Follow and Like Us:

Palmaris Longus Anatomy: Origin, Insertion, Action

Palmaris Longus Origin, Insertion, Actions, Innervation, Vascular Supply

Palmaris Longus

O, I, A of the Palmaris Longus

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: Ventral Primary rami of (T7 to T12)
Vascular Supply: Median nerve (C6, 7)

Primary Actions of the Palmaris Longus:

1. Because of the size and location the palmaris longus does not have a primary action.


Secondary Actions of the Palmaris Longus:

1. Assists with flexion of the wrist


  • Flexor Carpi Radialis
  • Flexor Carpi Ulnaris


  • 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

Recommended Anatomy Books


The Anatomy Coloring Book is one of the best study and reference books for beginning anatomy students. The diagrams are clearly labeled and allow you to see the relationship and placement of the various structures of the body. You will also be surprised how the act of coloring will help with recall. But this is not just a beginners book, it is also great for practitioners and therapists to have on hand to use with clients and patients to use as a visual reference.




Trail Guide To The Body


The Trail Guide To The Body is another excellent book to help you learn the musculature of the human body. Though the book is geared toward massage therapists and physical therapist assistants, the book with its illustrations and text helps anyone gain a thorough understanding of the human musculoskeletal system and movement. I highly recommend this book for anyone studying anatomy and believe that MTs, PTAs, and teachers of body movements should have this book in their possession. I also highly recommend this book for the lay person who wants to gain understanding of the muscle, skeletal system and how our bodies move. This book will not disappoint!



The Trigger Point Therapy Workbook – Claire Davies, Amber Davies, and David G. Simons

Basic Clinical Massage Therapy: Integrating Anatomy and Treatment – James H. Clay and David M. Pounds

Trigger Point Therapy for Myofascial Pain – Donna Finando and Steven Finando