Humerus Anatomy Quiz: Essential Structures and Joints

The Lesser Tubercle of Humerus is a bony prominence on the anterior surface of the upper end of the humerus bone. It serves as the insertion point for several muscles that move the shoulder joint.

The body (shaft) of humerus is the central portion of the upper arm bone, while the head of humerus is the rounded part that fits into the shoulder socket, the capitulum is the rounded knob on the lateral side of the lower part of the humerus, and the trochlea is the smooth, grooved articular process shaped like a pulley located at the distal end of the humerus.

The Greater Tubercle of Humerus is a large, palpable, bony prominence located on the lateral aspect of the proximal humerus. It serves as the site of attachment for multiple muscles including the supraspinatus, infraspinatus, and teres minor. The Lesser Tubercle of Humerus is located on the anterior aspect, the Intertubercular Groove is a depression between the two tubercles, and the Deltoid Tuberosity is located on the lateral midshaft of the humerus.

The olecranon fossa of humerus is a depression on the posterior surface of the humerus that accommodates the olecranon process of the ulna during extension of the elbow joint.

The head of the humerus is the rounded portion that articulates with the shoulder socket, also known as the glenoid fossa of the scapula. The shaft is the long, cylindrical part of the bone, while the cap or neck do not accurately describe this specific portion.

The joint connecting the shoulder to the arm is called the Glenohumeral joint as it is where the ball of the humerus fits into the socket of the scapula. The Radial joint connects the radius to the ulna in the forearm, the Carpal joint refers to the joints of the wrist bones, and the Tibiofemoral joint connects the tibia to the femur in the knee.

The Anatomical Neck of the Humerus is the slightly constricted portion of the Humerus bone located immediately below the head of the bone. It serves as the attachment point for several muscles and ligaments.

The surgical neck of the humerus is a frequent location for fractures due to its relatively narrow diameter and weakened structure, making it more susceptible to injury compared to other parts of the bone.

The deltoid tuberosity of humerus is a rough, triangular eminence on the anterolateral surface of the humerus where the deltoid muscle attaches. The other options are different structures or parts of the humerus.

The coronoid fossa of the humerus is a small depression located on the anterior surface of the humerus, just above the trochlea. It is one of the three fossae in the humerus along with the radial and olecranon fossae.

The lateral epicondyle of humerus is a prominent bony protrusion located on the distal end of the humerus bone, serving as an attachment site for various muscles and ligaments.

The radial fossa of humerus is a shallow depression on the lateral side of the distal end of the humerus that receives the head of the radius when the forearm is flexed.

The capitulum of the humerus is the rounded eminence on the lateral side of the distal end of the humerus, articulating with the radius. The incorrect answers refer to other specific parts of the humerus or nearby structures.

The trochlea of the humerus is the spool-shaped portion that articulates with the ulna in the elbow joint. The capitulum, medial epicondyle, and greater tubercle are other anatomical features of the humerus, but they are not the specific section referred to in this question.

The groove on the Humerus is called the Intertubercular sulcus, not Intertubercular groove, Radial groove, or Olecranon fossa.