Morphological structure and variations of lumbar plexus in human fetuses

Yaşar, Soner; Kaya, Serdar; Temız, Cüneyt; Tehli, Özkan; Kural, Cahit; İzci, Yusuf

doi:10.1002/ca.22111

Cited by 13 publications

(5 citation statements)

References 6 publications

(7 reference statements)

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“…[10,28] Howell [28] also asserted that when the pubis develops around the obturator nerve, thus separating it from the AON. Yasar et al [29] reported an AON in four of 20 lumbar plexuses in 10 fetuses between the gestational ages of 24 and 28 weeks. Woodburne [10] described the pectineus as a "border muscle" in embryological development.…”

Section: Anatomymentioning

confidence: 99%

The accessory obturator nerve: an anatomical study with literature analysis

Turğut¹,

Protas²,

Gardner³

et al. 2017

Anatomy

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The accessory obturator nerve (AON) (Figure 1) was first described in 1672 by Isbrand van Diemerbroeck. [1] He reported that it was found in roughly one out of every three persons and originated from the third and fourth lumbar nerves. [1] Not until 1794 was it described in detail by Schmidt (1794). Since its discovery, it has been called the anterior internal crural nerve, accessory nerve of the internal crural nerve, and the nerve of the coxo-femoral articulation. [2] Some have proposed that it should be named the accessory femoral nerve owing to its typical derivation from the posterior part of the anterior division of L3 and L4, its function, and its anatomicalcourse over the pubic ramus. [3] The lumbar plexus is derived from the ventral rami of L1-L4, often with a contribution from T12. [4] The obturator nerve is most commonly derived from the L2 to L4 ventral rami. [4] The AON is described in Katritsis et al. [5] as being derived from the posterior part of the anterior division of L3 and L4. Typically, the AON passes alongside the obturator nerve toward the obturator foramen. Instead of passing through this foramen, it passes over it. There are multiple variationsof the terminal branches of the AON after it passes over the superior pubic ramus (Tables 1-3). [5-16] Knowledge of the AON and its variations can be important to surgeons, especially regarding anterior and lateral approaches to the spine. [17-19] Misidentification of the nerve can also lead to injury. [20]

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Section: Anatomymentioning

confidence: 99%

The accessory obturator nerve: an anatomical study with literature analysis

Turğut¹,

Protas²,

Gardner³

et al. 2017

Anatomy

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“…Variations in the normal anatomy of the lumbar and sacral plexus might be seen in some cases and are reported in the literature, but finding such an unusual case comprising of multiple variations which is normally not expected in a clinical setup, proves to be a vital piece of information for clinicians and medical practitioners. Single nerve variations in the lumbar plexus formation have been reported (JAMIESON, 1903;WEBBER, 1961;MORIKAWA, 1971;ANLOAGUE and HUIJBREGTS, 2009;YASAR, KAYA, TEMIZ et al, 2014) to be of rare occurrence and having multiple variations such as the one presented here is one of the rarest and adds up a prime level of knowledge on the possibilities of variations which could be seen in this region.…”

Section: Discussionmentioning

confidence: 59%

An extensive study and review of literature about multiple variations of the lumbar plexus

Nayak¹,

Surendran²,

Reghunathan³

et al. 2017

J Morphol Sci

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Introduction: Lumbar plexus involves the L1 -L5 spinal segments for the formation of the nerves which supply parts of the abdominal wall, pelvis and the upper part of the thigh (both sensory and motor). Our aim in this study was to compile all the rare variations found in a single cadaver, which is of the rarest possible kind. Methods: During the dissection of the abdomen and pelvis in approximately 70 year old cadaver, there were multiple variations observed in the anatomy of the lumbar plexus. The entire region was cleaned for visibility of the variations and all those were clearly documented for compiling purpose. Results: The following variations in the formation of the lumbar and sacral nerves were observed. 1. The genitofemoral nerve bifurcated at a higher level; genital branch of genitofemoral nerve gave branches to the anterior abdominal wall muscles, 2. A communicating branch was given from the lateral cutaneous nerve of thigh to the medial cutaneous nerve of thigh, 3. A muscular branch was given from femoral nerve to psoas major, 4. There was absence of contribution of L4 spinal nerve in the formation of the lumbosacral trunk, and 5. Lumbosacral trunk gave communicating branches to the femoral and obturator nerves. Most of the variations found were rare and finding all the above said variations in a single cadaver is even rare. Conclusion: Knowledge of the normal anatomy and any possible variations would help the clinicians and surgeons dealing with this region and avoid possible complications beforehand.

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“…In the available sources there is practically no information about the fetal topography of the vessels and nerves of the muscles of the lower extremities, and in particular of the thigh. This study is a continuation of our earlier research on blood supply and innervation of the muscles of the lower limb [13][14][15][16] . All these indicate that the study of the intramuscular distribution of nerves and arteries in the muscles of the thigh in human fetuses is an important task not only for fetal anatomy, but also for perinatal medicine in general.…”

Section: Fetal Topography Of Arteries and Nerves Of Muscles Of The Mementioning

confidence: 61%