What is the lesser tubercle?

What is the lesser tubercle?

Lesser Tubercle – a smaller bony knob that sits just medial (closer to the midline) and anterior (in front of) to the greater tubercle. This is the insertion point for the only muscle of the rotator cuff that doesn’t insert on the greater tubercle. Crest of greater tubercle – Crest is a Latin term meaning ridge.

What is the difference between greater and lesser tubercle?

The greater tuberosity it is located lateral to the head. The lesser tuberosity is located inferior to the head, on the anterior part of the humerus, Its very prominent and palpable. Bicipital (intertubercular) groove is located between the two tuberosities. The Biceps tendon is placed here.

What do the greater and lesser tubercles do?

The greater tubercle therefore acts as a location for the transfer of forces from the rotator cuff muscles to the humerus. The fourth muscle of the rotator cuff (subscapularis muscle) does not attach to the greater tubercle, but instead attaches to the lesser tubercle.

What is the function of the lesser tubercle of the humerus?

Description. The lesser tubercle is located on the craniomedial part of the proximal extremity of humerus. It gives insertion for the muscles of the shoulder blade (infraspinous and supraspinous muscles).

Is lesser tubercle lateral?

The lesser tubercle is located anterior to the anatomical neck and has a smooth, palpable muscular impression. The lateral part forms the medial margin of the intertubercular sulcus. The subscapularis muscle attaches at this tubercle and the transverse ligament of the shoulder also attaches on its lateral part.

What inserts on the lesser tubercle?

The subscapularis muscle originates at the subscapular fossa and inserts into the lesser tubercle of the humerus.

Where is the crest of the lesser tubercle?

The crest of the lesser tubercle forms the medial lip of the intertubercular groove. It is the insertion site for the teres major and latissimus dorsi muscles, medial rotators and adductors of the arm.

Where is the lesser tuberosity of humerus?

Due to its small size and its location on the medial side of the head of the humerus, the lesser tuberosity is protected from direct injury [3,6-9].

What lies between the greater and lesser tubercle of the humerus?

Intertubercular Groove or Sulcus (Sul-cus intertubercularis) is a narrow, longitudinal depression between the greater and lesser tubercles. This indentation, which is also called the bicipital groove, is a passageway for the tendon of the long head of the biceps brachii.

How do you find the lesser tubercle?

You should be able to feel your palpating finger dropping into the bicipital groove as it passes under your finger pads (C). As you continue to move the client’s arm passively into lateral rotation, you will then feel the lesser tubercle under your fingers, just medial to the bicipital groove (D).

Where do you find the greater and lesser tubercles?

The greater and lesser tubercles are part of the humerus, a bone located in the upper arm.

Whats the difference between a tubercle and tuberosity?

Tubercle vs tuberosity A tubercle is a small rounded prominence, often a site of tendon or ligament attachment e.g. adductor tubercle of the femur. A tuberosity is larger, found in varying shapes and often rough in texture. The ulnar tuberosity is one example.