Ossifications in the caudal attachments of the ligamentum flavum were studied on 121 dried thoracic spines. Most of them were aged. Frequency increased in a caudal direction. At T12, frequency depended on the orientation of the zygapophyseal joints of T11-12 which determined the range of rotation. When they were of thoracic orientation, allowing large range… (More)
The deformations and stresses acting on the acetabular rim have not been very precisely documented. The authors present a study based on an experimental simulation of hip loading with anatomic correlations. 122 dissections were performed in order to define the anatomic aspect of the roof (and especially of Byers's "area 17") and the intermediate area… (More)
The ligaments of the ankle are superficial and easily accessible at ultrasonography. Surprisingly, the reliability of this technique has never been proven. With this goal in mind, ten ankles were subjected to a ultrasono-anatomic comparison. The five principle ligamentous fascicles (three on the lateral side and two on the medial side) measured at… (More)
The authors describe the distribution of the medial branches of the upper thoracic dorsal rami (T1 to T5 levels). At each level, after travelling through the erector spinae, they become superficial, and reach the apex of the spinous process of the corresponding vertebra. They then spread out laterally, innervating the skin. They can occasionally be… (More)
The authors report a series of 41 dissections of the forearm intended to study the orientation of the fibers of the flexor carpi radialis (FCR). This shows that there is a constant torsion of the fibers of the FCR by an average of 180 degrees. Half of this torsion occurs in the forearm and half in the sheath of the FCR at wrist level. Awareness of this… (More)
This anatomic study is based on 50 adult cadaver upper extremities. The general disposition of the forearm arteries and muscles and the main anatomic variations encountered are specified. Constant existence of an "anterior oblique artery" satellite of the pronator teres was established. The median nerve artery was principally dedicated to the flexor… (More)
Colles' fractures with important displacement are accompanied by a subdislocation of the carpus backwards. The authors describe a radio-lunate sagittal index that measures the posterior displacement. This index should be instored during the reduction of the fracture.
The metacarporetinacular fascicle, the fourth fascicle of the medial collateral metacarpotrapezial ligament, was examined in 25 anatomic specimens. It contributes to stability of the ligament and plays an important role in the pronosupination of the thumb. This role becomes determinate when the geometry of the articular surfaces is disturbed.