What is the humerus responsible for in the shoulder?

Function. The head of the humerus makes up a portion of the ball-and-socket shoulder joint. This area also serves as the insertion point for muscles which make up the shoulder girdle.

What is the humerus bone in the arm?

The humerus is the arm bone between your shoulder and your elbow. There are two types of humerus fractures based on the location of the break(s). Trauma from a fall or accident are often the cause of this type of fracture.

What happens when you break your humerus bone?

A broken upper arm (fractured humerus) can be extremely painful, so much so that you may feel sick, dizzy or faint. Other symptoms of a broken upper arm are: You will be unable to use your arm. Your elbow or upper arm may be swollen.

What are the features of the humerus?

The humerus is the longest and largest bone of the upper limb. 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 muscles abduct the humerus?

Muscles: supraspinatus (initiates abduction – first 15 degrees), deltoid (up to 90 degrees), trapezius and serratus anterior (scapular rotation, for abduction beyond 90 degrees). The deltoid muscle abducts the arm, but at 90 degrees the humerus bumps into the acromion.

What muscles attach to humerus?

The pectoralis major, teres major, and latissimus dorsi insert at the intertubercular groove of the humerus. They work to adduct and medially, or internally, rotate the humerus. The infraspinatus and teres minor insert on the greater tubercle, and work to laterally, or externally, rotate the humerus.

What is human humerus?

humerus, long bone of the upper limb or forelimb of land vertebrates that forms the shoulder joint above, where it articulates with a lateral depression of the shoulder blade (glenoid cavity of scapula), and the elbow joint below, where it articulates with projections of the ulna and the radius.

How painful is a broken humerus?

Humerus fractures are a very painful injury, and patients may need to take pain relief medications regularly as prescribed by the doctor. The fractured portion may hurt intensely, swell, and feel stiff. Stiffness may continue well after the fracture has healed.

How long does the humerus bone take to heal?

The humerus is the long bone in your upper arm. When broken it needs specialised care so that you can cope with the problems it brings. It will take a minimum of 12 weeks to heal. This is a very painful injury so take your pain relief medication regularly as prescribed by the doctor.

How strong is the humerus bone?

The humerus is a strong bone, analogous to the femur in the leg (which is the strongest bone in the body). It does not absorb the intensity of stress that the forearm bones do when you fall and catch yourself with your hands, since the humerus is farther up the chain of bones.

What muscles connect to the humerus?

The pectoralis major, latissimus dorsi, deltoid, and rotator cuff muscles connect to the humerus and move the arm.

What are the five functions of bone?

The five main functions of bones are support, protection, movement, storage and blood cell formation. Support Like the steel framework of a building, bones provide rigidity, which gives the body shape and supports the weight of the muscles and organs.

What does a humerus bone tell?

Your humerus is the long bone in your upper arm. The connections it makes at the shoulder and elbow enable you to make many different arm movements. The humerus is also a connection point for arm and shoulder muscles . Humerus fractures are a common injury that are often caused by falls, car accidents, or contact sports.

What bone articulates medially with humerus?

Humerus is a typical long bone present in the arm that articulates proximally with the scapula and distally with the bones of the forearm, namely, radius and ulna.

What are the most common causes of humerus pain?

Fracture of the humerus