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Rehabilitation of Shoulder Injuries Adhesive Capsulitis/Frozen Shoulder Rotator Cuff Strains Jim Olds BHSc Dip RM Member ANTA Associate, Sports Medicine Australia Muscles involved in movements of the Glenohumeral Joint • • • • • • Flexion: 2 primary, 1 secondary Extension: 3 primary, 2 secondary Abduction: 2 primary, 3 secondary Adduction: 2 primary, 1 secondary External rotation: 2 primary, 1 secondary Internal rotation: 4 primary, 1 secondary • Total = 15 primary and 6 secondary Common injuries of the shoulder • With so many primary and secondary muscles involved in the wide variety of movements available at the shoulder, is it surprising we see so many injuries and conditions which affect this joint? Stabilizers • The glenohumeral joint is a ball and socket joint. • Unlike the hip joint the glenoid cavity is a shallow socket which requires extra stability. • The main stabilizer of the shoulder is the inferior glenohumeral ligament. Additional stability • Glenoid labrum and capsule • Rotator cuff muscles: supraspinatus infraspinatus teres minor subscapularis • Other stabilisers consist of the teres major and the serratous anterior, the latter via location of the scapula. Impingement and instability • Most shoulder pathology relates to the above two conditions in some way. • Impingement occurs when the space between the acromion, the coracoacromial arch, the AC joint and the glenohumeral joint is functionally narrowed. (Brukner& Khan, 1993) Impingement results from: • Encroachment from above • Swelling of rotator cuff tendons • Excessive elevation of humeral head Encroachment from above; • This is usually due to abnormalities of the surrounding structures. • These are either congenital, such as “os acromiale”, sloped acromion. • Or due to osteophyte formation (spurring) • Poor muscular stabilization of the scapula is a common cause of encroachment of the subacromial space in younger athletes. Swelling of rotator cuff tendons The swelling of these tendons is another cause of narrowing within the subacromial space often due to an intrinsic overuse tendinitis. This condition is frequently associated with poor biomechanics such as faulty technique in throwing or other overhead activities. Instability • The combination of congenital abnormalities, osteophyte formation, thickening of some structures through aging, poor biomechanics and overuse factors often lead to an instability of the glenohumeral joint . • This instability leads to rotator cuff fatigue and may cause swelling of the tendons in the subacromial space. Overuse and misuse • Ignoring the onset of early pain signals and a resultant loss of power often results in a change in technique. • The poor biomechanics which occur as a result of a continuation of training and competition while compensating for a low grade injury are common. • This combination of continued activity, and poor technique often result in further instability of a compromised glenohumeral joint complex. Elevation of the humeral head • As a result of chronic instability the rotator cuff tendons are likely to be weakened by the excessive load being placed upon them. • Laxity of the anterior shoulder capsule develops over time due to the repeated stress placed on the static stabilizers at the extremes of motion. Understanding instability • As the instability develops, continued use of the shoulder will force the humeral head up against the undersurface of the rotator cuff tendons leading to ischemia and further damage. • Whenever assessing anyone with impingement we must consider the possibility of instability and its role in the development of the condition. Accurate assessment • If the presence of instability is not recognized and treated, the impingement symptoms are likely to persist. • Careful attention is paid to the person’s description of any event leading to their attendance at your clinic. • If you suspect a dislocation, subluxation or fracture, refer immediately to an appropriate medical practitioner. Step deformity Clinical Assessment • From a remedial therapists perspective experience has shown we are more likely to see chronic and acute on chronic injury patterns. • ROM testing is essential to gain an accurate picture of painful arcs and loss of function Observation • Viewing the client in each plane