Lumbrical Muscles of Hand Anatomy: Origin, Insertion, Action

Lumbrical Muscles of Hand Anatomy Study

LLumbrical Muscles of Hand Anatomy Origin: From the tendons of flexor digitorum profundus.
First and second lumbricals: radial sides of the palmar surfaces of the tendons of the second and third digit, respectively.
Third lumbrical: adjacent sides of the tendons of the third and fourth digits.
Fourth lumbrical: adjoining sides of the tendons of the fourth and fifth digits.

Insertion: Each to the radial surface of the extensor apparatus of the same digits as the tendons of origin.
Action:  Flexion of the digits at the metacarpophalangeal joints
Blood Suppy: Deep palmar arch of the radial artery.
Innervation: First and second lumbricals: median nerve (C8, T1). Third and fourth lumbricals: ulnar nerve (C8, T1).

For pain and symptom information see: Lumbrical Muscles of Hand Pain and Symptoms

 

 

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Primary Actions of the Hand Lumbricals:

1. Flexion of the digits at the metacarpophalangeal joints

  • Agonists: Dorsal Interossei, Palmar Interossei, Flexor Digiti Minimi, Flexor Digitorum Superficialis, Flexor Digitorum Profundus
  • Antagonists:  Extensor Digitorum, Extensor Indicis, Extensor Digiti Minimi

Secondary Actions of the Hand Lumbricals:

2. Assists with extension of the digits at the proximal interphalangeal joints

  • Agonists:  Dorsal Interossei, Palmar Interossei, Extensor Digitorum, Extensor Indicis, Extensor Digiti Minimi
  • Antagonists:  Flexor Digitorum Superficialis, Flexor Digitorum Profundus

3. Assists with extension of the digits at the distal interphalangeal joints

  • Agonists:   Dorsal Interossei, Palmar Interossei, Extensor Digitorum, Extensor Indicis, Extensor Digiti Minimi
  • Antagonists:  Flexor Digitorum Profundus

Human Muscle Anatomy

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!

 

Human Anatomy Coloring Book

coloring_book

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.

 

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.

 

 

 

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