What are the parts of the humerus?

What are the parts of the humerus?

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 are the bone markings of the humerus?

Location Marking
Large projection located lateral to head Greater tubercle
Lateral to the humeral head on anterior surface Lesser tubercle
Groove located between the greater and lesser tubercles Intertubercular sulcus (groove)
Roughened area located on the lateral aspect of the shaft of the humerus Deltoid tuberosity

What is the structure of the humerus bone?

It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. The humeral upper extremity consists of a rounded head, a narrow neck, and two short processes (tubercles, sometimes called tuberosities).

What is spiral groove of humerus?

The radial sulcus ( also known as the musculospiral groove, radial groove, or spiral groove) is a broad but shallow oblique depression for the radial nerve and deep brachial artery. It is located on the center of the lateral border of the humerus bone.

What is the lateral part of the humerus?

Anatomical terms of bone The lateral epicondyle of the humerus is a large, tuberculated eminence, curved a little forward, and giving attachment to the radial collateral ligament of the elbow joint, and to a tendon common to the origin of the supinator and some of the extensor muscles.

Which bone markings are part of the shoulder?

The bones of the shoulder consist of the humerus (the upper arm bone), the scapula (the shoulder blade), and the clavicle (the collar bone).

What are bone markings?

Bone markings are projections and depressions found on bones, which help us to identify the location of other body structures, such as muscles. Their importance comes when we try to describe the shape of the bone or to understand how the muscles, ligaments and other structures affect this bone and vice versa.

What is a groove bone marking?

Groove – A furrow in the bone surface that runs along the length of a vessel or nerve, providing space to avoid compression by adjacent muscle or external forces. Examples include a radial groove and the groove for the transverse sinus. Head – A rounded, prominent extension of bone that forms part of a joint.

What part of the arm is the humerus?

upper arm bone
The humerus — also known as the upper arm bone — is a long bone that runs from the shoulder and scapula (shoulder blade) to the elbow.

What is the Trochlea of the humerus?

The medial portion of the articular surface of distal humerus is named the trochlea, and presents a deep depression between two well-marked borders; it is convex from before backward, concave from side to side, and occupies the anterior, lower, and posterior parts of the extremity.

Why are there two knobs at the top of the humerus?

The meeting of these bones allows for the wide range of motion which is possible at the shoulder joint, along with movement at the elbow. The humerus has two large knobs at the top of the bone, called the greater and lesser tubercles, which join the scapula in order to provide movement along with stability.

What do you need to know about the humerus?

The Anatomy of the Humerus 1 Anatomy. The humerus has two large knobs at the top of the bone, called the greater and lesser tubercles, which join the scapula in order to provide movement along with 2 Function. The head of the humerus makes up a portion of the ball-and-socket shoulder joint. 3 Associated Conditions. 4 Rehabilitation.

Where is right humerus located?

The humerus is the long bone in the upper arm. It is located between the elbow joint and the shoulder. At the elbow, it connects primarily to the ulna, as the forearm’s radial bone connects to the wrist.

Where are the anterior markings of the humerus bone?

Anterior Markings of the Humerus Bone: Deltoid Tuberosity ( Tuberositas deltoidea) is a raised, roughened area located on the lateral side of the shaft at its midpoint. It is an attachment point for the deltoid muscle.