The sciatic nerve in human cadavers — high division or low formation?

Khan, Ashfaq; Asari, Masao; Pasha, Md. Anwar

doi:10.5603/fm.a2015.0130

Cited by 10 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Studies on 24 Malaysian and 102 American cadavers have reported 83.4% and 88.2% type-a relations and 16.6% and 11.8% type b-f relations, respectively; however, type-d, type-e, and type-f relations were absent, which was also noticed in current study [24,25]. A research on 120 American cadavers detected 97.5% type-a and 2.5% type-b relations, which was almost similar to our study [12].…”

Section: Discussionsupporting

confidence: 75%

Composite Anatomical Variations between the Sciatic Nerve and the Piriformis Muscle: A Nepalese Cadaveric Study

Jha

Baral

2020

Case Reports in Neurological Medicine

View full text Add to dashboard Cite

Piriformis syndrome is a rare syndrome which is one of the main causes of nondiscogenic sciatica causing severe low back pain due to entrapment of sciatic nerve either by the hypertrophy or by inflammation of the piriformis muscle. We have carried out dissection in 20 Nepalese cadavers. Out of 40 dissected gluteal regions, 37 exhibited typical appearance of sciatic nerve, piriformis muscle, and their relations resembling type-a, whereas 3 gluteal regions showed composite structural variations resembling type-b and type-c based on Beaton and Anson’s classification. Knowledge pertaining to such variations will be helpful during a surgical intervention in the gluteal region and in turn reduces the risk of injuring these nerves which are more susceptible to damage. Our study reports such variations in Nepalese population which will be helpful during evaluation of the pain induction in various test positions and also useful for analysis of the range of the neurological deficiency in sciatic nerve neuropathies. The present study also explains the basis of the unsuccessful attempt of the sciatic nerve block during popliteal block anaesthesia.

show abstract

Section: Discussionsupporting

confidence: 75%

Composite Anatomical Variations between the Sciatic Nerve and the Piriformis Muscle: A Nepalese Cadaveric Study

Jha

Baral

2020

Case Reports in Neurological Medicine

View full text Add to dashboard Cite

show abstract

“…of SN, the TN and CFN, develop separately during early embryogenesis as fusions of the dorsal and ventral divisions of the ventral rami of the lower lumbar and sacral spinal nerves [1,2,5,9]. These components maintain their individual identities throughout their development, though they share an epineural sheath to form SN immediately distal to the lumbosacral plexus [1,2,10]. Stochastic and precipitate division of SN into its major components along its course could give rise to the variations observed in SN structure relative to the PM.…”

Section: Fig 2 Classification Of Relationship Of the Piriformis And S...mentioning

confidence: 99%

An Extremely Rare Case of a Sciatic Nerve Variant

et al. 2021

View full text Add to dashboard Cite

The sciatic nerve (SN) is the nerve of the posterior compartment of the thigh and typically traverses beneath the piriformis muscle (PM) before continuing along a vertical course deep to the gluteus maximus and biceps femoris. However, cadaveric studies have often revealed significant variations in the structural features of the SN in relation to the piriformis. Knowledge of such variations is not only useful for clinicians treating pathophysiologies such as piriformis syndrome and sciatica but is also essential for surgeons carrying out procedures involving the hip and sacroiliac joints to avoid iatrogenic injury to the SN. During routine cadaveric dissection, one such anatomical variant was identified with the SN passing over the superior border of the piriformis muscle. To our knowledge, such a variant is exceedingly rare.

show abstract

“…The sciatic nerve may have an iatrogenic injury, with the most frequent mechanisms of intraoperative nerve damage, including stretching and direct injury due to compression or laceration [2,8]. The sciatic nerve can be subjected to traction forces during procedures such as total hip arthroplasty, especially when this procedure is performed via a posterior approach [9]. The sciatic nerve can also be damaged after a traumatic posterior hip dislocation, especially in cases where there is a coexistence of variations in this which likely increases the risk of injury [10].…”

Section: Introductionmentioning

confidence: 99%

An unusual variation in the formation and termination of the sciatic nerve - a case report

Habumuremyi,

Archibong,

Gashegu

2024

rmj

View full text Add to dashboard Cite

The sciatic nerve (SN) presented with unusual patterns in which five smaller fibers instead of one or two nerves at the level of the Piriformis muscle. Those five fibers measured 7.5 cm from their origin to where they joined to form the SN. The SN terminated in the popliteal fossa by giving rise to three terminal branches: the tibial nerve, the common peroneal nerve, and another unusual nerve that supplied the medial head of the gastrocnemius. This case is unusual because the SN presents with different positional variations of its two components in relation to the piriformis muscle but not five fibers; in addition, the SN normally bifurcates instead of trifurcating when it reaches in the popliteal fossa. The case presented a Type A pattern of SN to the piriformis muscle. This type of pattern has been documented to be the most common in some parts of Africa. Some authors have reported two patterns of trifurcation of the SN. One is a pattern where the SN gave rise to the tibial, superficial, and deep peroneal nerves at the popliteal fossa, and another is a trifurcation pattern where it gave rise to the tibial, common peroneal, and sural nerves. The case is different as it presents an unusual unreported pattern where the SN trifurcates by giving rise to the tibial, common peroneal, and nerve that supplies the medial head of the gastrocnemius muscle. The current variation has never been reported elsewhere.

show abstract

The sciatic nerve in human cadavers — high division or low formation?

Abstract: Variations of the sciatic nerve have been extensively studied in the past (Folia Morphol 2016; 75, 3: 306-310)

Cited by 10 publications

References 18 publications

Composite Anatomical Variations between the Sciatic Nerve and the Piriformis Muscle: A Nepalese Cadaveric Study

Composite Anatomical Variations between the Sciatic Nerve and the Piriformis Muscle: A Nepalese Cadaveric Study

An Extremely Rare Case of a Sciatic Nerve Variant

An unusual variation in the formation and termination of the sciatic nerve - a case report

Contact Info

Product

Resources

About