Palpation of the deltoid muscle
The deltoid muscle is easy to recognize. It forms the most important muscular mass of the shoulder and is responsible for its round look. The anterior portion overlies the anterior border of the acromion and the lesser tuberosity.
The middle portion lies over the lateral border of the acramion and the greater tuberosity, and the posterior portion builds the posterior aspect of the shoulder and covers the lateral part of the spine of the scapula.
For the posterior margin of the spine and follow this further laterally where it becomes more prominent. The spine can be felt to make a 90° forwards turn
- the acromial angle
- before it forms the acromion.
- together with the acromial end of the clavicle and the coracoacromial ligament it forms the coracoacramial roof.
The spine divides the scapula into a supraspinous fossa and an infraspinous fossa, in which lie, respectively, the supraspinatus and the infraspinatus muscle bellies. Place the subject sitting with the arm in 90° abduction and palpate in the supraspinous fossa in a lateral direction. The spine of the scapula is felt to meet the clavicle. At this point lies the posterior aspect of the acromioclavicular joint. Place the thumb at this point and palpate simultaneously for the anterior indentation.
Ask the subject to abduct the arm against resistance. A groove can be palpated between the anterior and middle portions of the deltoid. This overlies the bicipital groove.
If you would like an appointment / review with our soft tissue specialist in Singapore, the best way is to call +65 6664 8135 or click here to book an appointment at the clinic. If you would like to speak to one of our clinicians first about e.g. anterior deltoid palpation, infraspinatus palpation, spine palpation, bicipital groove palpation, soft tissue palpation, acromion palpation etc, then please contact email@example.com or SMS/WhatsApp to +65 6664 8135.
Rest assured that the best possible care will be provided for you.