Schwerpunkt Combined Movements in der LWS

2018 ◽  
Keyword(s):  
Combined Movements

Tectonique synsedimentaire d'age cretace superieur en Tunisie nord orientale; blocs bascules et reorganisation des aires de subsidence

2000 ◽  
Vol 171 (4) ◽  
pp. 431-440 ◽  
Author(s):  
Lahcen Boutib ◽  
Fetheddine Melki ◽  
Fouad Zargouni
Keyword(s):  
Structural Analysis ◽  
Upper Cretaceous ◽  
Tectonic Activity ◽  
Normal Faults ◽  
Half Graben ◽  
Combined Movements ◽  
Basin Floor ◽  
Tunisian Atlas ◽  
Facies Variation ◽  
Regional Tectonics

Abstract Structural analysis of late Cretaceous sequences from the northeastern Tunisian Atlas, led to conclude on an active basin floor instability. Regional tectonics resulted in tilted blocks with a subsidence reorganization, since the Campanian time. These structural movements are controlled both by N140 and N100-120 trending faults. The Turonian-Coniacian and Santonian sequences display lateral thickness and facies variation, due to tectonic activity at that time. During Campanian-Maastrichtian, a reorganization of the main subsidence areas occurred, the early Senonian basins, have been sealed and closed and new half graben basins developed on area which constituted previously palaeohigh structures. These syndepositional deformations are characterized by frequent slumps, synsedimentary tilting materials, sealed normal faults and progressive low angle unconformities. These tilted blocks combined to a subsidence axis migration were induced by a NE-SW trending extensional regime. This extension which affects the Tunisian margin during the Upper Cretaceous, is related to the Tethyan and Mesogean rifting phase which resulted from the combined movements of the African and European plates.

scholarly journals IV. Note on the excitation of the surface of the cerebral hemispheres by induced currents

1874 ◽  
Vol 22 (148-155) ◽  
pp. 368-370 ◽  
Keyword(s):  
Royal Society ◽  
Copper Wire ◽  
The Body ◽  
Secondary Coil ◽  
Living Tissue ◽  
Primary Coil ◽  
Accurate Definition ◽  
Combined Movements ◽  
Induced Currents ◽  
The Brain

In a paper recently communicated to the Royal Society by Dr. Ferrier (Proceedings, No. 151) it is shown that when two ends of copper wire distant from each other not more than a couple of millimetres, and in metallic communication with the terminals of the secondary coil of a Du Bois’s induction-apparatus in action, are applied to certain spots of the surface of either hemisphere, and great intensity is given to the induced currents thereby directed through the living tissue, by previously bringing the secondary coil into such a position that it is very close to the primary coil or even partially covers it, characteristic combined movements of the opposite side of the body are produced. With reference to these effects, it was observed by Dr. Ferrier (1) that excitation of the same spot always produces the same movement in the same animal, (2) that the area of excitability for any given movement (or, as it may be called for shortness, active spot ) is extremely small and admits of very accurate definition, and (3) that in different animals excitations of anatomically corresponding spots produce similar or corresponding results. From these remarkable facts and from others similar to them relating to other parts of the brain to which I do not now advert, it was inferred that, at the surface of the hemispheres, certain “centres” are to be found, of which it is the function to originate combined or even purposive movements.

scholarly journals In Vitro Upper Cervical Spine Kinematics: Rotation with Combined Movements and its Variation After Alar Ligament Transection

2021 ◽  
pp. 110872
Author(s):  
Ana I. LORENTE ◽  
César HIDALGO-GARCÍA ◽  
Pablo FANLO-MAZAS ◽  
Jacobo RODRÍGUEZ-SANZ ◽  
Carlos LÓPEZ-de-CELIS ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Upper Cervical Spine ◽  
Alar Ligament ◽  
Spine Kinematics ◽  
Upper Cervical ◽  
Combined Movements

Analysis of the pedestrian traffic in transport nodes in Radom

2020 ◽  
Author(s):  
Marzenna Dębowska-Mróz ◽  
Ewa Ferensztajn-Galardos ◽  
Renata Krajewska ◽  
Andrzej Rogowski
Keyword(s):  
Transport System ◽  
Public Transport ◽  
Traffic Congestion ◽  
Public Transport System ◽  
Combined Movements ◽  
Pedestrian Traffic ◽  
Pedestrian Travel ◽  
A Chain ◽  
The City ◽  
City Centres

The efficient functioning of the transport system in each area requires that account be taken of the fact that each journey consists of a chain of elementary movements on foot or by means of trans­port. The construction of an effective public transport system is one of the methods to reduce traffic congestion, especially in city centres. The inter-change synchronization is the way to increase the efficiency of public transport. The purpose of the paper is to present the results of research on the intensity of pedestrian traffic at interchanges as a function of time in the city of Radom. Pedestrian movements play an important role not only in the vicinity of transport nodes. Their production and quality also determine the assessment of these movements as one of the stages of production of combined movements. The tendency to pedestrian travel (or lack of it) also affects public and individual transport journeys. Based on the survey conducted in households, the structure of movement (size and motivations) of the inhabitants of Radom is given.

