Post on 31-Mar-2015
transcript
BIOMECHANICS OF THE SHOULDER
COMPLEX
SternumClavicula
Scapula
Humerus
Glenohumeralis
Acromioclavicularis Sternoclavicularis
Scapulothoracalis
GLENOHUMERAL JOINT
1/3 - 1/4
Diameter: 37- 55 mm Diameter: 41 mm
25 mm
Angle of inclination
Angle of torsion 30°
Synovial sheath
Glenoid cavity
When the arm is at rest at the side, the large capsule is taut superiorly and lax inferiorly
Greater tuberosity
FRONTAL PLANE
SAGITTAL PLANESCAPULLAR PLANE
30 - 45 degrees
: The labrum broadens and makes deeper the glenoid socket (top image). The labrum also acts as an anchoring point for the ligaments of the shoulder (lower image).
The normal main ligament of the shoulder (inferior glenohumeral ligament) supports the humeral head like a hammock supports a person (top image). With arm rotation, the ligament (hammock) moves forward and backward to keep the ball in the socket during this rotation (lower image).
Arm elevation
Flexion
Abduction
Flexion and abduction
Extension
Horizontal plane
30-45°120-135°
15-30°90°
135
45
Flexion and extension in horizontal plane
extension
flexion
Flexion-extension
100-120 degrees30 degrees
Sagittal plane
Extension Flexion
Abduction - adduction
90-110°
Távolítás
Gördülés
60°
Befelé fordítás Neutrális és lapocka sík
Gördülés
Távolítás
Passzív
Távolítás
75o
40o sternoclavicularis20o acromioclavicularis
Frontal plane
120o glenohumeral
Abduction
90 - 120o 135o
90o active
120o passive
TÁVOLÍTÁSABDUCTION
ROLLING SLIDING
activeactive passivepassive
Rotáció
50° 120 °
70° 50°
30° 20°
Kifelé Befelé
Throwing arm Contralateral
0
20
40
60
80
100
120
1 2 3 4 5 6 7 8 9 10
Fok
Kifelé Befelé
0
20
40
60
80
100
120
1 2 3 4 5 6 7 8 9 10
Fok
Kifelé Befelé
Herrington 1988
External and internal rotation
SCAPULOTHORACIC JOINT
Depression
ElevationTipping of the scapula
Közelítés -távolítás
Winging of the scapula
Downward rotation Upward rotation
0-30°30-60°
60-90°
90-120°
120-150°
Centre of rotation of scapula during abduction
MOVEMENT IN STERNOCLAVICULAR AND ACROMIOCLAVICULAR JOINTS
CENTRE OF ROTATION
30°30°
MOVEMENT IN SCAPOLOTHRACIC AND GLENOHUMERALIS JOINTS
ACROMIOCLAVICULAR JOINT
Scapular rotation: protraction-retraction
Scapular rotation around transverse axis
60°
30°
Scapular rotation in sagittal plane: elevation-depression
30°
60°
30°
30°
Scapula forgás előre - hátra
Scapula forgás a transverzális tengely körül
Scapula forgás oldal síkban: emelkedés - süllyedés
STERNOCLAVICULARIS IZÜLET
15 °
45 / 15 °
30 - 45 °Rotation about the longitudinal axis
Movement in sternoclavicularis joint
Elevation and depression
Anterior – psoterior movement
Az egyes izmok bekapcsolódása a munkavégzésbe
2005. 04. 13.
Az egyes izmok bekapcsolódása a munkavégzésbe
0.05 Bw
0.3 m
0.03 m
0.6 m
0.075 Bw
Fc = Fp sin
Winging of the scapula
Tipping of the scapula