Adductor canal: Difference between revisions

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Anatomical illustration of the adductor canal

The adductor canal (also known as the subsartorial canal or Hunter’s canal) is an aponeurotic passage located in the middle third of the thigh. It extends from the apex of the femoral triangle to the adductor hiatus, a gap in the adductor magnus muscle. This canal serves as a conduit for key neurovascular structures as they transition from the anterior thigh to the posterior knee.

Anatomy and Boundaries

The adductor canal is positioned between the anterior compartment of thigh and the medial compartment of thigh. It is bordered by the following structures:

Anteriorly: Covered by the sartorius muscle.
Posteromedially: Bounded by the adductor longus and adductor magnus muscles.
Laterally: Defined by the vastus medialis muscle.

A strong aponeurosis spans the canal, extending from the vastus medialis to the adductor muscles. This aponeurosis plays a protective role for the neurovascular structures passing through.

Contents of the Adductor Canal

The adductor canal contains several key anatomical structures, which include:

Femoral artery – A major arterial supply to the lower limb.
Femoral vein – Returns deoxygenated blood from the lower extremities.
Branches of the femoral nerve:
Saphenous nerve – A sensory nerve supplying the medial leg and foot.
Nerve to the vastus medialis – Provides motor innervation to the vastus medialis muscle.

Openings of the Adductor Canal

The adductor canal has three foramina through which its contents enter and exit:

1. Superior foramen: The femoral artery, femoral vein, and saphenous nerve enter the canal from the femoral triangle.
2. Anterior foramen: The saphenous nerve and descending genicular artery exit by piercing the vastoadductor intermuscular septum.
3. Inferior foramen (adductor hiatus): The femoral artery and femoral vein exit through the space between the oblique and medial heads of the adductor magnus muscle, transitioning into the popliteal artery and popliteal vein.

Function and Clinical Significance

The adductor canal serves as a vital passageway for neurovascular structures as they course from the anterior thigh to the posterior knee. It ensures an uninterrupted supply of blood and innervation to the lower extremity.

Clinical Applications

Adductor Canal Block: A regional anesthesia technique used to provide pain relief for knee surgeries. It targets the saphenous nerve within the adductor canal to reduce post-operative pain without significant motor impairment.
Compression Syndromes: The femoral artery or femoral vein can occasionally become compressed within the adductor canal, leading to vascular insufficiency or deep vein thrombosis.
Peripheral Nerve Pathologies: Injury to the saphenous nerve within the canal may result in numbness or pain along the medial aspect of the lower leg.

Eponym

The adductor canal is also called Hunter’s canal, named after the Scottish surgeon John Hunter (surgeon), who described its anatomical significance.

Additional Images

Adductor canal dissection

Adductor canal dissection
Medial view of the adductor canal

Medial view of the adductor canal

External Links

UltrasoundBlock.com – Adductor Canal Block
Anatomy photo:12:07-0103 at the SUNY Downstate Medical Center - "Anterior and Medial Thigh Region: Sartorius Muscle and the Adductor Canal"
Anatomy photo:12:08-0105 at the SUNY Downstate Medical Center - "Anterior and Medial Thigh Region: Structures of the Adductor Canal"

Gray's Anatomy

Anatomy atlases (external)

