Deep Dissection Of The Gluteal Region With Multiple Muscle And Nerve Variations And A Brief Literature Review
Bibliographic record
Abstract
The anatomy of the gluteal region is prone to numerous variations that can significantly impact the biomechanics of the hip joint and influence clinical presentation and therapeutic solutions. This case report documents a routine dissection of the right gluteal region performed on a 73-year-old male cadaver, which revealed six muscle variations and two nerve variations. The left gluteal region was unremarkable. The cadaveric-based work was supplemented by a brief literature review to contextualize these findings within the broader anatomical landscape. T he muscle variations were: gluteus medius with two distinct parts, anterior and posterior, each part with a distinct insertion on the greater trochanter; piriformis muscle with two distinct bellies, superior and inferior, separated by the common fibular division of sciatic nerve, with each muscle belly having a distinct tendon and insertion; absence of superior gemellus; an enlarged obturator internus tendon; and quadratus femoris muscle with a serrated and broadened appearance. Additionally, the posterior cutaneous nerve of the thigh had two trunks that originated from the common fibular and tibial divisions of sciatic nerve, respectively. While anatomical variations in the deep gluteal region are well documented, the presented case is unique due to the abundance of muscle and nerve variations, all co-existing together. T his case report adds to the body of literature on the significance of anatomical variations in the deep gluteal region and their clinical implications.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.006 | 0.004 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".