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Flexor Digitorum Longus Anatomy: Origin, Insertion, Action and Innervation

Flexor Digitorum Longus Anatomy Study

Flexor Digitorum Longus Muscle
Origin: Posterior surface of the tibia, just below the soleal line to within 7 or 8 cm of the distal end of the bone, and to the medial part of the fascia covering the tibialis posterior
Insertion: Plantar surfaces of the bases of the distal phalanges of the four lateral toes
Action: Flexion of the four lateral toes, assists with plantarflexion of the foot at the ankle.
Innervation: Tibial nerve (L5 – S1-2 )
Blood Supply: Posterior tibial artery

Synergist: Flexor hallucis longus, Peroneus longus and brevis, Gastrocnemius,  Tibialis posterior, Soleus, Plantaris
Antagonist: Extensor digitorum longus, Extensor hallucis longus,  Tibialis anterior, Peroneus tertius

For Flexor Digitorum Longus Pain and Symptom information see: Flexor Digitorum Longus: Foot and Toe Pain

 

Primary Actions of the Flexor Digitorum Longus

1. Flexion of the four lateral toes at the proximal interphalangeal joints

    • Agonists: Flexor Digitorum Brevis
    • Antagonists: Extensor Digitorum Longus, Extensor Digitorum Brevis

2. Flexion of the four lateral toes at the metatarsophalangeal joints

    • Agonists: Flexor Digitorum Brevis, Flexor Digiti Minimi
    • Antagonists: Extensor Digitorum Longus, Extensor Digitorum Brevis

3. Flexion of the four lateral toes at the distal interphalangeal joints

    • Angonists: None
    • Antagonists: Extensor Digitorum Longus

Secondary Actions of the Flexor Digitorum Longus:

1. Assists with plantar flexion of the foot at the ankle

    • Agonists: Gastrocnemius, Soleus
    • Antagonists: Tibialis Anterior

Recommended Human Anatomy Books

 

Basic Clinical Massage Therapy

basic_clinical_massa

Out of the scores of books in my office Basic Clinical Massage Therapy is by far the most referenced book in my library. The musculoskeletal system is overlaid on human models allowing you to learn the precise location, origin and insertions of each muscle. The models are pictured in various poses throughout the book which also helps you visualize muscles in motion and their actions relationship with the skeletal structure and other muscles. Though it is written for massage therapists, it is an excellent book for anyone who wants to learn about the muscular system. MT’s will benefit from recommended treatments for each muscle.

Trail Guide To The Body

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!

 

References:

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

Massage Therapy Principles and Practice – Susan Salvo

Theory & Practice of Therapeutic Massage – Mark Beck

 

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