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M Rooze

Publications and source records attributed to M Rooze.

At least 37 records · Page 2Linked to original sources
PubMed1999

The use of disharmonic motion curves in problems of the cervical spine.

Cervical spine motion was investigated by three-dimensional electrogoniometry in 257 asymptomatic volunteers and in 32 patients with cervical disc hernia or whiplash syndrome. Maximal ranges of main and coupled motions were considered. Motion curves were analysed qualitatively and using fitting of sixth degree polynomials. Motion ranges obtained were in agreement with previous observations. Significant differences between patients and volunteers concerned several primary and coupled components but not all. Qualitatively, patients displayed less harmonic curves, with irregularities and plateau-like appearances. Root mean square differences between data and fit were significantly modified in patients. Although cervical spine motion ranges may remain within normal limits in patients, motion patterns were altered qualitatively and quantitatively. Motion pattern analysis might prove a useful discrimination parameter in patients in whom anatomical lesions are not clearly identifiable.

Adolescent↗
PubMed1999

Three-dimensional motion patterns of the carpal bones: an in vivo study using three-dimensional computed tomography and clinical applications.

A three-dimensional (3D) CT technique was developed to analyze in vivo segmental carpal kinematics. Transverse CT data of the distal forearm, carpals and proximal metacarpals was acquired and 3D reconstructed in various wrist positions. Carpal kinematics were analyzed in two groups of 20 asymptomatic volunteers, one group in neutral position, flexion and extension (45 degrees), and the other group in neutral position, radial (15 degrees) and ulnar deviation (30 degrees). Qualitative analysis included the 3D study of carpal anatomy, and comparison of carpal bone position between the different sets of data obtained. Carpal bone motion was quantified using rigid body and finite helical axis concepts. The results, although agreeing in principle with previous findings, showed important individual variations in carpal bone motion. Clinical applications were conducted in a series of 25 patients with various wrist disorders. There was no significant difference between the injured wrist and the heterolateral, asymptomatic wrist, but there was a significant difference between asymptomatic volunteers and both the injured wrist and heterolateral wrist of patients. In particular, scaphoid motion was altered bilaterally in our patient group, suggesting the existence of anatomic and/or kinematic factors predisposing to certain carpal pathologies. This hypothesis needs to be confirmed and refined.

Adolescent↗
PubMed1999

Normal global motion of the cervical spine: an electrogoniometric study.

OBJECTIVE: Establishment of a normal database and clinical reference of active global cervical spine motion ranges and patterns using a commercial electrogoniometer. DESIGN: Three-dimensional cervical motion ranges and patterns were analyzed in 250 asymptomatic volunteers. BACKGROUND: In vivo out-of-plane motion patterns of the cervical spine have not yet been reported in large populations, but could be of clinical interest. METHODS: In 250 subjects (aged 14-70 yr), motion range and patterns between the first thoracic vertebra and the head were analyzed for flexion-extension, lateral bending, rotation in neutral sagittal plane position and in full flexion using the CA 6000 Spine Motion Analyzer. RESULTS AND CONCLUSIONS: Average motion range in the sagittal plane was 122 degrees (SD: 18 degrees ). Flexion was slightly more important than extension. Out-of-plane components were negligible. Global bending range averaged 88 degrees (SD: 16 degrees ), left and right bending being comparable. Homolateral rotation was associated to lateral bending. Its extent was approximately 40% of the bending range. Global rotation range in neutral sagittal plane position was 144 degrees (SD: 20 degrees ), without significant difference between right and left rotations. Associated motion components were small. During rotation in flexed head position, global range (134 degrees, SD: 24 degrees ) was comparable to the one in neutral flexion. But heterolateral bending, averaging 60% of the primary motion, was associated to flexed rotation. Significant reduction of all primary (but not conjunct) motions with age were obtained. Sex had no influence on cervical motion range. RELEVANCE: Our results agreed with previous observations, validating the methodology used. They thus constitute reference data of cervical out-of-plane motion for clinical applications.

Adolescent↗
PubMed1998

[Virtual laparoscopic anatomy of the esophagogastric junction].

The anatomy of the GE junction is represented by computer synthetised pictures. This method allows to represent different organs from different angles, emphasis being put on the laparoscopic angle of vision. This should improve anatomical comprehension. The synthetic pictures have been constructed in a figurative representation. Fatty tissues have been omitted whereas the peritoneal layers covering organs and defining spaces are enhanced.

