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Examination of the instability |
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anterior6 and posterior7 instability |
It is examined by so-called plug, i.e. the head of the humerus is gently pressed dorsally or ventrally in the glenohumeral articulation. A patient lies on his/her back during this examination, his/her limb is abducted in 90 degrees.
|
inferior instability |
Its examination is similar. A distal traction on the limb is applied from the same position for the examination of the anterior and the posterior instability, and the second limb finds out the distance between the acromion and the head of the humerus. This test is thought to be positive if there is a magnifying gap sometimes connected with a sound phenomena.
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Stretching manoeuvres on the glenohumeral
instability8
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| Stretching manoeuvre on the anterior instability |
A doctor mildly press an arm downwards in the area of patient's elbow joint, and he/she simultaneously makes an outer rotation of patient's abducted arm. By an elevator mechanism an anterior shift of the head of the humerus occurs, and a pain originates in the area of the anterior part of the shoulder. If a pressure by a free patient's hand is applied into this area, a pushing of the articular head into the articular capsule happens, and it is possible to continue in the outer rotation, which would otherwise call up the soresness. Symptoms are back again if the doctor stops the pressure on the head.
| Stretching manoeuvre on the posterior instability |
6ventral
7dorsal
8tests for an
evoking of a pain at a maximal rotation in the glenohumeral articulation