BONY SHOULDER ANATOMY 2023

Front

WHAT IS THE SUPRASPINATUS?

Back

The supraspinatus is one of the four rotator cuff muscles, located at the top of the shoulder. It is primarily responsible for abducting the arm and is the most commonly injured rotator cuff muscle.

Front

WHAT IS THE HEAD OF HUMERUS?

Back

The head of the humerus is the rounded, upper end of the humerus bone that fits into the glenoid cavity of the scapula, forming the shoulder joint.

Front

WHAT IS THE STERNOCLAVICULAR JOINT?

Back

The sternoclavicular joint is the joint between the sternum (breastbone) and the clavicle (collarbone), allowing for movement of the shoulder.

Front

WHAT IS THE INFERIOR ANGLE OF THE SCAPULA?

Back

The inferior angle of the scapula is the lowest point of the scapula, which is important for muscle attachment and shoulder movement.

Front

WHAT IS THE BICIPITAL GROOVE?

Back

The bicipital groove, also known as the intertubercular groove, is a groove on the humerus that houses the tendon of the biceps brachii muscle.

Front

WHAT ARE THE FOUR ROTATOR CUFF MUSCLES?

Back

The four rotator cuff muscles are the supraspinatus, infraspinatus, teres minor, and subscapularis, which stabilize the shoulder joint.

Front

WHAT IS THE FUNCTION OF THE ROTATOR CUFF?

Back

The rotator cuff stabilizes the shoulder joint and allows for a wide range of shoulder movements.

Front

WHAT IS THE SCAPULA?

Back

The scapula, or shoulder blade, is a flat, triangular bone that connects the humerus with the clavicle and provides attachment for several muscles.

Front

WHAT IS THE GLENOID CAVITY?

Back

The glenoid cavity is a shallow socket in the scapula that articulates with the head of the humerus to form the shoulder joint.

Front

WHAT IS THE ROLE OF THE INFRASPINATUS?

Back

The infraspinatus is a rotator cuff muscle that externally rotates the arm and stabilizes the shoulder joint.