Anatomical variations in the level of bifurcation of the sciatic nerve in Ethiopia

Kiros, Mengstu Desalegn; Woldeyes, Dawit Habte

doi:10.4103/1596-2393.158916

Cited by 8 publications

(8 citation statements)

References 2 publications

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“…SN is formed from the combination of dorsal divisions of L4,5 S1,2 (CPN) with * Prakash et al [9] found bifurcation in lower 1/3rd of thigh in 40.7% and in popliteal fossa in 34.9% which are clubbed in the present classification to 75.6% because these 2 types are same as per present classification. (Group B1 Type 7) ** Kiros & Woldeyes [11] found bifurcation in lower 1/3rd of thigh in 8% and in popliteal fossa in 64% which are clubbed in the present classification to 72% because these 2 types are same as per present classification. (Group B1 Type 7).…”

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confidence: 47%

“…All the drawbacks of the earlier classifications gave us an impetus to formulate a new classification which may take into account all these aspects and simultaneously refer to the relation of SN [4] and Saritha et al [12] found it 82% and 92% respectively which is more than our value of 63.3%. Parkash et al [9] and Kiros and Woldeyes [11] found SN bifurcating in lower 1/ 3rd of thigh in 40.7% and 8% respectively and in the popliteal fossa in 34.9% and 64% respectively. In the present classification these two levels are taken as synonymous so their findings are clubbed to 75.6% and 72% respectively for the two studies under Group B1 Type 7 of present classification.…”

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confidence: 99%

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Different Levels of Bifurcation of Sciatic Nerve: A Novel Classification Based on a Cadaveric Study in Indian Population

Grewal¹,

Singla²,

Singh³

et al. 2016

IJAR

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The Sciatic Nerve (SN) is the largest and thickest nerve in the body. It is composed of two nerves, the common peroneal (CPN) and the tibial (TN) which are bound together by a common sheath of connective tissue from their origin till the bifurcation at the superior angle of popliteal fossa. But this division may occur at any level above this point and rarely below it. These anatomical variations may contribute to clinical conditions such as piriformis syndrome, sciatica, coccygodynia and muscle atrophy. Material and Methods: 30 Lower limbs of 15 cadavers (Male:Female-14:1) were dissected and examined to study the mode and level of bifurcation of SN. Results: The highest incidence of SN bifurcation (63.3%) was observed at superior angle of popliteal fossa followed by division at junction of upper and middle 1/3rd of thigh in 20%, in the pelvis in 10% and in middle 1/ 3rd of thigh in 6.7%. Conclusion: SN bifurcates terminally at different levels for which many classifications have been given. However there are certain over lapping and thus confusions amongst them. Therefore, a new classification termed as Grewal et al classification has been designed and advocated for future studies. It may prove more helpful for anatomists to categorise different levels of bifurcation of SN and for surgeons, orthopaedicians and anaesthetists performing surgeries in the region and giving SN blocks at different levels.

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confidence: 47%

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confidence: 99%

Different Levels of Bifurcation of Sciatic Nerve: A Novel Classification Based on a Cadaveric Study in Indian Population

Grewal¹,

Singla²,

Singh³

et al. 2016

IJAR

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“…Kiros and Woldeyes found Sciatic nerve bifurcating in lower 1/ 3rd of thigh in 40.7% and 8% respectively and at popliteal fossa in 34.9% and 64% respectively. 19 The findings of this study revealed that the division of sciatic nerve in the pelvic region, was observed in 8.33%. This result was different from other similar studies where the magnitudes were 19% of higher observation in Poland.…”

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confidence: 61%

Anatomical study on sciatic nerve variations in Andhra Pradesh, India

Kumari¹,

Sushma²,

Raja³

et al. 2019

Int J Res Med Sci

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Background: The sciatic nerve is the largest and widest nerve in the body and is derived from ventral rami of spinal nerves L2 to S3. Sciatic nerve appears in the Gluteal region below Piriformis from Pelvic cavity by passing through Greater Sciatic foramen. In between the Ischial tuberosity and greater trochanter of Femur, it reaches the back of the thigh. At the superior angle of Popliteal fossa, it divides into Tibial and common Peroneal (fibular) nerves. The division varies, and it may occur within the pelvis, Gluteal, upper, mid and lower part of thigh. The anatomical variations of the level at which the Sciatic nerve divides is considered important by Neurosurgeons, Anaesthetists, Orthopaedicians and Surgeons.Methods: This study was conducted on 52 lower limbs to determine the level of sciatic nerve bifurcation and its variations on 26 embalmed human cadavers. The data was analyzed manually using numbers, frequencies and percentages.Results: The findings of this study states that in 2 limbs (3.84%) the nerve divided in the gluteal region; in 4 limbs (7.69%) in the pelvic region; in 10 limbs (19.23%) at the junction between upper and middle thigh. The highest incidence of division occurs in 36 limbs (69.23%) at the superior angle of the popliteal fossa.Conclusions: The findings of this study revealed that the majority of sciatic nerve divisions occur at the superior angle of popliteal fossa while some divided into other regions such as Pelvis, Gluteal and thigh regions.

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“…Normally, both parts of the nerve, even when already segregated into parts, travel lateral to the ischial tuberosity. Despite the separation around the ischial tuberosity, the distal splitting of the sciatic nerve just inferior to the piriformis is a type C variant in which the nerve divides at the upper part of the posterior compartment of the thigh (12% occurrence), as demonstrated in the study by Kiros and Woldeyes [ 4 ].…”

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confidence: 99%

A Variant of the Sciatic Nerve and its Clinical Implications

Dupont

Unno

Iwanaga

et al. 2018

Cureus

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Variants of gluteal neural anatomy are important to consider, especially during surgical approaches to the hip. During the routine dissection of the gluteal region, a variant of the sciatic nerve was found where the nerve left the pelvis fully split into its tibial and common fibular components. Intrapelvically and extrapelvically, there was no splitting of the two components by the piriformis muscle. Distally, the two parts of the nerve were draped over the medial and lateral edges of the ischial tuberosity. To avoid iatrogenic injury to the sciatic nerve during invasive or surgical approaches to this region, all possible anatomical variations, such as the one presented herein, should be appreciated by the clinician.

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Anatomical variations in the level of bifurcation of the sciatic nerve in Ethiopia

Cited by 8 publications

References 2 publications

Different Levels of Bifurcation of Sciatic Nerve: A Novel Classification Based on a Cadaveric Study in Indian Population

Different Levels of Bifurcation of Sciatic Nerve: A Novel Classification Based on a Cadaveric Study in Indian Population

Anatomical study on sciatic nerve variations in Andhra Pradesh, India

A Variant of the Sciatic Nerve and its Clinical Implications

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