Anatomy↗
PubMed1998

Effects of irradiation and methyl-triazene on craniofacial development in mouse embryos: a semiautomated morphometric analysis.

OBJECTIVE: The purpose of the present study was a 2D-semiautomated morphometric analysis of craniofacial growth in nuclear magnetic resonance imaged (NMRI) mouse embryos. METHODS: The NMRI mouse embryos were exposed in utero to either a single dose of 2 Gy X-irradiation on day 9 of gestation (113 embryos) or to 1.5 mg methyl-triazene administered orally to their pregnant mothers on gestational day 10.5 (124 embryos). An additional group of 108 embryos was used as controls. Digitized pictures of embryos from gestational days 14 to 17 were taken in lateral right view using a video system. Landmarks were located and digitized for computerized analysis of growth changes in relation to developmental stages of the face. RESULTS: The results revealed that the snout of control embryos lengthens during the developmental period considered. The snout of embryos previously submitted to methyl-triazene displayed micrognathia, and all treated fetuses exhibited macroscopic signs of microcephaly with a reduced mandible. The snouts of irradiated embryos appeared shortened at the 14-day stage and continued to shorten as development proceeded. A shortening of the midface was detected macroscopically in 83% of the cases. CONCLUSION: The results of this morphometric analysis enabled us to trace the developmental progression of the induced dysmorphosis and to assess the differences compared with normal development.

Abnormalities, Drug-Induced↗
PubMed1998

[The role of apoptosis during craniofacial development: concepts and importance in pathology].

Apoptosis is an essential common final pathway in numerous pathological conditions such as malignant tumors, HIV-related CD4 lymphocytes degeneration, neurodegenerative disorders, and in programmed cell death events during normal embryogenesis. Some teratogenic substances for man and laboratory mammals induce an increase of the apoptotic phenomenon, responsible for the occurrence of some precise cranio-maxillo-facial malformations. The study of cell death during normal or teratogenic embryonic development allows to analyse the cellular mechanisms implied in the control of the apoptotic phenomenon, together with its dysregulation ending in pathological processes. We review the cell death phenomenon during cephalogenesis, both during normal embryogenesis, or in teratogenic conditions known to induce cranio-maxillo-facial malformations.

Abnormalities, Drug-Induced↗
PubMed1998

Postero-anterior radiography of the wrist. Normal database of carpal measurements.

This study aims to establish a normal database of carpal postero-anterior radiographic measurements that might be a useful alternative to lateral film measurements in clinical practice. Selected landmarks were digitised on 80 postero-anterior wrist radiographs of asymptomatic volunteers. Carpal bone dimensions, ulnar variance, carpal height ratios, radial slope and various carpal angles were computed. Moreover, we describe two new parameters, the scapho-lunate ratios, that may prove useful in the diagnosis of carpal instability. Average values for carpal height, length of metacarpal III, capitate length, ulnar variance, radial slope and classical and revised carpal height ratios agreed with previous findings. Scaphoid length averaged 22 +/- 3 mm, lunate anterior and posterior horn lengths 11 +/- 1 mm and 16 +/- 2 mm respectively. Except for carpal height and length of metacarpal III, standard deviations did not exceed 3 mm. Some of the variation coefficients reached 30% of the average dimension, so that variations, compared to means were not negligible. The standard deviations of angular measurements ranged from 3 degrees to 13 degrees. Further investigations are needed to confirm the usefulness of scapho-lunate ratios.

Anthropometry↗
PubMed1997

High resolution magnetic resonance imaging application in anatomy: the extensor digitorum muscle insertion on the first phalanx.

Classical dissection may give unsatisfactory results because of the presence of artifacts due to both the embalming process and displacement of the anatomical structures. This spatial disturbance could explain the divergent descriptions found in the literature about the presence, or the absence, of an insertion of the extensor digitorum muscle (ED) at the first phalanx (P1). Preliminary experiments by Van Sint Jan et al. (1996) found the same contradiction: dissections did not show a real tendon attachment, whereas a functional experiment seemed to show that "something" should exist between ED and P1 to explain the results. This paper presents the results of an in vitro MRI study of this anatomical area. A 7-T NMR microscope was used to collect accurate, noninvasive data. Subsequently, surface rendering was performed to visualize the structures in a three-dimensional manner. The results of this MRI study, together with functional data obtained in an earlier study, showed that no real insertion of ED on P1 exists. However, some collagenic fibers were occasionally-observed running from the ventral aspect of ED to both P1 and the metacarpo-phalangeal joint capsule. Those few collagenic fibers would play a secondary role in the extension of P1.

