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H Mestdagh

Publications and source records attributed to H Mestdagh.

At least 109 records · Page 6Linked to original sources
PubMed1980

[Anatomy of the arcus volaris profundus of man (author's transl)].

The deep volar arch presents few deviations from the so-called normal arrangement in: Keen's (1961) general survey of the arterial variations of the limbs, no abnormality of the arcus volaris profundus (AVP) is reported even if a fairly rate ruperficial dorsal radial artery is found (1 both sided in our series of 50 specimens). The deep palmar branch may arise from the ulnar artery, either above, or below the hook of the hamate; contrary to Coleman and Anson's (1961) findings, we considered that both vessels rarely join the radial artery together. 3 recurrent twigs were usually encountered running upwards along the carpal interspaces of the 2nd row; they contribute to the arterial carpal network around the capitate and may reach the tubercle of the scaphoid or the triquetrum. On the contrary the arch provided no nutrient vessel for the lunate which was merely supplied by branches descending from the radial and interosseous arteries. Hence no compensatory supply is to be expected through the rete carpi volare once the chief arterial trunks of the forearm are interrupted.

Arteries↗
PubMed1979

The dorsal arterial network of the wrist with reference to the blood supply of the carpal bones.

The gross examination of 50 minium injected specimens showed us the various patterns of the posterior arterial network of the wrist. This is chiefly provided by the radial artery which gives off a constant dorsal carpal branch over the posterior aspect of the trapezium. This vessel crosses the carpus transversely to the inner border of the hand and is joined in half of the cases by the interosseous artery; contribution of the posterior carpal branch of the ulnar artery was more rarely found than usually described (25%). From the arch thus formed are given off short branches which run upwards along the intercarpal joints and enter the posterior aspects of the proximal carpal bones whose lower halves seem to be the most favorably supplied. On the contrary, the distal carpal bones receive several short twigs which penetrate their posterior surfaces. Although the arrangement of the pedicles may undergo many a variation, attention must be drawn to the fact that the dorsal arteries are smaller but denser than the volar, except for the hamate. Therefore 2 different patterns of arterial supply can be described at the carpus: the blood supply of the outer and axial bones--scaphoid, trapezium, lunate, capitate--derives from the radial and the interosseous arteries and is probably shared equally by volar and dorsal branches; the inner bones--triquetrum, hamate--are primarily supplied by volar or medial branches coming almost exclusively from the ulnar artery.

Adult↗
PubMed1976

[Morphologic anatomy of the interjugochiasmatic fenestra].

The pituitary body can be surgically approached through the triangular cleft limited by the sphenoidal jugum and the anterior side of the optic chiasma. The mean surface was calculated by measurements on 51 specimens; it reached 65 mm2. The ratio height : width of the cleft attained 1,3-1,4 corresponding to an anterior chiasmatic angle of about 66-70 degrees. With regard to the variations of the intermalar distance, the values of the triangular surface could be classified into 3 types:--to a distance of 100 mm corresponds a surface less than 50 mm2 (narrow or first grade);--to a distance of 115 mm corresponds a surface greater than 80 mm2 (wide or third grade);--Between these values, the surface can be reckoned on a grossly parabolic curve, the top of which amounts to 90 mm when the intermalar distance equals 107 mm.

Humans↗
PubMed1976

Morphological aspects and biomechanical properties of the vertebroaxial joint (C2-C3).

