Electromyographic Investigation of Hypnotic Arm Levitation: Differences Between Voluntary Arm Elevation and Involuntary Arm Levitation

2011 ◽  
Vol 60 (1) ◽  
pp. 88-110 ◽  
Author(s):  
Burkhard Peter ◽  
Philipp Schiebler ◽  
Christoph Piesbergen ◽  
Maria Hagl
Keyword(s):  
Arm Elevation ◽  
Electromyographic Investigation

Some Aspects of Lumbrical Function

1988 ◽  
Vol 13 (1) ◽  
pp. 54-59
Author(s):  
N. CITRON ◽  
A. FOSTER
Keyword(s):  
Flexor Digitorum Profundus ◽  
Flexor Digitorum ◽  
Electromyographic Investigation

An electromyographic investigation was performed on the hands of six volunteers. The functioning of the lumbrical and flexor digitorum profundus muscles during resisted and unresisted extension was studied. No subject showed much simultaneous contraction of the two muscles in unresisted extension of the interphalangeal joints, but some showed marked simultaneous contraction during resisted extension. We suggest that, in these individuals, the profundus is acting to steady the origin of the lumbrical so that it can act more efficiently.

Initiation of Electromyographic Activity in Fast Forward Arm Elevation

Motor Control ◽  
1987 ◽  
pp. 111-116
Author(s):  
P. Gatev ◽  
G. N. Gantchev ◽  
R. Koedjikova ◽  
B. Dimitrov
Keyword(s):  
Electromyographic Activity ◽  
Arm Elevation

scholarly journals Characteristic Movement of the Ribs, Thoracic Vertebrae while Elevating the Upper Limbs - Influences of Age and Gender on Movements

2019 ◽  
Vol 13 (1) ◽  
pp. 170-176
Author(s):  
Hisayoshi Tachihara ◽  
Junichiro Hamada
Keyword(s):  
Young Group ◽  
Thoracic Vertebrae ◽  
Middle Aged ◽  
Age And Gender ◽  
Aged Group ◽  
Age Related ◽  
Significant Difference ◽  
Shoulder Disorders ◽  
Arm Elevation ◽  
And Gender

Background: The rib cage, such as the thoracic spine and ribs, influences glenohumeral mobility and the development of shoulder disorders. Objective: To evaluate movements of the ribs, thoracic vertebrae during bilateral arm elevation and to clarify the characteristic influences of age and gender. Methods: Subjects comprised 33 healthy individuals divided into a young group (10 males, 7 females; mean age, 25 years) and a middle-aged group (8 males, 8 females; mean age, 52 years). Chest CT was performed with two arm positions: arms hanging downwards; and arms elevated at 160°. Images were three-dimensionally reconstructed to evaluate rib movement, extension angle of thoracic vertebrae. Results: Maximal movement was observed at the fifth rib, and rib movement decreased with increasing distance from the fifth rib in both the groups. In males, movement of the second to fourth ribs was smaller in the middle-aged group than in the young group (p < 0.05). Movement of the first to ninth ribs was smaller in females than in males (p < 0.05). No significant difference in the extension angle of the thoracic vertebrae was found. Conclusion: Fifth rib movement is the largest among all ribs during bilateral arm elevation. Reduction of upper rib movement initially arises as an age-related degradation in males. Women exhibit less rib movement during bilateral arm elevation.

BIOMECHANICAL MODEL PREDICTING VALUES OF MUSCLE FORCES IN THE SHOULDER GIRDLE DURING ARM ELEVATION

2010 ◽  
Vol 10 (04) ◽  
pp. 643-666 ◽  
Author(s):  
ERIC BERTHONNAUD ◽  
MELISSA MORROW ◽  
GUILLAUME HERZBERG ◽  
KAI-NAN AN ◽  
JOANNES DIMNET
Keyword(s):  
Geometric Modeling ◽  
Geometric Model ◽  
Contractile Element ◽  
Muscle Forces ◽  
Active Muscle ◽  
Cross Sectional ◽  
Shoulder Complex ◽  
Arm Elevation

A three-dimensional (3D) geometric model for predicting muscle forces in the shoulder complex is proposed. The model was applied throughout the range of arm elevation in the scapular plan. In vitro testing has been performed on 13 cadaveric shoulders. The objectives were to determine homogeneous values of physiological parameters of shoulder muscles and to locate sites of muscular attachment to any bone of the shoulder complex. Muscular fiber lengths, lengths of contractile element (CE), and muscle volumes were measured, corresponding physiological cross-sectional area (PCSA) were calculated, and force/length muscle relations were found. An in vivo biplanar radiography was performed on five volunteers. The photogrammetric reconstruction of bone axes and landmarks were coupled with a geometric modeling of bones and muscle sites of attachment. Muscular paths were drawn and changes in lengths during movement have been estimated. Directions of muscle forces are the same as that of muscular path at the point of attachment to bone. Magnitudes of muscular forces were found from muscle lengths coupled with force/length relations. Passive forces were directly determined contrary to active muscle forces. A resulting active muscle force is calculated from balancing weight and passive forces at each articular center. Active muscle forces were calculated by distributing the resulting force among active muscles based on the muscular PCSA values.

Scapular Kinematics and Subacromial-Impingement Syndrome: A Meta-Analysis

2012 ◽  
Vol 21 (4) ◽  
pp. 354-370 ◽  
Author(s):  
Mark K. Timmons ◽  
Chuck A. Thigpen ◽  
Amee L. Seitz ◽  
Andrew R. Karduna ◽  
Brent L. Arnold ◽  
...  
Keyword(s):  
General Population ◽  
Evidence Synthesis ◽  
Impingement Syndrome ◽  
Subacromial Impingement Syndrome ◽  
Lead Author ◽  
Future Research ◽  
Scapular Kinematics ◽  
Arm Elevation ◽  
The Impact ◽  
Scapular Plane

Context:The literature does not present a consistent pattern of altered scapular kinematics in patients with shoulder-impingement syndrome (SIS).Objectives:To perform meta-analyses of published comparative studies to determine the consistent differences in scapular kinematics between subjects with SIS and controls. In addition, the purpose was to analyze factors of the data-collection methods to explain the inconsistencies in reported kinematics. The results of this study will help guide future research and enable our understanding of the relationship between scapular kinematics and SIS.Evidence Acquisition:A search identified 65 studies; 9 papers met inclusion criteria. Sample sizes, means, and SDs of 5 scapular-kinematic variables were extracted or obtained from each paper’s lead author. Standard difference in the mean between SIS and controls was calculated. Moderator variables were plane of arm elevation, level of arm elevation (ARM) and population (POP).Evidence Synthesis:Overall, the SIS group had less scapular upward rotation (UR) and external rotation (ER) and greater clavicular elevation (ELE) and retraction (RET) but no differences in scapular posterior tilt (PT). In the frontal plane, SIS subjects showed greater PT and ER, and in the scapular plane, less UR and ER and greater ELE and RET. There was also greater ELE and RET in the sagittal plane. There was less UR at the low ARM and greater ELE and RET at the high ARM with SIS. Athletes and overhead workers showed less UR, while athletes showed greater PT and workers showed less PT and ER. The general population with SIS had greater ELE and RET only.Conclusions:Subjects with SIS demonstrated altered scapular kinematics, and these differences are influenced by the plane, ARM, and POP. Athletes and overhead workers have a different pattern of scapular kinematics than the general population. The scapular plane is most likely to demonstrate altered kinematics. These factors should be considered when designing futures studies to assess the impact of altered kinematics in patients with SIS.

Sign in / Sign up

Export Citation Format

Share Document