Dr. OMID BANDARCHI on X: Anterior shoulder muscles, also called the pectoral muscles, attach the upper extremity to the clavicle and the thoracic cage. These muscles include the pectoralis major, pectoralis minor
![](https://pbs.twimg.com/media/GDclq7EXEAAkbBD.jpg:large)
![](https://pbs.twimg.com/media/GAOGD7dWEAALuIB.jpg)
Dr. OMID BANDARCHI on X: In shoulder x-ray don't forget: ✔️Acromioclavicular joint injury. If AC distance >8mm [some references say >7mm(males), >6mm(females): ABNORMAL👉acromioclavicular injury. ✔️To assess coracoclavicular ligament, CC distance
![](https://pbs.twimg.com/media/GEM4HEJXkAAbQ4c.jpg:large)
Dr. OMID BANDARCHI on X: Muscles of shoulder ABDUCTION (supraspinatus, deltoid, serratus anterior) and muscles of EXTERNAL ROTATION of shoulder (infraspinatus, teres minor, deltoid) shown. Also the way we can examin shoulder
![](https://pbs.twimg.com/media/F35EGAzXQAADdMA.jpg:large)
Dr. OMID BANDARCHI on X: 🔴The skeletal muscles based on the patterns of fascicle arrangement, can be classified in 7 different shapes: ✔️PARALLEL-FUSIFORM. ✔️CIRCULAR=sphincters. ✔️CONVERGENT. ✔️PENNATE (penna=feathers). ✔️UNIPENNATE
![](https://pbs.twimg.com/media/F8LAzTuWQAA5EHF.jpg)
Dr. OMID BANDARCHI on X: ✴️Absolutely Wonderful classification of the muscles of upper limb by their innervation👍 ✔️Almost all muscles of upper limb innervated by brachial plexus arising from spinal cord segments
![](https://pbs.twimg.com/media/F7JKlxyasAAuGoT.jpg:large)
Dr. OMID BANDARCHI on X: As you can see in the image ,the 5 joints of the shoulder shown. Besides, the two ligamentous attachments between the clavicle & first rib (costoclavicular lig)
![](https://pbs.twimg.com/media/GEGh__fXIAAMGIa.jpg)
Dr. OMID BANDARCHI on X: Presence of a common sensory innervation pattern for human shoulder j proved.Suprascapular,Lat pectoral, Axillary nerves are most common parent nerves supplying articular branches to shoulder j. To
![](https://pbs.twimg.com/media/GDclq7EXEAAkbBD.jpg:large)
Dr. OMID BANDARCHI on X: Anterior shoulder muscles, also called the pectoral muscles, attach the upper extremity to the clavicle and the thoracic cage. These muscles include the pectoralis major, pectoralis minor
![](https://pbs.twimg.com/media/F5KAjyOWwAADwLe.jpg)
Dr. OMID BANDARCHI on X: The greater tuberosity of the humerus with its 3 facets ,serves as the point of attachment for three of the rotator cuff muscles,as mentioned in detail. So,Fx
![](https://pbs.twimg.com/ext_tw_video_thumb/1675145134722232321/pu/img/qMYBsJj1pRcg9pZM.jpg)
Dr. OMID BANDARCHI on X: A wonderful GIF👍 from SUBSCAPULARIS MUSCLE: a powerful triangle-shaped & one of the 4 muscles of rotator cuff apparatus. Origin: subscapular fossa. Insertion: lesser tubercle of
![](https://pbs.twimg.com/media/F4gce85aIAAYW_B.jpg:large)
Dr. OMID BANDARCHI on X: Actions of the 3 parts of DELTOID MUSCLE depend on their relationship to the position of humerus & its axis of motion. At less than 60°, muscles