[1] - Anatomy Atlases

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-[[File:Gray550.png|Gray's anatomy adductor canal|500px|thumb]]
+[[File:Gray550.png|500px|thumb|Anatomical illustration of the adductor canal]]
-The '''adductor canal''' ('''subsartorial or Hunter’s canal''') is an [[aponeurotic]] tunnel in the middle third of the [[thigh]], extending from the apex of the [[femoral triangle]] to the opening in the [[adductor magnus]], the [[adductor hiatus]].
+The '''adductor canal''' (also known as the '''subsartorial canal''' or '''Hunter’s canal''') is an [[aponeurotic]] passage located in the middle third of the [[thigh]]. It extends from the apex of the [[femoral triangle]] to the [[adductor hiatus]], a gap in the [[adductor magnus]] muscle. This canal serves as a conduit for key neurovascular structures as they transition from the anterior thigh to the posterior knee.
-==Boundary==
+== Anatomy and Boundaries ==
-It courses between the [[anterior compartment of thigh]] and the [[medial compartment of thigh]], and has the following boundaries:
-* Anteriorly - [[Sartorius muscle|sartorius]].
+The adductor canal is positioned between the [[anterior compartment of thigh]] and the [[medial compartment of thigh]]. It is bordered by the following structures:
-* Postermedially - [[adductor longus]] and [[adductor magnus]].
-* Laterally - [[vastus medialis]].
-It is covered in by a strong aponeurosis which extends from the [[vastus medialis]], across the femoral vessels to the [[adductor longus]] and magnus.
+* '''Anteriorly:''' Covered by the [[sartorius]] muscle.
+* '''Posteromedially:''' Bounded by the [[adductor longus]] and [[adductor magnus]] muscles.
+* '''Laterally:''' Defined by the [[vastus medialis]] muscle.
-* Lying on the aponeurosis is the [[Sartorius muscle|sartorius (tailor's) muscle]].
+A strong [[aponeurosis]] spans the canal, extending from the vastus medialis to the adductor muscles. This aponeurosis plays a protective role for the neurovascular structures passing through.
-==Contents==
+== Contents of the Adductor Canal ==
-The canal contains the [[femoral artery]], [[femoral vein]], and branches of the [[femoral nerve]] (specifically, the [[saphenous nerve]], and the [[nerve to the Vastus medialis|nerve to the vastus medialis]]).<ref name="isbn0-7817-5484-4">{{cite book |author=Sauerland, Eberhardt K.; Patrick W., PhD. Tank; Tank, Patrick W. |title=Grant's dissector |publisher=Lippincott Williams & Wilkins |location=Hagerstown, MD |year=2005 |isbn=0-7817-5484-4 |oclc= |doi= |page=128}}</ref> It consists of three foramina: superior, anterior and inferior. The femoral artery with its vein and the saphenous nerve enter this canal through the superior [[foramen]]. Then, the saphenous nerve and artery and vein of genus descendens exit through the anterior foramen, piercing the vastoadductor intermuscular septum. Finally, the femoral artery and vein exit via the inferior foramen (usually called the [[Adductor hiatus|hiatus]]) through the inferior space between the oblique and medial heads of adductor magnus.<ref name="isbn978-5-9704-1207-7">{{cite book |author=А.В. Николаев. |title=Топографическая анатомия и оперативная хирургия. |publisher= [[GEOTAR-Media|ГЭОТАР-Медиа]] |location=Москва |year=2007 |isbn=978-5-9704-1207-7 |oclc= |doi= |pages=174–176}}</ref>
-<!--Commented out: unclear, unref'd "Snell anatomy--it also contains deep lymphatic vessels and terminal part of obturator nerve"-->
-==Eponym==
+The adductor canal contains several key anatomical structures, which include:
-The eponym Hunter’s canal is named for [[John Hunter (surgeon)|John Hunter]].<ref>{{WhoNamedIt|synd|105}}</ref><ref name="titleCHAPTER 15: THE THIGH AND KNEE">{{cite web |url=http://www.dartmouth.edu/~humananatomy/part_3/chapter_15.html#chpt_15_adductor_canal |title=CHAPTER 15: THE THIGH AND KNEE |accessdate=2008-01-27 |format= |work=| archiveurl= http://web.archive.org/web/20080121162834/http://www.dartmouth.edu/~humananatomy/part_3/chapter_15.html| archivedate= 21 January 2008 <!--DASHBot-->| deadurl= no}}</ref>
-==References==
+* '''[[Femoral artery]]''' – A major arterial supply to the lower limb.
-{{reflist}}
+* '''[[Femoral vein]]''' – Returns deoxygenated blood from the lower extremities.
-==Additional Images==
+* '''Branches of the [[femoral nerve]]''':
+* '''[[Saphenous nerve]]''' – A sensory nerve supplying the medial leg and foot.
+* '''[[Nerve to the vastus medialis]]''' – Provides motor innervation to the [[vastus medialis]] muscle.
+=== Openings of the Adductor Canal ===
+The adductor canal has three foramina through which its contents enter and exit:
+* 1. '''Superior foramen:''' The femoral artery, femoral vein, and saphenous nerve enter the canal from the [[femoral triangle]].
+* 2. '''Anterior foramen:''' The [[saphenous nerve]] and [[descending genicular artery]] exit by piercing the vastoadductor intermuscular septum.
+* 3. '''Inferior foramen ([[adductor hiatus]])''': The femoral artery and femoral vein exit through the space between the oblique and medial heads of the [[adductor magnus]] muscle, transitioning into the [[popliteal artery]] and [[popliteal vein]].
+== Function and Clinical Significance ==
+The adductor canal serves as a vital passageway for neurovascular structures as they course from the anterior thigh to the posterior knee. It ensures an uninterrupted supply of blood and innervation to the lower extremity.
+=== Clinical Applications ===
+* '''Adductor Canal Block:''' A regional anesthesia technique used to provide pain relief for knee surgeries. It targets the [[saphenous nerve]] within the adductor canal to reduce post-operative pain without significant motor impairment.
+* '''Compression Syndromes:''' The [[femoral artery]] or [[femoral vein]] can occasionally become compressed within the adductor canal, leading to vascular insufficiency or deep vein thrombosis.
+* '''Peripheral Nerve Pathologies:''' Injury to the [[saphenous nerve]] within the canal may result in numbness or pain along the medial aspect of the lower leg.
+== Eponym ==
+The adductor canal is also called '''Hunter’s canal''', named after the Scottish surgeon [[John Hunter (surgeon)]], who described its anatomical significance.
+== Additional Images ==
 <gallery>
-File:Slide6FFFFF.JPG|Adductor canal
+File:Slide6FFFFF.JPG|Adductor canal dissection
-File:Slide6JJJJ.JPG|Adductor canal
+File:Slide6JJJJ.JPG|Medial view of the adductor canal
 </gallery>
-==External links==
+== See Also ==
-[http://www.ultrasoundblock.com/index.php/ultrasound-regional-anesthesia-nerve-block-ultrasound-ultrasound-guided-nerve-blocks/new-blocks/adductor-canal-block * UltrasoundBlock.com]
+* '''[[Femoral triangle]]'''
+* '''[[Sartorius muscle]]'''
+* '''[[Adductor magnus]]'''
+* '''[[Popliteal artery]]'''
+* '''[[Saphenous nerve]]'''
+== External Links ==
+* [http://www.ultrasoundblock.com/index.php/ultrasound-regional-anesthesia-nerve-block-ultrasound-ultrasound-guided-nerve-blocks/new-blocks/adductor-canal-block UltrasoundBlock.com – Adductor Canal Block]
 * {{SUNYAnatomyLabs|12|07|01|03}} - "Anterior and Medial Thigh Region: Sartorius Muscle and the Adductor Canal"
 * {{SUNYAnatomyLabs|12|08|01|05}} - "Anterior and Medial Thigh Region: Structures of the Adductor Canal"
 {{Gray's}}
 {{Lower limb general}}
 [[Category:Anatomy]]
+[[Category:Lower limb anatomy]]