Palmaris Longus Muscle
Origin: Medial epicondyle of the humerus via the common flexor tendon
Insertion: Central portion of the flexor retinaculum and superficial portion of the palmar aponeurosis
Actions: Assists with flexion of the wrist
Innervation: Median nerve (C7, C8)
Blood Supply: Muscular branches from the ulnar artery
Primary Actions of the Palmaris Longus
1. Because of the size and location the palmaris longus does not have a primary action.
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Secondary Actions of the Palmaris Longus
1. Assists with flexion of the wrist
Agonists:
- Flexor Carpi Radialis
- Flexor Carpi Ulnaris
Antagonists:
- Extensor Carpi Radialis Longus
- Extensor Carpi Radialis Brevis
- Extensor Carpi Ulnaris
2. Tightens the palmar facsia
Information about cause and effect of palmaris longus: Palmaris Longus Muscle: Pain in the Forearm and Palm Hand Pain
An excellent book for those beginning the study of anatomy. Coloring helps memory retention.
For intermediary anatomy students learning skeletal and muscle structure.
For beginning and intermediary anatomy . Muscle overlays on the human body. Excellent visuals!