in 3- and 26-month-old C57BL/6 mice. The effects of genetically controlled progressive hearing loss present in the CNS in this mouse strain were analyzed with Nissl-stained and Golgi-impregnated material. The DCN was divided into the superficial molecular, an intermediate fusiform-granule, and the deep polymorphic layers. The molecular layer (ML) consisted of many fibers and a few small ovoid to spherical, fusiform, and granule cells. The fusiform-granule layer (FL) contained large fusiform and many granule cells. Most FL fusiform cells were oriented with their long axes perpendicular to the DCN surface and were present as small aggregations or individually. Cartwheel cells were adjacent to the FL fusiform cells. The deep polymorphic layer (PL) contained spherical, fusiform, granule, and multipolar neurons. The granule cells formed a dorsal cap of the DCN. From this cap, sheets of granule cells separated the DCN from the posterior ventral cochlear nucleus (PVCN) and from the brainsteM. The internal organization, neuronal location, orientation, and morphology were similar in both age groups. The granule cells had four to five primary dendrites, varicosities, and few to no dendritic appendages. The FL fusiform cells displayed different dendritic morphology in the two ages. One or two elaborate primary ML apical dendrites in the 3-month-old mice were covered with spikelike dendritic spines. The basal one or two PL dendrites were less elaborate and had few dendrite spines. In contrast, FL fusiform neurons in 26-month-old mice had regular dendritic varicosities and fewer spines which were short and stumpy. Basal dendrites had varicosities and interruptions. Cartwheel neurons in 3-month-old mice had elaborate ML dendritic trees covered with dendritic spines. In 26-month-old mice the dendrites had many varicosities and fewer short blunted dendritic spines. Large multipolar neurons in older mice had thinner dendrites with more varicosities than were in the 3-month group. In both age groups multipolar cells had few dendritic spines limited distally. Small and large spherical cells had two to five primary dendrites with varicosities, little higher-order branching, and spines. Fusiform cells had one or two primary dendrites, little secondary branching, and few to no spines. Minor degenerative changes were noted in spherical and fusiform cells in the two age groups. These included dendritic varicosities, interruptions, and some irregularities of somata surface. Degenerative changes present in the cochlea had significant effects on a limited population of DCN neurons. Finally, the neuronal morphology and architecture of the DCN in C57BL/6 mouse is similar to other mammalian species.

Animals↗
PubMed1980

Angulated bone peg.

The use of an angulated bone peg in arthrodesis of a digital joint is presented. The technique was demonstrated in two patients with severe bone loss. A bone graft was fashioned into an angulated peg of the desired angle and size and inserted in both sides of the gap. The suggested technique preserves the finger's length, maintaining the necessary angulation, and provides adequate fixation.

Adult↗
PubMed1979

Distraction-lengthening of digital rays in the management of the injured hand.

The distraction-lengthening principle and apparatus, formerly used in the hand for reconstruction in congenital anomalies and traumatic amputations, is described for reconstruction of metacarpals and phalanges shortened by injuries, especially gunshot wound, where those bones have lost significant length. Hands in which single metacarpals have been shortened or in which multiple digits are involved may benefit from the technique.

Adult↗
PubMed1977

False aneurysm of the digital artery.

A case of false aneurysm of the digital artery is described. To the best of our knowledge it is the first reported case of false aneurysm involving the thumb. The aetiological factors which are usually responsible for the development of a false aneurysm are briefly discussed. The most common factor seems to be a direct injury of the arterial wall by a sharp tool and continuing flow of the blood in the artery. Although the fingers are commonly exposed to injuries with sharp tools, development of a false aneurysm in them seems to be extremely rare.

Adult↗
PubMed1976

Osteoarthritis at the base of the thumb. The concept of monoarticular reconstruction.

Osteoarthritic affection of the base of the thumb involving 148 hands has been studied. Isolated osteoarthritis of the trapezio-metacarpal joint was found to be the largest group including a total of 111 hands. Reconstruction of this particular joint by a new technique is described and long-term results reported. A small series of isolated osteoarthritis of the trapezio-scaphoid joint is presented and reconstruction by replacing the affected articular surface of the carpal scaphoid is described. Osteoarthritic involvement of more than one of the articular surfaces of the trapezium was found in a group of 31 hands. In all of them the trapezio-metacarpal joint was predominantly affected. The rationale for monoarticular reconstruction of the trapezio-metacarpal joint, regardless of the extent of involvement, is discussed in detail.

Adult↗