What is the humeral diaphysis?

The humeral diaphysis is covered by muscle on all sides, contributing to a good blood supply and high union rates. The extensive range of motion at the shoulder helps patients compensate for relatively substantial angular deformity of the humeral shaft.

What is posterior to the humerus?

Posterior Markings of the Humerus Bone: Greater Tubercle (Tuberculum majus) is a large, roughened area located lateral to the head. The supraspinatus, infraspinatus and teres minor muscles attach to this elevation.

What attaches to the greater tubercle of the humerus?

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.

What muscles attach to lesser tubercle of humerus?

Muscle Attachments

Which muscle is located on the posterior surface of the humerus?

The posterior compartment of the upper arm contains only one muscle. Triceps Brachii: The triceps brachii is a three-headed muscle. Attachments: The long head originates from the scapula, the lateral head from the proximal region of the humerus, and the medial head from the distal region of the humerus.

Where is the left humeral head?

The humerus bone is located in the upper arm, between the shoulder joint and the elbow joint. The shoulder joint, also known as the glenohumeral joint, is a ball and socket joint. The ball is the humeral head, and the socket is the glenoid fossa of the scapula.

How long does a midshaft humerus fracture take to heal?

Approximately 90% of well-selected humeral shaft fractures will heal without surgery. It takes approximately 12 weeks for bony healing in most cases. Some fractures will benefit from early fixation.

How do you fix a humeral shaft fracture?

The vast majority of mid-shaft humerus fractures heal without surgery, which minimizes complications. The most common treatment for a humeral shaft fracture is called a fracture brace, often referred to as a Sarmiento brace, named after the physician who popularized this treatment method.

What is the greater tubercle of humerus?

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.

When does the incidence of diaphyseal humerus fractures increase?

The incidence of diaphyseal humerus fractures nearly doubles with every decade of life after age 60. 1 The management of diaphyseal humerus fractures in elderly patients merits specific considerations. On the one hand, elderly patients may be less able to adapt to restricted use of the affected extremity during non-operative treatment.

How does a distal humerus fracture affect the elbow?

A distal humerus fracture is a break in the lower end of the upper arm bone (humerus), one of the three bones that come together to form the elbow joint. A fracture in this area can be very painful and make elbow motion difficult or impossible.

Is the humerus proximal or distal to the scapula?

It consists of a proximal end, a shaft and a distal end, all which contain important anatomical landmarks. The humerus articulates with the scapula proximally at the glenohumeral joint so it participates in the movements of the shoulder.

What kind of plate is used for distal humerus fractures?

(Left) Preoperative x-ray shows a displaced distal humerus fracture (arrow). (Right) The fracture has been put back into alignment and held in place with metal screws and plates. Reproduced from Bozorgnia S: Use of 90-90 plating for distal humerus fractures.