Collagen↗
PubMed1997

The capsular ligaments of the wrist.

Variable descriptions and nomenclatures of the ligaments of the wrist can be found in the literature. To verify the multiple concepts advanced about this subject and to provide a basis for a better understanding of the individual variations of carpal biomechanics, and of the numerous pathomechanical concepts found in the literature, this study attempted to report the gross anatomy of the capsular carpal ligaments and their variations. Precise dissection of 66 anatomical preparations enabled to observe the origin, insertion, and number of fascicles of the capsular ligaments of the wrist. The anatomy of the capsular ligaments of the wrist displayed, besides relatively constant structures, considerable individual variations that concerned particularly the ulnocarpal and dorsal ligaments. A classification of the specimens according to variations in the important wrist ligaments has been advanced and has to be refined by a more extensive analysis. The possible influence of these variable configurations upon carpal biomechanics, diagnosis, classification and treatment of carpal pathologies seems conceivable but still has to be determined.

Cadaver↗
PubMed1997

Calretinin is transiently expressed in tendon fibroblasts of the paravertebral region of the chick embryo.

Although calretinin is an intracellular calcium acceptor protein essentially located in neurons, we have previously shown that calretinin was also expressed in the mesenchymal cells forming the intervertebral disc. Here, we describe, using immunohistochemistry, the transient expression of calretinin in fibroblasts responsible for the tendon formation in the paravertebral region. We have looked at chick embryos from embryonic day 4 to day 18. At embryonic day 6, calretinin immunoreactivity was detected in chick embryo cells located laterally to the spinal cord between two groups of developing muscular cells. At embryonic day 8, calretinin immunoreactivity intensity was the highest in cells showing a fibroblast morphology. After embryonic day 8, when fibroblast proliferation decreased and differentiation increased, calretinin immunoreactivity progressively disappeared. Interestingly, calretinin could not be detected in fibroblasts of the anterior and posterior limbs at any investigated age. Because calretinin expression appeared selectively and transiently in the fibroblasts of the paravertebral region, we may conclude that the phenotype of those fibroblasts is different from the limbs fibroblasts.

Animals↗
PubMed1997

Joint kinematics simulation from medical imaging data.

A method for joint kinematics simulation is described. Kinematics parameters are determined from the relative displacement of marker sets placed on anatomical landmarks of surface models generated from medical imaging contour data. The landmarks are identified manually on fingers in multiple positions. A mathematical algorithm was then used to ascertain the kinematics axes of motion of the fingers. Once these axes are located, they are used as the base of a real time interactive simulation of the finger. The entire simulation was accomplished in a high-resolution graphics environment. A full complement of interactive tools (virtual dials and buttons controlled via mouse) was used to enhance the user interface. The development of the system, the model and the advantages and disadvantages of the method are discussed.

Arthrography↗
PubMed1996

Moment arm length variations of selected muscles acting on talocrural and subtalar joints during movement: an in vitro study.

The tendon excursion method was applied to estimate the moment arm length of triceps surae, flexor hallucis longus, tibialis posterior, tibialis anterior, peroneus brevis and peroneus longus at talocrural and subtalar joints of 10 anatomical preparations. Orthogonal polynomials were fitted to the tendon excursion data and by derivation with respect to the joint angle, the instantaneous moment arm length for any joint position was evaluated. Both joints were investigated separately. Individual data, the mean moment arm together with the significant moment arm coefficients of the polynomials are presented. Considering their moment arm, the most important plantar flexor were triceps surae, flexor hallucis longus and to a much lesser extent peroneus longus, peroneus brevis and tibialis posterior. Results suggest a partially new insight into the muscle action at the subtalar joint. Although displaying a mean inversion moment arm of about -5.3 mm over the whole range of motion, triceps surae had an inversion moment arm in eversion and an eversion one in inversion. Tibialis posterior exhibited the most important inversion moment arm (-19.1 mm), whereas tibialis anterior had a very low one (-3.8 mm). For some specimens this muscle was found to have an eversion moment arm. Peronei longus and brevis had a nearly identical moment arm at the subtalar joint (21.8 and 20.5 mm).

