Which muscle(s) are most responsible for scapular retraction?

A Hill-Sachs lesion occurs where on the humeral head, specific to the articular cartilage? 

Usa the scenario below to answer the question: Background: A 30-year-old male weightlifter experiences acute shoulder pain while performing a bench press. He reports a tearing sensation and immediate weakness. He has a history of shoulder impingement and has been undergoing physical therapy. He describes the pain as severe and located in the anterior shoulder. He is unable to continue his workout and has difficulty lifting objects.  Question: Identify the likely injury and the (2) two most likely anatomical structures involved. 

These are all reasons and causes of rotator cuff injuries occur EXCEPT

Multidirectional instability usually means weakness or instability in only 1 direction and can be congenital or posttraumatic.

Posterior glenohumeral joint dislocations are more common than anterior glenohumeral dislication.

Injury to the long thoracic nerve usually causes tricep weakness and atrophy.

Which of the following statements are true regarding measurement of the patient’s forced vital capacity (FVC)?1.  The patient can be sitting or standing.2.  Nose clips are not required.3.  It is an effort-dependent test.4.  Accurate results can be obtained without patient cooperation.    

Which of the following components are provided by pulmonary function testing?  Lung volumes/capacities  Pulmonary (airway) mechanics  Diffusion capacity of the lungs  Distribution of ventilation/perfusion

What type of obstruction is present below?