in the standing position will also give an accurate picture of shoulder function bilaterally and highlight any other considerations, eg upper crossed syndrome, which may be relevant in establishing an accurate prognosis for this client’s recovery. ROM Testing • The shoulder allows the following movements: • Flexion and extension • Abduction and adduction • Medial and lateral rotation • Circumduction • Initial testing should begin with a full assessment of range of motion Active Free or AF testing • Active free testing describes how a client would move their arm/shoulder through the entire normal ROM described above. • Both shoulders must be assessed for comparison and what is normal for each client. • Scapulohumeral rhythm can easily be assessed at this point. Scapulohumeral Rhythm Hoppenfeld: Physical Examination of the Spine and Extremities: RANGE OF MOTION: Figure 51, p 22. Passive movements • Should you detect any loss of ROM you should attempt to move the limb passively through those painful arcs in an attempt to establish any joint capsule pathology. • This should be done with utmost care so as not to exacerbate an existing condition or increase the extent of an injury which currently exists. Special Tests • • • • Scapulohumeral Rhythm Test impingement test “empty can” test instability test; posterior/anterior, superior/inferior draw • check quality of endfeel in each test • Active Resisted tests in all ROM to establish neuromuscular inhibition X-ray and ultrasound • Prior to beginning treatment, should you have any doubt as to the extent of injury, it is prudent to encourage your client to have an x-ray of the shoulder. If this has already been done and doubt prevails, an ultrasound may detect any injured tendons which may not have been detected by xray. Cailliet: Soft Tissue Pain and Disability: DROP SIGN; Figure 8-23, p 277 Active Trigger Points: TrPs • Active trigger points may be detected during routine Neuromuscular Technique, NMT (Chaitow Soft Tissue Manipulation 1993) • As shoulder pain may radiate proximally into the neck, upper arm or even the forearm, wrist and hand, a thorough evaluation needs to be made via NMT and any trigger points deactivated during this process. Rotator Cuff TrPs • NMT of both dorsal and ventral surfaces of the scapula region on the affected side will need to be applied to detect any active TrPs of the infraspinatous, teres minor and subscapularis muscles. NMT over the superior border of the scapula will detect any TrPs in the supraspinatus region. Muscle energy technique • Following a satisfactory palpatory examination and TrP deactivation. A warmup of the region should be completed. Post isometric relaxation, PIR, operator direct method may then be attempted to release any residual tension and discomfort in the region. Should this prove too uncomfortable, alternating between operator direct and patient direct methods will often bring results. Cervical considerations • As active TrPs may arise within the sternocleidomastoid, scalene and upper trapezius regions concommitant with a shoulder injury, NMT and PIR may also be employed to obliterate any remaining TrPs and achieve optimal ROM of these segments. • This pressure and stretch approach has been shown to be useful in clearing any residual stiffness and pain in the region (Travell and Simons 1982). Adhesive Capsulitis • Adhesive Capsulitis or Frozen Shoulder occasionally occurs in the older athlete/person. • This is a painful condition which occurs as a result of inflammation of the GH joint and the surrounding capsule. • The pain results in marked limitation of all movements, these may be difficult to treat. (Brukner&Khan 1993) Cailliet: Soft Tissue Pain and Disability: SUBTLE SIGNS OF ADHESIVE CAPSULITIS: Figure 8-25, p 278 Rattray & Ludwig: Clinical Massage Therapy: GLENOHUMERAL JOINT ANATOMY: Figure 34.1, p 458. Hoppenfeld: Physical Examination of the Spine and Extremities: TEST FOR ABDUCTION: Figure 52, p 23. Hoppenfeld: Physical Examination of the Spine and Extremities: FROZEN SHOULDER SYNDROME: Figure 53, p 23 Rattray & Ludwig: Clinical Massage Therapy: SHOULDER POSITION IN HYPERKYPHOSIS: Figure 34.2. p 459. Cailliet: Soft Tissue Pain and Disability: SUBTLE SIGNS OF ADHESIVE CAPSULITIS: Figure 8-25, p 278. Cailliet: Soft Tissue Pain and Disability: ADHESIVE CAPSULITIS: Figure 8-26, p 279