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BIOMECHANICS OF

THE SHOULDERCOMPLEX

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SternumClavicula

Scapula

Humerus

Glenohumeralis

Acromioclavicularis Sternoclavicularis

Scapulothoracalis

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GLENOHUMERAL JOINT

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Angle ofinclination

Angle of torsion 30

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Greater tuberosity

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FRONTAL PLANE

SAGITTAL PLANESCAPULLAR PLANE

30 - 45 degrees

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: The labrum broadens and makes deeper the glenoid socket (top image).The labrum also acts as an anchoring point for the ligaments of theshoulder (lower image).

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The normal main ligament of the shoulder (inferior glenohumeral ligament) supports thehumeral 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 duringthis rotation (lower image).

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Horizontal plane

30-45120-135

15-3090

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135

45

Flexion and extension in horizontal plane

extension

flexion

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Flexion-extension

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Sagittal plane

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100-120 degrees30 degrees

Sagittal plane

Extension Flexion

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Abduction - adduction

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90-110

Tvolts

Grdls

60

Befel fordts Neutrlis slapocka sk

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Grdls

Tvolts

Passzv

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Tvolts

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75o

40o

sternoclavicularis

20o acromioclavicularis

Frontal plane

120o glenohumeral

Abduction

90 - 120o135o

90o active

120o passive

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TVOLTSABDUCTION

ROLLING SLIDING

active passive

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Rotci

50 120

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70 50

30 20

Kifel Befel

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Throwing arm Contralateral

Herrington 1988

External and internal rotation

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SCAPULOTHORACIC JOINT

Tipping of the scapula

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Depression

Elevationpp g o e sc pu

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Kzelts -tvolts

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Winging of the scapula

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g g p

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Downward rotation Upward rotation

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MOVEMENT IN STERNOCLAVICULAR

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MOVEMENT IN STERNOCLAVICULARAND ACROMIOCLAVICULAR JOINTS

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CENTRE OF ROTATION

30

30

MOVEMENT IN SCAPOLOTHRACIC

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MOVEMENT IN SCAPOLOTHRACICAND GLENOHUMERALIS JOINTS

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60

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60

30

30

Scapula forgs elre - htra

Scapula forgs a transverzlistengely krl

Scapula forgs oldal skban:emelkeds - sllyeds

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STERNOCLAVICULARIS IZLET

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STERNOCLAVICULARIS IZLET

Movement in sternoclavicularis joint

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15

45 / 15

30 - 45

Rotation about thelongitudinal axis

Movement in sternoclavicularis joint

Elevation and

depression

Anteriorpsoteriormovement

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Az egyes izmok bekapcsoldsa a

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Az egyes izmok bekapcsoldsa amunkavgzsbe

2005. 04. 13.

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Az egyes izmok bekapcsoldsa a

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Az egyes izmok bekapcsoldsa amunkavgzsbe

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0 03

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0.05 Bw

0.3 m

0.03 m

0.6 m

0.075 BwFc = Fp sin

Winging of the scapula

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Winging of the scapula

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Tipping of the scapula

1999.11.16.

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