Last updated on March 5th, 2025 at 05:31 pm
The human arm, or simply the human upper limb, has an upper arm and forearm. The upper arm bone consists of a single long and strong bone, and there are two bones in the forearm. So, the human arm consists of three long bones in total.
We all know the function of our arm and hand, in this article we will discuss what these three bones are. What we call it and its few anatomical features. We will also cover the possible fractures these bones often encounter.
So, without delay let’s get started.
Anatomy of the arm bone
The bone of the upper arm is known as the humerus bone, it is comparatively stronger than the bones of the forearm. Our forearm consists of two bones. These are the radius and ulna bones. Let us start with the humerus bone.
Humerus bone
The head is hemispherical and fits into the outer end of the scapula to make the shoulder joint. This hemispherical shape of the head of the humerus gives it a great degree of freedom at the
Just move your shoulder and observe that we can do all the following movements like:
- Shoulder elevation,
- Extension,
- External rotation of the shoulder
- Shoulder internal rotation,
- Abduction,
- Adduction,
- Shoulder circumduction
Just below the head of the humerus, the bone takes a long and thick cylindrical shape that forms the shaft of the humerus. On its upper end, the shaft is a bit circular in cross-section that gets flat at the lower end.
At the end of the flat and triangular lower end of the shaft is an articular surface known as a condyle. This articular surface together with the upper end of the bones of the forearm makes an elbow joint.
Common fractures in humerus bone
The common fractures and dislocation that humerus bone can be subjected to are:
- Shoulder dislocation.
- Greater trochanter fracture.
- Fracture shaft of humerus.
- Supracondylar fracture.
- Intercondylar fracture.
Radius and ulna bone
The two bones of the forearm are radius and ulna. The radius lies on the outer side of the forearm and the ulna on the inner side.
To make it clear and memorable, the bone that aligns with our thumb is the radius bone and the bone that aligns with our little finger is the ulna bone.
They both lie parallel and the upper end takes part in elbow joint formation and the lower end forms the wrist joint.
Common fracture of ulna and radius bone
- Monteggia fracture dislocation.
- Colle’s fracture,
- Smith fracture.
The author is a physiotherapist who has been practising for the last 17 years. He owns a successful physiotherapy clinic named "Physiofirst" in Rourkela, Odisha, India.
He holds a Bachelor's in Physiotherapy (BPT) from SVNIRTAR (Swami Vivekananda National Institute of Rehabilitation and Research), one of the prestigious physiotherapy schools in India.
Taking every pain and disability case as a challenge is his motto. Whatever he learns dealing with his patient, he shares it with the world through blogs and e-books.
He also owns a blog, www.physiosunit.com and a YouTube channel, "Sunit Physiotherapist" with over 8 lakh active subscribers. Here, he shares everything he gets to learn serving the patient. His knowledge and invaluable experience in the field are proving beneficial to many.
Email him: sunitekka@gmail.com
Phone: +91-9178817004
Join him: www.facebook.com/physiocapsule
Pingback: 9 Easy Supracondylar Fracture Humerus Physiotherapy Exercises| Elbow Fracture - Physiosunit
This literary analysis essay example is a nice help for everyone interested in writing craft and wish to find answer on all the interesting related issues.
That first diagram picture of a humerus is incorrectly labeled as a femur. "Greater Trochanter" should be "Greater Tubercle". "Medial and lateral malleolus" should be "medial and lateral epicondyle". There is no such thing as a "condylar". That line is pointing to a random spot between the trochlea and the capitulum. Very misleading image.