Obturator nerve

Obturator nerve
Nerve: Obturator nerve
Structures surrounding right hip-joint. (Obturator nerve labeled at upper right.)
Nerves of the right lower extremity. Front view.
Latin nervus obturatorius
Gray's subject #212 953
Innervates medial compartment of thigh
From Lumbar plexus
To posterior branch of obturator nerve, anterior branch of obturator nerve

The obturator nerve in human anatomy arises from the ventral divisions of the second, third, and fourth lumbar nerves; the branch from the third is the largest, while that from the second is often very small.

Contents

Path

It descends through the fibers of the Psoas major, and emerges from its medial border near the brim of the pelvis; it then passes behind the common iliac vessels, and on the lateral side of the hypogastric vessels and ureter, which separate it from the ureter, and runs along the lateral wall of the lesser pelvis, above and in front of the obturator vessels, to the upper part of the obturator foramen.

Here it enters the thigh, through the obturator canal, and divides into an anterior and a posterior branch, which are separated at first by some of the fibers of the Obturator externus, and lower down by the Adductor brevis.

Innervation

The Obturator nerve is responsible for the sensory innervation of the skin of the medial aspect of the thigh.

It is also responsible for the motor innervation of the adductor muscles of the lower extremity (external obturator.[1], adductor longus, adductor brevis, adductor magnus, gracilis) and the pectineus (inconstant). It is, notably, not responsible for the innervation of the obturator internus, despite the similarity in name.[2]

Branches

Additional images

External links

References

  1. ^ Moore, K.L., & Agur, A.M. (2007). Essential Clinical Anatomy: Third Edition. Baltimore: Lippincott Williams & Wilkins. 336. ISBN 978-0-7817-6274-8
  2. ^ Moore, K.L., & Agur, A.M. (2007). Essential Clinical Anatomy: Third Edition. Baltimore: Lippincott Williams & Wilkins. 345. ISBN 978-0-7817-6274-8

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.



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Look at other dictionaries:

  • obturator nerve — n a branch of the lumbar plexus that arises from the second, third, and fourth lumbar nerves and that supplies the hip and knee joints, the adductor muscles of the thigh, and the skin * * * nervus obturatorius …   Medical dictionary

  • Cutaneous branch of the obturator nerve — Nerve: Cutaneous branch of the obturator nerve Nerves of the right lower extremity. Front view. (Cutaneous branch not labeled, but region is visible.) Latin ramus cutaneus nervi obturatorii Gray s …   Wikipedia

  • obturator nerve — noun : a branch of the lumbar plexus arising from the second, third, and fourth lumbar nerves and supplying the hip and knee joints, adductor muscles of the thigh, and skin …   Useful english dictionary

  • Anterior branch of obturator nerve — Infobox Nerve Name = PAGENAME Latin = ramus anterior nervi obturatorii GraySubject = 212 GrayPage = 954 Caption = Nerves of the right lower extremity. Front view. Caption2 = Innervates = BranchFrom = obturator nerve BranchTo = MeshName =… …   Wikipedia

  • Accessory obturator nerve — Infobox Nerve Name = PAGENAME Latin = n. obturatorius accessorius GraySubject = 212 GrayPage = 955 Caption = Plan of lumbar plexus. (Accessory obturator visible at bottom left.) Caption2 = The lumbar plexus and its branches. (Accessory obturator… …   Wikipedia

  • Posterior branch of obturator nerve — Infobox Nerve Name = PAGENAME Latin = ramus posterior nervi obturatorii GraySubject = 212 GrayPage = 954 Caption = Caption2 = Innervates = Adductor magnus muscle BranchFrom = obturator nerve BranchTo = MeshName = MeshNumber = DorlandsPre = r 02… …   Wikipedia

  • obturator nerve accessory — nervus obturatorius accessorius …   Medical dictionary

  • obturator nerve internal — nervus musculi obturatorii interni …   Medical dictionary

  • Nerve to obturator internus — Nerve: Nerve to obturator internus Plan of sacral plexus and pudendal plexus. (Nerve to the Obturator internus and Gemellus superior labeled at lower left.) …   Wikipedia

  • Obturator externus muscle — The obturator externus and nearby hip muscles (posterior view) …   Wikipedia

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