The C2-C3 intervertebral joint must be regarded as a transitional area situated between the upper cervical spine where most rotation of the neck and little flexion and extension occur and the lower cervical spaces where chiefly motion in the sagittal plane and also somewhat rotation take place. Under normal circumstances the range of flexion-extension reaches 11 degrees, slighter than below (19.5 degrees at C5-C6); on the opposite, the range of rotation attains 7 degrees; less than above but much more than below (0 degrees at C5-C6). The motion in the sagittal and coronal planes is relatively poor because of the location of Penning's motor-axis of C2 which runs far from the vertebral body and the lowness of the intervertebral disc. However, the rotation of C2 with respect to C3 is fair by the peculiar inclination of the articular facets which slope sagittally but also coronally and trace a sphere whereupon C2 may move around its motor-centre in any plane. When C2-C3 is surgically fixed by bone graft, the lack of motion is completed by a "compensatory movement" in the upper cervical spaces and especially at the atlantooccipital joint for flexion-extension. In the same way, C2-C3 may improve its mobility especially in the sagittal plane when the inferior partner is blocked by surgical or arthritic fusion.

Axis, Cervical Vertebra↗
PubMed1976

[Comparative morphology of the trabecula septomarginalis in terrestrial mammals].

The authors studied macroscopic morphology and histologic structure of the moderator band - trabecula septomarginalis - in 100 earthly mammals. A real trabecula septomarginalis was never found in carnivora (dog and fox) because the "anterior" papillary muscle of the right ventricle is located on the lower part of the septum ventriculorum or at times bridge-shaped above the anteiror interventricular groove and attached on both septum and anterior wall of the right ventricle. On the opposite, in ungulates, a well-known band runs across the right ventricular chamber from the septum close to the musculus papillaris coni arteriosi up to the anterior wall close to the anterior papillary muscle. In fact the attachments lie more or less approximate to the pillars; in suidae, the trabecula usually ends on a vertical trabecula carnea just under Luschka's muscle. Three types of trabecula septomarginalis were encountered as previously described by Bortolami in ox: - Mostly (66%), the trabecula septomarginalis is a short and thick fleshy column. The ratio Length mm Thickness mm amounts to about 4 to 7 and can be regarded as reasonably constant within each variety. Moreover the quotients Length mm Height of septum MM. and Thickness of the trabecula mm Highest thickness of the anterior wall mm (measured just beneath the tricuspid attachment) keep constant in each group; thus it may be concluded that size and shape of the trabecula depend on the volume of the heart and the age of the animal. - Rarely, the trabecula looks like a tendinous cord. Such a fibrous string is nearly constant in suidae, especially in wild boar, but seldom in bovidae and cervidae. In all cases, the trabecula septomarginalis supports the right branch of the atrioventricular bundle and a thin artery which originates from the left coronary artery and branches into the right coronary vessels within the anterior papillary muscle. Some venous capillaries were also observed but only in the muscular trabeculae; they are not constant and mouth into the right ventricular chamber or run towards the septal veins around the atrioventricular node. Therefore whatever is the size, the trabecula septomarginalis must be regarded as the shortest pathway from the septum to the anteiror wall of the right ventricle and is a mere band bearing the "right nodal pedicle".

Animals↗
PubMed1975

[Neuroskeletal radiography and relationships of the sensitive branch of the radial nerve].

The authors carried out an anatomical, roentgenological and surgical study of the ramus superficialis of the radial nerve in man. This branch springs down 1,2 cm. below the humeroradial space and crosses the posterior rim of brachioradialis 8 cm. above the tip of the radial processus styloideus. Twice the exceptional arteria antebrachialis dorsalis was found; the vessel and the radial nerve looked like a posterior pedicle at the forearm. Among the 3 ending branches, the middle one is the most vulnerable in lateral approach of radius and naviculare.

Fetus↗
PubMed1975

[Comparative anatomy of the arterial and venous vascularization of the septomarginal trabecula in man and mammals].

By means of naked-eyed dissections and microscopic examinations of the right ventricle in 71 mammals, the authors explained the contents of the trabecula septomarginalis. Besides the right branch of the atrioventricular bundle, they always observed a long artery running deeply from the left coronary artery to the anterior papillar muscle where it joins some right coronary vessels. A few various venous capillaries may be observed going to the anterior interventricular vein or mouthing into the right ventricular chamber (Thebesian veins).

Animals↗