Arm

Brachialis

Brachialis The structure indicated is the brachialis muscle. The brachialis muscle is one of three muscles in the anterior compartment of the arm: Biceps brachii Brachialis Coracobrachialis The muscles of the anterior compartment are innervated by the musculocutaneous nerve and generally serve to flex the forearm at the elbow joint. The brachialis muscle lies deep to the biceps brachii muscle and is synergistic in its action, assisting with flexion of the forearm at the elbow joint. Origin: Distal half of anterior humerus Insertion: Ulna tuberosity Action: Flexion of elbow Innervation: Musculocutaneous nerve Learn more about the anatomy of the arm …

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Brachialis

Biceps Brachii – Long Head

Biceps Brachii – Long Head The structure indicated is the long head of the biceps brachii muscle. The biceps muscle is one of three muscles in the anterior compartment of the arm: Biceps brachii Brachialis Coracobrachialis The muscles of the anterior compartment are innervated by the musculocutaneous nerve and generally serve to flex the forearm at the elbow joint. The biceps brachii muscle is comprised of two muscular heads: Short head Long head The long head of the biceps brachii originates on the supraglenoid tubercle of the scapula, and traverses the superior aspect of the glenohumeral joint to descend in …

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biceps brachii long head

Trochlea of Humerus

Trochlea of Humerus The structure indicated is the trochlea of the humerus. The distal end of the humerus consists of several features: Condyle, consisting of the capitulum and trochlea Medial and lateral epicondyles Medial and lateral supracondylar ridges Radial fossa, coronoid fossa, olecranon fossa A large central condyle which has two articular components – the capitulum is the lateral articular component and articulates with the radius, and the trochlea is the medial component which articulates with the ulna. Learn more about the anatomy of the elbow joint in this tutorial.
Trochlea

Lateral Supracondylar Ridge

Lateral Supracondylar Ridge The distal end of the humerus consists of several features: Condyle, consisting of the capitulum and trochlea Medial and lateral epicondyles Medial and lateral supracondylar ridges Radial fossa, coronoid fossa, olecranon fossa A large central condyle which has two articular components – the capitulum which articulates with the radius, and the trochlea which articulates with the ulna. Either side of the humeral condyle, are two epicondyles, the medial and lateral epicondyles superior to which are the medial and lateral supracondylar ridges. The following muscles attach to the lateral supracondylar ridge: Brachioradialis Extensor carpi radialis longus Triceps brachii …

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Lateral supracondylar ridge

Biceps Brachii – Short Head

Biceps Brachii – Short Head The structure indicated is the short head of the biceps brachii muscle. The biceps muscle is one of three muscles in the anterior compartment of the arm: Biceps brachii Brachialis Coracobrachialis The muscles of the anterior compartment are innervated by the musculocutaneous nerve and generally serve to flex the forearm at the elbow joint. The biceps brachii muscle is comprised of two muscular heads: Short head Long head The short head of the biceps brachii attaches to the coracoid process of the scapula. There are three muscles which attach to the coracoid process: Short head …

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Biceps brachii short head

Capitulum of Humerus

Capitulum of Humerus The structure indicated is the capitulum of the distal humerus. The distal end of the humerus consists of several features: Condyle, consisting of the capitulum and trochlea Medial and lateral epicondyles Medial and lateral supracondylar ridges Radial fossa, coronoid fossa, olecranon fossa A large central condyle which has two articular components – the capitulum which articulates with the head of the radius, and the trochlea which articulates with the ulna. Either side of the humeral condyle, are two epicondyles, the medial and lateral epicondyles superior to which are the medial and lateral supracondylar ridges. Learn more about …

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Capitulum of humerus

Median Cubital Vein

Median Cubital Vein The structure indicated is the median cubital vein. The median cubital vein is a superficial vein located in the cubital fossa anteriorly in the elbow, and connects the basilic and cephalic veins. The basilic and cephalic veins are two large superficial veins of the upper limb which arise from the dorsal venous network of the hand. The basilic vein arises medially from the dorsal venous network of the hand, whereas the cephalic vein arises laterally from the dorsal venous network. These two veins drain to the axillary vein. The deep venous system of the upper limb follows …

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medial cubital vein

Radial Fossa

Radial Fossa The structure indicated is the radial fossa of the distal humerus. The distal end of the humerus consists of several features: Condyle, consisting of the capitulum and trochlea Medial and lateral epicondyles Medial and lateral supracondylar ridges Radial fossa, coronoid fossa, olecranon fossa A large central condyle which has two articular components – the capitulum which articulates with the radius, and the trochlea which articulates with the ulna. Either side of the humeral condyle, are two epicondyles, the medial and lateral epicondyles superior to which are the medial and lateral supracondylar ridges. There are three fossae found distally …

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radial fossa

Surgical Neck of Humerus

Surgical Neck of Humerus The structure indicated is the surgical neck of the humerus. The proximal end of the humerus consists of the following features: Head Anatomical neck Surgical neck Greater and lesser tubercles Intertubercular sulcus (bicipital groove) Deltoid tuberosity Superior, middle and inferior facets The anatomical neck of the humerus is located distal to the head of the humerus, at an oblique angle to the shaft of the humerus. The surgical neck of the humerus on the other hand is a constriction of the humerus located inferior to the greater and lesser tubercles. It is a clinically important anatomical …

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surgical neck of humerus

Medial Epicondyle of Humerus

Medial Epicondyle of Humerus The structure indicated is the medial epicondyle of the humerus. The distal end of the humerus consists of several features: Condyle, consisting of the capitulum and trochlea Medial and lateral epicondyles Medial and lateral supracondylar ridges Radial fossa, coronoid fossa, olecranon fossa A large central condyle which has two articular components – the capitulum which articulates with the radius, and the trochlea which articulates with the ulna. Either side of the humeral condyle, are two epicondyles, the medial and lateral epicondyles superior to which are the medial and lateral supracondylar ridges. The medial and lateral epicondyles …

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medial epicondyle of humerus