Anatomical Parts The lateral portion of the articular surface of humerus consists of a smooth, rounded eminence, named the capitulum of the humerus; it articulates with the cupshaped depression on the head of the radius, and is limited to the front and lower part of the bone.
What does the capitulum of the humerus articulate with?
the radius The capitulum laterally articulates with the radius; the trochlea, a spool-shaped surface, articulates with the ulna.
What is the Capitellum?
The capitellum, also referred to as the capitulum, is the lateral part of the humeral condyle that articulates with the radial head.
Is the capitulum part of the trochlea?
The trochlea has the capitulum located on its lateral side and the medial epicondyle on its medial. It is directly inferior to the coronoid fossa anteriorly and to the olecranon fossa posteriorly.
What is the function of the capitulum of the humerus?
capitulum: At the distal head of the humerus, it articulates with the radius of the forearm. trochlea: At the distal head of the humerus, it articulates with the ulna of the forearm. anatomical neck: A constriction adjacent to the humeral head that increases the range of movement possible at the shoulder joint.
Where are capitulum found?
Immediately lateral to the trochlea is the capitulum (“small head”), a knob-like structure located on the anterior surface of the distal humerus. The capitulum articulates with the radius bone of the forearm. Just above these bony areas are two small depressions.
How do you palpate capitulum?
What do you mean by capitulum?
1 : a rounded protuberance of an anatomical part (such as a bone) 2 : a racemose inflorescence (as of the sunflower) with the axis shortened and dilated to form a rounded or flattened cluster of sessile flowers — see inflorescence illustration.
What portion of the radius articulates with the capitulum of the humerus?
The capitulum of the humerus articulates with the head of the radius. To what does the head of the radius articulate? The head of the radius articulates with the capitulum of the humerus AND the radial notch of the ulna.
What is a capitellum fracture?
Fracture of the capitellum is an intra-articular fracture of the elbow, analogous to the Hoffa fracture of the knee. It is a rare fracture which represents an injury to the lateral column of the distal humerus. The mechanism of injury is usually an axial loading through the radial head [3].
Where is the capitellum bone?
In human anatomy of the arm, the capitulum of the humerus is a smooth, rounded eminence on the lateral portion of the distal articular surface of the humerus. It articulates with the cupshaped depression on the head of the radius, and is limited to the front and lower part of the bone.
What is osteochondral defect of capitellum?
In certain sports, like baseball and gymnastics, and in professions that require heavy lifting, more pressure than normal is transmitted to the outside of the elbow. This sometimes causes injury to the bone and cartilage of the capitellum called an osteochondral defect (osteo = bone, chondral = cartilage).
What is capitulum and trochlea?
smooth articular surfaces (capitulum and trochlea), two depressions (fossae) that form part of the elbow joint, and two projections (epicondyles). The capitulum laterally articulates with the radius; the trochlea, a spool-shaped surface, articulates with the ulna.
Is the capitulum medial or lateral?
The capitulum is on the lateral side, the trochlea is medial. On the posterior surface, above the trochlea is a large dent, called the olecranon fossa. The proximal end of the ulna fits into this fossa when the elbow is extended.
Is the capitulum part of the ulna?
Capitulum of humerus – Capitulum humeri In dog and cats, the condyle is divided in two parts: The trochlea, the medial part, that articulates with ulna. The capitulum, the lateral part; that articulates with radius.
Is the capitulum a condyle?
Although not generally termed condyles, the trochlea and capitulum of the humerus act as condyles in the elbow, and the femur head acts as a condyle in the hip joint.
What is Panner disease?
Panner’s disease causes elbow pain around the outside part of the elbow. The pain usually gets worse with activity, such as throwing a ball, and becomes better with rest. The elbow also may be stiff, swollen, and hurt to touch.
What is sigmoid notch?
The sigmoid notch (also referred to as the trochlear groove or semilunar notch) is a cup-like depression within the proximal ulna formed from the olecranon and the coronoid process (Fig. 2), and it is covered with articular cartilage in an arc of 190 degrees when viewed sagittally.
What bones does the capitulum articulate with?
The capitulum articulates with the radius bone of the forearm. Just above these bony areas are two small depressions. These spaces accommodate the forearm bones when the elbow is fully bent (flexed).
How do you remember capitulum and Trochlea?
The mnemonic of the order of appearance of the individual ossification centers is C-R-I-T-O-E: Capitellum, Radial head, Internal (medial) epicondyle, Trochlea, Olecranon, External (lateral) epicondyle.
Where is the radial notch?
The radial notch is a narrow, oblong, articular depression on the lateral side of the coronoid process; it receives the circumferential articular surface of the head of the radius. It is concave from before backward, and its prominent extremities serve for the attachment of the annular ligament.
What is palpation?
Palpation is a method of feeling with the fingers or hands during a physical examination. The health care provider touches and feels your body to examine the size, consistency, texture, location, and tenderness of an organ or body part.
What is the epicondyle area?
The elbow joint is made up of the bone in the upper arm (the humerus) and one of the bones in the lower arm (ulna). The bony prominences, or bumps, at the bottom of the humerus are called the epicondyles. The bump on the outer side of the elbow is called the lateral epicondyle.
How do you palpate humeral Epicondyles?
✨ Super easy palpation of the medial and lateral epicondyles of the humerus! ✨ With your elbow joint flexed to 90 degrees, place your thumb on one side of your (upper) arm and your middle finger on the other side. ✨ Slide down distally until you feel two hard bony protuberances.
Is a capitulum a flower?
Capitulum is a pseudanthium, a false flower that superficially mimics a single flower but is a highly aggregated structure comprised of multiple flowers with specialized functions.
What is capitulum with example?
capitulum A type of flowering shoot (see racemose inflorescence) characteristic of plants of the family Compositae (Asteraceae), e.g. daisy and dandelion. The tip of the shoot is flattened and bears many small stalkless flowers (florets) surrounded by an involucre (ring) of bracts.
What are the types of capitulum?
Capitulum or Racemose Head (Fig. The latter are of two types, tubular and ligulate. The florets are arranged in a centripetal fashion, e.g., younger towards the cenre and older towards the periphery. The inflorescence is surrounded by one or more whorls of bracts called involucre.
Does the radius articulate with the capitulum?
The radius articulates proximally at the elbow with the capitulum of the humerus and the radial notch of the ulna. It articulates at its distal end with the ulna at the ulnar notch and with the articular surfaces of the scaphoid and lunate carpal bones.
What part of the ulna articulates with the humerus?
trochlea Elbow. The ulna articulates with the humerus at its most proximal point forming the elbow in a hinge joint. It is the trochlea of the humerus which sits in the semi-lunar notch of the ulna to form this joint.
What bone articulates with 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.
Graduated from ENSAT (national agronomic school of Toulouse) in plant sciences in 2018, I pursued a CIFRE doctorate under contract with Sun’Agri and INRAE in Avignon between 2019 and 2022. My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. I love to write and share science related Stuff Here on my Website. I am currently continuing at Sun’Agri as an R&D engineer.