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Palmaris Longus Muscle

image descriptionPalmaris Longus Muscle

An anterior view of the forearm showing the bony elements and the associated muscles muscles. The visible, labelled muscles are as follows: Biceps Brachii, Brachialis, Pronator Teres, Brachioradialis, Extensor Carpi Radialis Longus, Palmaris Longus (highlighted in green), Extensor Carpi Radialis Brevis, Flexor Carpi Radialis, Flexor Carpi Ulnaris, Flexor Retinaculum and Flexor Aponeurosis.
An anterior view of the forearm showing the bony elements and the deeper muscles. The visible, labelled muscles are as follows: Pronator Teres, Palmaris Longus (highlighted in green), Flexor Digitorum Superficialis, Flexor Carpi Radialis, Flexor Carpi Ulnaris, Flexor Retinaculum, Flexor Aponeurosis.
An anterior view of the forearm showing the bony elements and the deeper muscles. The visible, labelled muscles are as follows: Palmaris Longus (highlighted in green), Flexor Carpi Radialis, Flexor Carpi Ulnaris, Flexor Retinaculum, Flexor Aponeurosis.
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image descriptionAttachments of the Palmaris Longus Muscle: Origin and Insertion

Origin (proximal attachment)
a. Medial epicondyle of the humerus.

Insertion (distal attachment)
a. Flexor retinaculum and palmar aponeurosis.

An anterior view of the forearm showing the bony elements and the associated muscles muscles. The visible, labelled muscles are as follows: Biceps Brachii, Brachialis, Pronator Teres, Brachioradialis, Extensor Carpi Radialis Longus, Palmaris Longus (highlighted in green), Extensor Carpi Radialis Brevis, Flexor Carpi Radialis, Flexor Carpi Ulnaris, Flexor Retinaculum and Flexor Aponeurosis.
An anterior view of the forearm showing the bony elements and the attachment of the Flexor Carpi Radialis muscle. Origin at the medial epicondyle of humerus is marked by a red oval. The insertion at the flexor retinaculum and palmar aponeurosis are marked by blue ovals. Transparent Palmaris Longus muscle connects the two attachment sites.
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Actions of the Palmaris Longus Muscle:

a.  image descriptionFlexes the hand at the wrist.

Slide 1 of the animation showing the flexion of the hand at the wrist.
Slide 2 of the animation showing the flexion of the hand at the wrist.
Slide 3 of the animation showing the flexion of the hand at the wrist.
Slide 4 of the animation showing the flexion of the hand at the wrist.
Slide 5 of the animation showing the flexion of the hand at the wrist.

b.  image descriptionTenses palmar aponeurosis.

Slide 2 of the animation showing the tension of palmar aponeurosis.
Slide 3 of the animation showing the tension of palmar aponeurosis.
Slide 4 of the animation showing the tension of palmar aponeurosis.
Slide 5 of the animation showing the tension of palmar aponeurosis.

Nerve to the Palmaris Longus muscle and its spinal segment:

a. Median nerve (C7, C8).

An Overview of the Anterior Forearm Muscles

A test yourself image of the anterior view of the forearm showing the bony elements and the associated soft structures. The visible structures of the forearm are labelled 1-11 and the answers in the box below are concealed.
A test yourself image of the anterior view of the forearm showing the bony elements and the deeper muscles. The visible structures of the forearm are numbered 1-11. The answers in the box below are as follows 1. Biceps Brachii 2. Brachialis 3. Pronator Teres 4. Brachioradialis 5. Extensor Carpi Radialis Longus 6. Palmaris Longus 7. Extensor Carpi Radialis Brevis 8. Flexor Carpi Radialis 9. Flexor Carpi Ulnaris 10. Flexor Retinaculum 11. Flexor Aponeurosis.
A test yourself image of the anterior view of the forearm showing the bony elements and the deeper muscles. The visible structures of the forearm are numbered 1-10. The answers in the box below are as follows 1. Brachialis 2. Pronator Teres 3. Brachioradialis 4. Extensor Carpi Radialis Longus 5. Palmaris Longus 6. Extensor Carpi Radialis Brevis 7. Flexor Carpi Radialis 8. Flexor Carpi Ulnaris 9. Flexor Retinaculum 10. Flexor Aponeurosis.
A test yourself image of the anterior view of the forearm showing the bony elements and the deeper muscles. The visible structures of the forearm are numbered 1-9. The answers in the box below are as follows 1. Pronator Teres 2. Brachioradialis 3. Extensor Carpi Radialis Longus 4. Palmaris Longus 5. Extensor Carpi Radialis Brevis 6. Flexor Carpi Radialis 7. Flexor Carpi Ulnaris 8. Flexor Retinaculum 9. Flexor Aponeurosis.
deeper muscles. The visible structures of the forearm are numbered 1-9. The answers in the box below are as follows: 1. Pronator Teres 2. Brachioradialis 3. Extensor Carpi Radialis Longus 4. Palmaris Longus 5. Flexor Digitorum Superficialis 6. Flexor Carpi Radialis 7. Flexor Carpi Ulnaris 8. Flexor Retinaculum 9. Flexor Aponeurosis.
A test yourself image of the anterior view of the forearm showing the bony elements and the deeper muscles. The visible structures of the forearm are numbered 1-8. The answers in the box below are as follows 1. Pronator Teres 2. Brachioradialis 3. Palmaris Longus 4. Flexor Digitorum Superficialis 5. Flexor Carpi Radialis 6. Flexor Carpi Ulnaris 7. Flexor Retinaculum 8. Flexor Aponeurosis.
A test yourself image of the anterior view of the forearm showing the bony elements and the deeper muscles. The visible structures of the forearm are numbered 1-7. The answers in the box below are as follows 1. Pronator Teres 2. Palmaris Longus 3. Flexor Digitorum Superficialis 4. Flexor Carpi Radialis 5. Flexor Carpi Ulnaris 6. Flexor Retinaculum 7. Flexor Aponeurosis.
A test yourself image of the anterior view of the forearm showing the bony elements and the deeper muscles. The visible structures of the forearm are numbered 1-6. The answers in the box below are as follows 1. Palmaris Longus 2. Flexor Digitorum Superficialis 3. Flexor Carpi Radialis 4. Flexor Carpi Ulnaris 5. Flexor Retinaculum 6. Flexor Aponeurosis.
A test yourself image of the anterior view of the forearm showing the bony elements and the deeper muscles. The visible structures of the forearm are numbered 1-5. The answers in the box below are as follows 1. Palmaris Longus 2. Flexor Carpi Radialis 3. Flexor Carpi Ulnaris 4. Flexor Retinaculum 5. Flexor Aponeurosis.
A test yourself image of the anterior view of the forearm showing the bony elements and the deeper muscles. The visible structures of the forearm are numbered 1-4. The answers in the box below are as follows 1.Palmaris Longus 2. Flexor Carpi Radialis 3. Flexor Retinaculum 4. Flexor Aponeurosis.
A test yourself image of the anterior view of the forearm showing the bony elements and the deeper muscles. The visible structures of the forearm are numbered 1-3. The answers in the box below are as follows 1. Palmaris Longus 2. Flexor Retinaculum 3. Flexor Aponeurosis.
A test yourself image of the anterior view of the forearm showing the bony elements and the attachment of the Flexor Carpi Radialis muscle. Origin at the medial epicondyle of humerus is marked by a red oval. The insertion at the flexor retinaculum and palmar aponeurosis are marked by blue ovals. Transparent Palmaris Longus muscle connects the two attachment sites.
Test yourself while observing the Palmaris Longus muscle
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