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Extensor Carpi Radialis Longus

image descriptionExtensor Carpi Radialis Longus

A posterior view of the forearm showing the bony elements and the deeper muscles. The visible, labelled muscles are as follows: Triceps Brachii, Brachioradialis, Extensor Carpi Radialis Longus (highlighted in green), Anconeus, Extensor Digitorum, Extensor Carpi Radialis Brevis, Flexor Carpi Ulnaris, Extensor Digiti Minimi, Extensor Carpi Ulnaris and Extensor Retinaculum.
A posterior view of the forearm showing the bony elements and the deeper muscles. The visible, labelled muscles are as follows: Extensor Carpi Radialis Longus (highlighted in green), Anconeus, Extensor Digitorum, Flexor Carpi Ulnaris, Extensor Digiti Minimi and Extensor Carpi Ulnaris.
A posterior view of the forearm showing the bony elements and the deeper muscles. The visible, labelled muscles are as follows: Extensor Carpi Radialis Longus (highlighted in green) and Flexor Carpi Ulnaris.
A posterior view of the forearm showing the bony elements and isolated Extensor Carpi Radialis Longus muscle.
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image descriptionExtensor Carpi Radialis Longus Muscle Attachments: Origin and Insertion

Origin (proximal attachment)
a. Distal lateral supracondylar ridge.

Insertion (distal attachment)
a. Base of 2nd metacarpal (dorsal surface).

A posterior view of the forearm showing the bony elements and the deeper muscles. The visible, labelled muscles are as follows: Triceps Brachii, Brachioradialis, Extensor Carpi Radialis Longus (highlighted in green), Anconeus, Extensor Digitorum, Extensor Carpi Radialis Brevis, Flexor Carpi Ulnaris, Extensor Digiti Minimi, Extensor Carpi Ulnaris and Extensor Retinaculum.
A posterior view of the forearm showing the bony elements and isolated Extensor Carpi Radialis Longus muscle.
A dorsal view of the forearm showing the bony elements and the attachments of the Extensor Carpi Radialis Longus muscle. The origin at the distal lateral supracondylar ridge is marked by a red oval and the insertion at the base of 2nd metacarpal (dorsal surface) is marked by a blue circle.
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Actions of the Extensor Carpi Radialis Longus Muscle:

a.  image descriptionExtends hand at wrist.

b.  image descriptionRadial deviates (abducts) hand at wrist.

Nerve to the Extensor Carpi Radialis Longus muscle and its spinal segment:

a. Radial nerve (C6, C7).

An overview of the posterior forearm muscles

A test yourself image of the dorsal view of the forearm showing the bony elements and the deeper muscles. The visible muscles of the forearm are numbered 1-10 and the answers in the box below are concealed.
A test yourself image of the dorsal view of the forearm showing the bony elements and the deeper muscles. The visible muscles of the forearm are numbered 1-10. The answers in the box below are as follows 1. Triceps Brachii 2. Brachioradialis 3. Extensor Carpi Radialis Longus 4. Anconeus 5. Extensor Digitorum 6. Extensor Carpi Radialis Brevis 7. Flexor Carpi Ulnaris 8. Extensor Digiti Minimi 9. Extensor Carpi Ulnaris 10. Extensor Retinaculum.
A test yourself image of the dorsal view of the forearm showing the bony elements and the deeper muscles. The visible muscles of the forearm are numbered 1-8. The answers in the box below are as follows 1. Brachioradialis 2. Extensor Carpi Radialis Longus 3. Anconeus 4. Extensor Digitorum 5. Extensor Carpi Radialis Brevis 6. Flexor Carpi Ulnaris 7. Extensor Digiti Minimi 8. Extensor Carpi Ulnaris.
A test yourself image of the dorsal view of the forearm showing the bony elements and the deeper muscles. The visible muscles of the forearm are numbered 1-7. The answers in the box below are as follows 1. Extensor Carpi Radialis Longus 2. Anconeus 3. Extensor Digitorum 4. Extensor Carpi Radialis Brevis 5. Flexor Carpi Ulnaris 6. Extensor Digiti Minimi 7. Extensor Carpi Ulnaris.
A test yourself image of the dorsal view of the forearm showing the bony elements and the deeper muscles. The visible muscles of the forearm are numbered 1-6. The answers in the box below are as follows 1. Extensor Carpi Radialis Longus 2. Anconeus 3. Extensor Digitorum 4. Flexor Carpi Ulnaris 5. Extensor Digiti Minimi 6. Extensor Carpi Ulnaris.
A test yourself image of the dorsal view of the forearm showing the bony elements and the deeper muscles. The visible muscles of the forearm are numbered 1-5. The answers in the box below are as follows 1. Extensor Carpi Radialis Longus 2. Anconeus 3. Flexor Carpi Ulnaris 4. Extensor Digiti Minimi 5. Extensor Carpi Ulnaris.
A test yourself image of the dorsal view of the forearm showing the bony elements and the deeper muscles. The visible muscles of the forearm are numbered 1-4. The answers in the box below are as follows 1. Extensor Carpi Radialis Longus 2. Anconeus 3. Flexor Carpi Ulnaris 4. Extensor Carpi Ulnaris.
A test yourself image of the dorsal view of the forearm showing the bony elements and the deeper muscles. The visible muscles of the forearm are numbered 1-3. The answers in the box below are as follows 1. Extensor Carpi Radialis Longus 2. Flexor Carpi Ulnaris 3. Extensor Carpi Ulnaris.
A test yourself image of the dorsal view of the forearm showing the bony elements and the deeper muscles. The visible muscles of the forearm are numbered 1-2. The answers in the box below are as follows 1. Extensor Carpi Radialis Longus 2. Flexor Carpi Ulnaris.
A test yourself image of the dorsal view of the forearm showing the bony elements and the deeper muscles. The visible muscles of the forearm are numbered 1-6. The answers in the box below are as follows 1. Supinator 2. Extensor Carpi Radialis Longus 3. Abductor Pollicis Longus 4. Extensor Pollicis Longus 5. Extensor Pollicis Brevis 6. Extensor Indicis.
A test yourself image of the dorsal view of the forearm showing the bony elements and the isolated Extensor Carpi Radialis Longus muscle numbered 1.
A test yourself image of the dorsal view of the forearm showing the bony elements and the attachments of the Extensor Carpi Radialis Longus muscle. The origin at the distal lateral supracondylar ridge is marked by a red oval and the insertion at the base of 2nd metacarpal (dorsal surface) is marked by a blue circle.
Test yourself while observing the Extensor Carpi Radialis Longus muscle
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