Algorithms↗
PubMed1996

The insertion of the extensor digitorum tendon on the proximal phalanx.

Review of the literature reveals that the relationship between the extensor digitorum muscle tendon to the proximal phalanx and the metacarpophalangeal joint capsule remains unclear. The present study presents data about these relationships and consists of three parts: dissection of the region, high-gradient magnetic resonance imaging, and functional study. A total of 50 hands were used. Dissection was performed on 30, magnetic resonance studies were performed on 10, and the remaining 10 hands were used for the functional analysis. Dissection did not reveal an insertion of the extensor digitorum tendon on the base of the proximal phalanx. An extension of the dorsal part of the metacarpophalangeal joint capsule running proximally toward the palmar side of the extensor tendon was observed in eight hands. In the remaining 22 hands, only loose connective tissue was found between the articular capsule and the tendon. The development of this tissue was variable. These observations were correlated using a 7T magnetic resonance installation. The results of the functional study showed that hyperextension of the proximal phalanx increased after resection of the metacarpophalangeal structures lying under the extensor tendon. In conclusion, no real tendinous insertion of the extensor digitorum tendon on the base of the proximal phalanx could be found. Loose connective tissue was observed between the metacarpophalangeal joint capsule and the palmar aspect of the tendon, which seemed to play a secondary role in the extension of the proximal phalanx.

Biomechanical Phenomena↗
PubMed1995

The arcade of Fröhse: an anatomic study.

An anatomic study of the appearance and consistency of the upper arcade of the superficial layer of the supinator m. was carried out on 106 elbow-joint dissections. A classification of the structure was drawn up in order to discern the criteria for normality. An arcade of a tendinous nature ("arcade of Fröhse") was encountered in the majority of cases (64.1%). At first sight, it could not be ascribed a compressive role affecting the posterior branch of the radial n. Macroscopic examination of the nerve prior to its entry under the supinator arcade revealed the presence of macroscopic lesions in 42.9% of cases. This high incidence does not permit any conclusions regarding the pathologic significance of this type of lesion.

Elbow↗
PubMed1995

A topographical study of cartilaginous lesions to the elbow.

The macroscopic examination of 40 anatomical preparations of the elbow has enabled us to describe the location of cartilaginous lesions to the humeral, radial and ulnar joint surfaces. A protocol for the macroscopic examination of the lesions was drawn up for the observation of 40 anatomical elbow-joint preparations. The results demonstrated that the cartilage of the lateral compartment (humero-radial) was preferentially affected as compared with that of the medial compartment (humero-ulnar) for which it will be necessary to search for a functional explanation.

Aged↗
PubMed1994

Anatomical variations of the intrinsic muscles of the thumb.

The observation of thirty dissections of intrinsic muscles of the thumb provides some information differing from earlier anatomical studies. The abductor pollicis brevis and the opponens pollicis have been divided into muscles having six or two fascicles (or bellies), respectively. The adductor pollicis muscle has been separated into nine fascicles. Many variations were observed: absence of fascicles, presence of atrophied or supplementary fascicles, or fascicles with varying insertions sites. Neither head of the flexor pollicis brevis muscle seemed to have any fascicles. The distal insertion of its superficial head observed in this work is not in accordance with the usual description found in the literature. A new classification of the thenar muscles is presented based on the present observations. Many variations were observed: some fascicles were absent, others were supplementary or atrophied, and some had variable insertions. The importance and the individual variations of the fascicles are discussed.

Humans↗
PubMed1992

The thenar muscles. New findings.

Examination of the thenar muscles in 30 anatomical preparations of the hand have shown that the abductor pollicis brevis, the opponens pollicis, and the adductor pollicis muscles are made up of several muscle bellies. The number and insertions of these bellies are varied. Both heads of flexor pollicis brevis do not originate from any particular muscle belly. The superficial head of this muscle always inserted into the head of the thumb metacarpal, either completely, or, some of the fibres of the dorsal aponeurosis of the thumb were attached to the base of the proximal phalanx. Furthermore the anatomy of the abductor pollicis brevis muscle was related to the presence of a tendinous slip from abductor pollicis longus. These variations could have an influence on proprioception in the thumb ray.

Hand↗