What movement can be performed to aid palpation of the greater tubercle of the humerus?

The distal rotator cuff is partially palpable at its insertion on the greater tuberosity of the humerus. Passive extension of the shoulder moves the rotator cuff into a more palpable position. Passive extension also moves the subacromial bursa anteriorly. Palpate for any tenderness of these soft tissue structures.

What muscles attach to greater tubercle of humerus?

Muscle Attachments

Is the greater tubercle a point of muscle attachment?

The structure indicated is the greater tubercle of the humerus. The greater tubercle lies lateral to the head of the humerus as serves as the point of attachment for three of the rotator cuff muscles. There are three flat facets to which these three muscles attach: Superior facet.

How do you palpate the humerus shaft?

To palpate it, begin at the lateral epicondyle of the humerus and drop immediately distal to it. Feeling the joint space between the head of the radius and the humerus is possible.

Which muscle below does not insert onto the greater tubercle of 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.

How many rotator cuff muscles insert at the greater tubercle of the humerus?

There are four total muscles that form the rotator cuff: Supraspinatus: The supraspinatus muscle originates above the spine of the shoulder blade and inserts on the greater tuberosity of the humerus.

Is greater tubercle medial or lateral?

Anatomical Parts The greater tubercle is situated lateral to the head and lesser tubercle. Its upper surface is rounded and marked by three flat impressions: the highest of these gives insertion to the Supraspinatus; the middle to the Infraspinatus; the lowest one, and the body of the bone for about 2.5 cm.

What does tuberosity mean?

rounded prominence
: a rounded prominence especially : a large prominence on a bone usually serving for the attachment of muscles or ligaments.

How is the greater tubercle of humerus positioned?

The greater tubercle is positioned laterally. Three large smooth sides represent its superior surface and posterior surface for muscle tendon attachment: The superior facet of greater tubercle of humerus is for attachment of the supraspinatus muscle The middle facet of greater tubercle of humerus is for attachment of infraspinatus

Why does palpation of the humerus make insertion easier?

By extending the humerus palpation of the muscles insertion on the greater tuberosity becomes easier. Although the individual tendons are not distinguishable from each other. Any pain or tenderness elicited during palpation should be noted because it may indicate a rotator cuff pathology.

Where is the greater tuberosity in the shoulder?

The greater tuberosity is the prominent area of bone at the top of the humerus and is the attachment for the two large, powerful rotator cuff muscles-supraspinatus and infraspinatus. It is injured/fractured in a fall by either landing directly onto the side of your shoulder or landing with your arm outstretched.

Which is the superior facet of the humerus?

The superior facet of greater tubercle of humerus is for attachment of the supraspinatus muscle The middle facet of greater tubercle of humerus is for attachment of infraspinatus The inferior facet of greater tubercle of humerus is for attachment of teres minor You have already completed the quiz before.