Extensor digitorum longus muscle
Updates to Article Attributes
Title
was changed:
Extensor digitorum longus muscle
Body
was changed:
Extensor digitorium longus is a thin muscle situated in the anterior lower leg lateral to extensor hallucis longus which extends the lateral 4 toes.
Summary
-
origin:
anteriorlateral tibial condyle, medial surface of the middle portion of the fibula and superior portion of tha anterior surface of the interosseous membrane -
insertion: dorsal aponeurosis on the dorsal
sidesurface of the proximal phalanges of the 2nd, 3rd, 4th and 5th toes. Each dorsal aponeurosis then divides into a central band and 2 lateral bands:- the central band inserts into the base of the middle phalanx
-
the lateral bands insert into the medial and lateral surfaces of the base of the distal phalanx
of the great toe
-
action: extends the
great toe and assists in dorsiflexionlateral 4 toes - arterial supply: anterior tibial artery
- innervation: deep peroneal nerve
-
antagonist: -
key relationships:
betweentibialis anteriorlateral toextensor hallucis longus and shares a common tendon sheath with peroneus tertius.
Gross anatomy
The muscle divides into 4 distinct tendons above the ankle joint which descend deep to the superior extensor retinaculum . As these tendons pass deep to the inferior extensor retinaculum, they enclosed in a common tendon sheath with peroneus tertius.
-<p><strong>Extensor digitorium longus</strong> is a thin muscle situated in the anterior lower leg lateral to <a title="Extensor hallucis longus" href="/articles/extensor-hallucis-longus-1">extensor hallucis longus</a>.</p><h4>Summary</h4><ul>- +<p><strong>Extensor digitorium longus</strong> is a thin muscle situated in the anterior lower leg lateral to <a href="/articles/extensor-hallucis-longus-1">extensor hallucis longus</a> which extends the lateral 4 toes.</p><h4>Summary</h4><ul>
-<strong>origin</strong>: anterior surface of the middle portion of the <a href="/articles/missing">fibula</a> and the <a href="/articles/missing">interosseous membrane</a>- +<strong>origin</strong>: lateral tibial condyle, medial surface of the middle portion of the <a href="/articles/missing">fibula</a> and superior portion of tha anterior surface of the <a href="/articles/missing">interosseous membrane</a>
-<strong>insertion</strong>: the dorsal side of the base of the distal phalanx of the great toe</li>- +<strong>insertion</strong>: dorsal aponeurosis on the dorsal surface of the proximal phalanges of the 2nd, 3rd, 4th and 5th toes. Each dorsal aponeurosis then divides into a central band and 2 lateral bands:<ul>
- +<li>the <em>central band</em> inserts into the base of the middle phalanx</li>
- +<li>the <em>lateral bands</em> insert into the medial and lateral surfaces of the base of the distal phalanx</li>
- +</ul>
- +</li>
-<strong>action</strong>: extends the great toe and assists in dorsiflexion</li>- +<strong>action</strong>: extends the lateral 4 toes</li>
-<strong>antagonist</strong>:<ul>-<li><a href="/articles/flexor-hallucis-longus">flexor hallucis longus</a></li>-<li><a href="/articles/flexor-hallucis-brevis">flexor hallucis brevis</a></li>-</ul>-</li>-<li>-<strong>key relationships</strong>: between <a href="/articles/tibialis-anterior-muscle">tibialis anterior</a> and <a href="/articles/missing">extensor digitorum longus</a>-</li>-</ul>- +<strong>key relationships</strong>: lateral to<strong> </strong><a href="/articles/extensor-hallucis-longus-1">extensor hallucis longus</a> and shares a common tendon sheath with <a title="Peroneus tertius muscle" href="/articles/peroneus-tertius-muscle">peroneus tertius</a>.</li>
- +</ul><h4>Gross anatomy</h4><p>The muscle divides into 4 distinct tendons above the ankle joint which descend deep to the superior <a title="extensor retinaculum" href="/articles/extensor-retinaculum">extensor retinaculum</a> . As these tendons pass deep to the inferior extensor retinaculum, they enclosed in a common tendon sheath with <a href="/articles/peroneus-tertius">peroneus tertius</a>.</p>
References changed:
- 1. Chummy S. Sinnatamby. Last's Anatomy E-Book. (2011) ISBN: 9780702048395 - <a href="http://books.google.com/books?vid=ISBN9780702048395">Google Books</a>
- 2. Moore KL, Agur AMR, Dalley AF. Clinically oriented anatomy. LWW. ISBN:1451119453. <a href="http://books.google.com/books?vid=ISBN1451119453">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/1451119453">Find it at Amazon</a><span class="auto"></span>
- 2. Moore KL, Agur AMR, Dalley AF. Clinically oriented anatomy. LWW. ISBN:1451119453. <a href="http://books.google.com/books?vid=ISBN1451119453">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/1451119453">Find it at Amazon</a><span class="auto"></span>
- 2. Moore KL, Agur AMR, Dalley AF. Clinically oriented anatomy. LWW. ISBN:1451119453. Read it at Google Books - Find it at Amazon
Systems changed:
- Musculoskeletal
Sections changed:
- Anatomy
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