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Biomedical subjects

J Dimnet

Publications and source records attributed to J Dimnet.

24 records · Page 2Linked to original sources
PubMedDate not supplied

Modeling the moving skeleton of walking subjects.

The proposed study consists in moving several bones such as pelvis, femur and tibia in conditions as similar as possible to those obtained in a walking subject, to evidence the functioning of this hip and knee joints. The analysis is performed during the stance phase when the joints are loaded. This study is the first phase of a research consisting in: (i) the visualization of the motion of joints in both normal and pathologic subjects; and (ii) the calculation in real time of articular loading caused by muscular forces when sustaining both the external and inertial loads. This research will provide the kinematic and dynamic boundary conditions applied to both a knee and a hip prosthesis of the patient in movement.

Arthrography↗
PubMedDate not supplied

Potential excursion and relative tension of muscles in the shoulder girdle: relevance to tendon transfers.

Muscles used for transfer ought to have adequate structural properties. The purpose of this study was to provide a database of potential excursion (muscle excursion without reference to connective tissue restraints) and relative tension (muscle physiologic cross-sectional area in percentage among a group) in shoulder girdle muscles. Thirteen muscles in 13 human cadavers aged 17 to 89 years at death were studied. Potential excursion ranged from 6.7 cm (supraspinatus) to 33. 9 cm (latissimus dorsi). Relative tension ranged from 1.7% (levator scapulae) to 20.9% (deltoid). Significant discrepancies were found between the properties of some of the muscles used as transfers around the shoulder and the properties of the muscles for which they are commonly used as substitutes. Despite the limitations of cadaveric studies and the fact that many other factors are involved in muscle transfers, this database of structural properties of shoulder girdle muscles may help when planning tendon transfers around the shoulder.

Adolescent↗
PubMedDate not supplied

Reciprocal angulation of vertebral bodies in a sagittal plane: approach to references for the evaluation of kyphosis and lordosis.

In order to establish a sagittal plane curve reference table for standing subjects examined laterally, we determined an easily reproducible standard posture. A sample of 100 healthy subjects from 20 to 29 years of age, was chosen (43 women, 57 men). The reciprocal angulations of each vertebral body in relation to the others were fed into a digitalizer and studied by computer. The study particularly concerns maximum kyphosis, maximum lordosis, sacral base slopes, and the tilt of intermediate vertebral bodies. The dispersion of the results is remarkably wide and, within the extreme values, the distribution is irregular. Individual correlations of these values are often dispersed, but spinal morphotypology. For considerable lengths, average values cannot be used as norms, given the wide span of values. Only the extreme limits are useful for the appreciation of curves as excessive, insufficient, or inverted.

Adult↗