The Central Nervous Control of Complex Movements in the Uropods of Crayfish

1969 ◽  
Vol 51 (1) ◽  
pp. 135-150
Author(s):  
J. L. LARIMER ◽  
D. KENNEDY
Keyword(s):  
Central Element ◽  
Simultaneous Recording ◽  
Motor Output ◽  
Afferent Feedback ◽  
Rhythmic Pattern ◽  
Nervous Control ◽  
Motor Pathways ◽  
Combined Movements ◽  
Motor Neurones ◽  
Two Sides

1. The control of postural uropod muscles in the crayfish has been investigated by stimulating ‘command’ interneurones isolated from central connectives. Reciprocity is preserved between exciters and inhibitors innervating the same muscle, and between motor axons serving antagonists. 2. The control of combined movements, involving groups of muscles that are neither synergists nor antagonists, was analysed by simultaneous recording. Most command fibres affected several different motor pathways, and different command fibres produced different combinations of output. It is concluded that quite complex movements may be encoded in the connexions of a single central element. 3. In several instances it was shown unequivocally that single central neurones were responsible for releasing the motor output. One identified command neurone produces a stereotyped, rhythmic pattern of activity in several motor pathways. This effect did not depend upon afferent feedback for its form or frequency. 4. Command interneurones often produce asymmetrical responses in the appendages of the two sides. Some of these make connexions only to the ipsilateral motor neurones, others only to contralateral ones, and most make differential connexions on the two sides.

scholarly journals Effects of Daily Activities and Position on Kinematics and Contact Mechanics of Dual Mobility Hip Implant

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Yongchang Gao ◽  
Xin Zhao ◽  
Shibin Chen ◽  
Jing Zhang ◽  
Zhenxian Chen ◽  
...  
Keyword(s):  
Contact Mechanics ◽  
Large Range ◽  
Stair Climbing ◽  
Daily Activities ◽  
Hip Implants ◽  
Potential Influence ◽  
Anteversion Angle ◽  
Dual Mobility ◽  
Dynamic Finite Element ◽  
Combined Movements

Dual mobility hip implants have been widely introduced to overcome dislocation in recent years. However, the potential influence of different gaits on kinematics and contact mechanics for dual mobility hip implants is still unclear. Furthermore, a large range of motion coupling with the implant position, especially high inclination or anteversion angle, may result in poor kinematics and contact mechanics. A previously developed dynamic finite element method was adopted in this study to examine the kinematics and corresponding stability of dual mobility hip implants under different gaits coupling with different inclinations or anteversion angles. The results showed only inner relative sliding under knee-bending for dual mobility hip implants under moderate inclination and anteversion angles, whereas an anteversion angle of 25° induced both impingement and consequent relative sliding of the outer articulation. However, the impingement (between the stem neck and the liner inner rim) indeed happened under stair-climbing and sitting-down/stand-up as well as combined movements when inclination and anteversion angles were set as 45° and 0°, respectively, and this finally led to relative sliding at the outer articulation. A high inclination angle did not worsen both the impingement and related outer sliding compared to modest inclination and anteversion angles of the liner, but a high anteversion angle prolonged the period of both the impingement and the outer relative sliding. The extreme motions and high anteversion angles are hardly inevitable, and they indeed lead to motions at both articulations for dual mobility hip implants.

Head Movement Evoked By Electrical Stimulation in the Supplementary Eye Field of the Rhesus Monkey

2005 ◽  
Vol 94 (6) ◽  
pp. 4502-4519 ◽  
Author(s):  
L. Longtang Chen ◽  
Mark M. G. Walton
Keyword(s):  
Head Movement ◽  
Direct Evidence ◽  
Head Movements ◽  
Eye Position ◽  
Low Velocity ◽  
Gaze Shifts ◽  
The Gaze ◽  
Supplementary Eye Field ◽  
Combined Movements ◽  
Eye Field

Although the supplementary eye field (SEF) has been implicated in the control of head movements associated with gaze shifts, there is no direct evidence that SEF plays a role in the generation of head movements independent of gaze. If the SEF does, varying the duration of stimulation should selectively alter the head-movement kinematics during the postgaze-shift period. The duration of the stimulation was manipulated while head-unrestrained monkeys maintained stable head forward postures. The initial positions of the eyes in the orbits were systematically varied. Although combined movements of the eyes and head were produced in the majority of the trials, head movements were sometimes evoked in the absence of gaze shifts. These head-alone movements were most frequent when the initial eye position was contralateral to the stimulated side. When the stimulation produced eye and head movements, gaze onset was sometimes preceded by a relatively low-velocity phase of the head movement. Evoked head movements were primarily horizontal, unlike the gaze shifts, which typically had vertical components that varied according to the initial positions of the eyes in the orbits. The postgaze-shift head movements tended to be of low velocity and in many cases persisted until stimulation offset. In general, prolonging the stimulation resulted in improved centering of the eyes in the orbits. These findings suggest that, in addition to its previously described role in the generation of coordinated eye-head gaze shifts, the SEF is also involved in the control of head movements in the absence of a change of gaze.

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