Is humeral neck the same as surgical neck?

The surgical neck of the humerus is a constriction below the tubercles of the greater tubercle and lesser tubercle, and above the deltoid tuberosity. It is much more frequently fractured than the anatomical neck of the humerus….

Is the surgical neck of the humerus distal to the anatomical neck?

This can be remembered with the mnemonic “a lady between two majors”, with latissimus dorsi attaching between teres major on the medial lip and pectoralis major laterally. The surgical neck extends from just distal to the tuberosities to the shaft of the humerus.

What is the significance of anatomical neck of humerus?

The anatomical neck of the humerus is obliquely directed, forming an obtuse angle with the body of the humerus. It represents the fused epiphyseal plate.

Why is the surgical neck of the humerus more likely to fracture?

As noted earlier, the surgical neck is the most frequent site of a humerus fracture in adults. Surgical neck fractures can result in abduction of the proximal fragment by the rotator cuff. Fractures between the pectoralis major and deltoid insertions result in adduction of the proximal fragment by the pectoralis.

Why surgical neck is called surgical neck?

The circumference of its articular surface is slightly constricted and is termed the anatomical neck, in contradistinction to a constriction below the tubercles called the surgical neck which is frequently the seat of fracture.

Which nerve is related to surgical neck of humerus?

axillary nerve
The axillary nerve, formed from the posterior cord of the brachial plexus, wraps around the surgical neck of the humerus, and provides innervation to the deltoid and rotator cuff muscles, specifically the teres minor.

What is the most distal feature of the humerus?

The distal end of the humerus has two articulation areas, which join the ulna and radius bones of the forearm to form the elbow joint. The more medial of these areas is the trochlea, a spindle- or pulley-shaped region (trochlea = “pulley”), which articulates with the ulna bone.

What is the weakest part of the humerus?

Distribution of bone mineral density and bone strength of the proximal humerus. Clinical experience led us to the hypothesis that in the proximal humerus cancellous bone beneath the top part of the head is the strongest and the bone of the humeral neck is the weakest.

Can you move your arm with a broken humerus?

A fractured humerus or upper arm is extremely painful, and the patient may not be able to move their arm. Sometimes, the radial nerve (one of the main nerves in the arm) may be injured. This happens about 15% of the time. It is more common with fractures that happen closer to the base of the bone.

What is the muscle near surgical neck?

The quadrangular space is bordered superiorly by the lower border of teres minor muscle, laterally by the surgical neck of the humerus, inferiorly by the upper boundary of teres major, and medially by the long head of the triceps brachial.

What wraps around surgical neck of humerus?

The axillary nerve, formed from the posterior cord of the brachial plexus, wraps around the surgical neck of the humerus, and provides innervation to the deltoid and rotator cuff muscles, specifically the teres minor.

What muscles are attached to the humerus?

The pectoralis major, latissimus dorsi, deltoid, and rotator cuff muscles connect to the humerus and move the arm. The muscles that move the forearm are located along the humerus, which include the triceps brachii, biceps brachii, brachialis, and brachioradialis.

How is the humerus different from the surgical neck?

The surgical neck is a common site for fractures (hence its name), while fractures of the anatomical neck are rare. The shaft of the humerus has a cylindrical shape proximally then flattens to produce more distinct surfaces.

What’s the difference between the anatomic and surgical neck?

Returning to the humerus, the anatomic neck is mostly notable as a defined landmark but has less clinical application. The surgical neck of the humerus refers to the narrowing of the humerus in the proximal diaphysis.

Is there a nonoperative treatment for a humerus fracture?

Nonoperative sling immobilization followed by progressive rehab indications most proximal humerus fractures can be treated nonoperatively including minimally displaced surgical and anatomic neck fractures. greater tuberosity fracture displaced < 5mm.

Where does the humerus begin and where does it end?

The humerus begins proximally as a rounded head and joins the greater and lesser tubercles via the anatomical neck of the humerus. The surgical neck is found just inferior to the tubercles where the shaft begins. The surgical neck is a common site for fractures (hence its name), while fractures of the anatomical neck are rare.