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Biomedical subjects

L Weh

Publications and source records attributed to L Weh.

44 records · Page 3Linked to original sources
PubMedDate not supplied

[Sudden deafness and biometric function analysis of the cervical spine].

Theories concerning the influence of function disturbances of the cervical spine on the development of sudden hearing loss should be re-examined. Forty-eight patients with unilateral sudden hearing loss and 94 controls were examined. X-rays of the cervical spine were made in lateral projection in normal position, and in maximum flexion and extension. The posture and movement of the vertebrae were recorded using a computer digitalization program. Overall mobility of the cervical spine was reduced in the group with sudden hearing loss: reduced movement was found in segments C2/C3, C5/C6, and C6/C7. Segments P0/P1 and C1/C2 were conspicuous by very high standard deviations in the group with sudden hearing loss. The results indicate that sudden hearing loss and function disorders of the cervical spine are related.

Biomechanical Phenomena↗
PubMedDate not supplied

[Innervation disturbances of the quadriceps muscle in chondropathia patellae. A critical appraisal of the current concept of chondropathia].

In a group of patients with typical histories of chondropathy, but in whom no other criteria of selection were applied, evidence of neurogenic damage in the quadriceps muscle was found. Innervational damage was also found regularly in the corresponding segments of the paravertebral musculature. Only in three cases, in which horn cell damage was suspected, were there no changes in the paravertebral musculature. There were abnormal structural or functional findings in the lumbar spine in all the patients. A disequilibrium between the median and lateral vastus groups, attributable to innervation, was postulated and subsequently confirmed by electromyography. The nature of chondropathia patellae as an insertion tendopathy is discussed, taking the lack of concomitance of chondropathy and chondromalacia into consideration as well as the findings in the group of patients examined. Phenomena associated with chondropathy which have hitherto incongruous may be explained on the basis of an asymmetrical innervation disturbance.

Adolescent↗
PubMedDate not supplied

[Visco-elasticity and cell volume density of the patellar cartilage].

The elasticity of the joint surface was measured at defined points on a freshly removed patella which had no macroscopically apparent degenerative changes. The chondrocyte volume density of the stressed points was determined planimetrically. A correlation was found between the cell volume density and the viscoelastic properties of the joint cartilage, indicative of an increase in elasticity where the cell volume density was reduced. The mean chondrocyte volume under a defined joint surface was found to be almost constant, with varying cartilage thickness.

Cartilage, Articular↗
PubMedDate not supplied

[Rotator syndrome of the shoulder and mobility of the cervical spine].

"Painful shoulder" results from different pathogenetic disorders. There is a coincidence of cervical spine and shoulder syndromes. However, a deficit exists of reproducible proof correlation. In this study the motility of cervical spine in patients with painful shoulder syndromes is biometrically measured and compared with control persons. 41 patients and 94 healthy persons had been investigated. Radiograms of the cervical spine had been taken in spontaneous position, in maximal flexion and extension positions. The radiograms had been digitalized according to the technique of Arlen. In addition, vertebral gliding had been analyzed. There was no difference in spontaneous posture of the cervical spine. In patients the total motility was reduced. Regarding the single segments there was less motility in C4/5, C5/6, and C6/7. The physiologic vertebral gliding was diminished in C2/3 and C5/6. The correlation between reduced motility of cervical spine and shoulder pain can be explained by the following ways: 1. Interactions by posture 2. Disorders of muscular balance by nerve root lesions 3. Disturbance of muscle coordination by reflectoric afferences from cervical or shoulder regions. These results demonstrate the complexity of apparently local disorders of the shoulder.

Adult↗
PubMedDate not supplied

[Influence of axial deformities on the LDH isoenzyme of cartilage and synovial membrane in gonarthrosis].

Varus or valgus deformities and metabolic alterations of the articular cartilage and synovialis of patients with gonarthrosis (n = 67) had been analysed. The increase of axial deviation went together with a significant change of the LDH-activity of the cartilage. The increasing activity of the LDHH-subunits depending on the axial deviation corresponded exactly with the maximum stress on the articular surface calculated by Maquet. On the other hand alterations of the LDH isoenzyme distribution of the synovialis could be found with increasing activity of the LDHM subunits. A close correlation of the whole joint metabolism and the hypercompression of the cartilage is obvious.

Aged↗