Accessory obturator nerve
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Accessory obturator nerve
| Nerve: Accessory obturator nerve | |
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| Plan of lumbar plexus. (Accessory obturator visible at bottom left.) | |
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| The lumbar plexus and its branches. (Accessory obturator visible at bottom left.) | |
| Latin | n. obturatorius accessorius |
| Gray's | subject #212 955 |
In human anatomy, the accessory obturator nerve is an accessory nerve in the lumbar region present in about 29% of cases.
It is of small size, and arises from the ventral divisions of the third and fourth lumbar nerves. Recent evidence support that this muscle arises from Dorsal divisions.
It descends along the medial border of the psoas major, crosses the superior ramus of the pubis, and passes under the pectineus, where it divides into numerous branches.
One of these supplies the pectineus, penetrating its deep surface, another is distributed to the hip-joint; while a third communicates with the anterior branch of the obturator nerve.
Occasionally the accessory obturator nerve is very small and is lost in the capsule of the hip-joint.
When it is absent, the hip-joint receives two branches from the obturator nerve.
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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 As such, some of the information contained within it may be outdated.
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