Forearm

Extensor Pollicis Longus

Extensor Pollicis Longus The structure indicated is the extensor pollicis longus muscle of the posterior forearm. The extensor pollicis longus muscle is one of the muscles located in the deep layer of muscles in the posterior compartment of the forearm. There are 5 muscles in the deep layer of the posterior forearm: Supinator Abductor pollicis longus Extensor pollicis brevis Extensor pollicis longus Extensor indicis The tendon of the extensor pollicis longus forms the medial border of the anatomical snuffbox. The anatomical snuff box is an anatomical triangle located on the dorsal surface of the hand, it consists of the following …

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extensor pollicis longus

Extensor Carpi Radialis Brevis

Extensor Carpi Radialis Brevis The structure indicated is the extensor carpi radialis brevis muscle of the forearm. The extensor carpi radialis brevis muscle is one of 7 muscles located in the superficial compartment of the posterior forearm. The posterior forearm consists of a superficial and a deep compartment. The superficial compartment contains 7 muscles, whereas the deep compartment contains 5 muscles. The superficial compartment of the posterior forearm includes the following 7 muscles: Brachioradialis Extensor carpi radialis longus Extensor carpi radialis brevis Extensor digitorum Extensor digiti minimi Extensor carpi ulnaris Anconeus The extensor carpi radialis brevis muscle serves to abduct and extend the wrist joint. The muscles of the …

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extensor carpi radialis brevis

Extensor Digiti Minimi

Extensor Digiti Minimi The structure indicated is the extensor digiti minimi muscle. The extensor digiti minimi muscle is one of 7 muscles located in the superficial compartment of the posterior forearm. The posterior forearm consists of a superficial and a deep compartment. The superficial compartment contains 7 muscles, whereas the deep compartment contains 5 muscles. The superficial compartment of the posterior forearm includes the following 7 muscles: Brachioradialis Extensor carpi radialis longus Extensor carpi radialis brevis Extensor digitorum Extensor digiti minimi Extensor carpi ulnaris Anconeus The muscles of the posterior compartment of the forearm originate from the lateral epicondyle of the humerus and the supraepicondylar ridge and they are all innervated by …

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extensor digiti minimi

Median Antebrachial Vein

Median Antebrachial Vein The structure indicated is the median antebrachial vein. The median antebrachial vein is one of the veins of the superficial venous system of the upper limb. The veins of the upper limb consist of a superficial veins and deep veins. The superficial system consists primarily of the cephalic and basilic veins which originate from the dorsal venous arch and drain into the axillary vein and brachial veins respectively. In the region of the antecubital fossa, the cephalic vein is joined to the basilic vein via a vein known as the median cubital vein. The median antebrachial vein originates …

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median antebrachial vein

Radial Vein

Radial Vein The structure indicated is the radial vein of the forearm. The venous drainage of the upper limb consists of a superficial system and a deep system. The superficial system drains to the deep system. The veins of the deep system accompany the arteries, and are known as venae comitantes which is the Latin for “accompanying veins” (vena comitans = singular). The veins which accompany the arteries are often in pairs, and are therefore frequently referred to in the plural form – venae comitantes. The radial veins are paired veins which accompany the radial artery in the forearm. The …

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radial vein

Extensor Carpi Radialis Longus

Extensor Carpi Radialis Longus The muscle indicated is the extensor carpi radialis longus. The extensor carpi radialis longus muscle is one of 7 muscles located in the superficial compartment of the posterior forearm. The posterior forearm consists of a superficial and a deep compartment. The superficial compartment contains 7 muscles, whereas the deep compartment contains 5 muscles. The superficial compartment of the posterior forearm includes the following 7 muscles: Brachioradialis Extensor carpi radialis longus Extensor carpi radialis brevis Extensor digitorum Extensor digiti minimi Extensor carpi ulnaris Anconeus The muscles of the posterior compartment of the forearm originate from the lateral epicondyle of the humerus and the supraepicondylar ridge and they are all …

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extensor carpi radalis longus

Head of Radius

Head of Radius The structure indicated is the head of the radius. The proximal end of the radius consists of the following features Head Neck Radial tuberosity The head of the radius articulates with the capitulum of the humerus (humeroradial joint) which is one of three articulations at the elbow joint. The other two articulations at the elbow joint are the articulations between the trochlea notch of the ulna and the trochlea of the humerus, and the joint between the radial head and the radial notch of the ulna – the proximal radio-ulnar joint. The radial head is encapsulated by …

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Head of Radius

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

Flexor Carpi Radialis

Flexor Carpi Radialis The structure indicated is the flexor carpi radialis muscle. The flexor carpi radialis is one of four muscles in the superficial layer of muscles in the anterior compartment of the forearm. The anterior compartment of the forearm consists of three layers of muscles: Superficial layer Intermediate layer Deep layer Four muscles are located in the superficial layer (from lateral to medial): Flexor carpi ulnaris Palmaris longus Flexor carpi radialis Pronator teres All four muscles of the superficial layer have a common origin on the medial epicondyle of the humerus. Origin: Medial epicondyle of humerus Insertion: Bases of …

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flexor carpi radialis

Palmaris Longus

Palmaris Longus The structure indicated is the palmaris longus muscle of the forearm. The palmaris longus is one of four muscles in the superficial layer of muscles in the anterior compartment of the forearm. The anterior compartment of the forearm consists of three layers of muscles: Superficial layer Intermediate layer Deep layer Four muscles are located in the superficial layer (from lateral to medial): Flexor carpi ulnaris Palmaris longus Flexor carpi radialis Pronator teres All four muscles of the superficial layer have a common origin on the medial epicondyle of the humerus. Origin:  medial epicondyle of humerus Insertion: distal half …

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palmaris longus