Research Article
Pes Anserinus Structural Framework and Constituting Tendons Are Grossly Aberrant in Nigerian Population
Table 1
Classification (types) of pes anserinus.
| Classification | Classes | Number () | Total (100%) |
| Based on tendinous formation | Type I (SAT + GRT + STT) | 1 | 5% | Type II (SAT + GRT + STT+ aSTT + SMT + TCL) | 1 | 5% | Type III (SAT + GRT + STT + aSTT) | 13 | 65% | Type IV (SAT + GRT + STT + aSTT + SMT) | 3 | 15% | Type V (SAT + STT + GRT + aSAT + SMT) | 1 | 5% | Type VI (SAT + GRT + STT + aGRT + aSTT) | 1 | 5% |
| Based on union of the tendons | Nonconvergence (side-by-side termination) | 2 | 10% | Early convergence (superior to medial tibial condyle) | 1 | 5% | Late convergence (inferior to medial tibial condyle) | 17 | 85% |
| Based on point of insertion | Superior anteromedial tibia | 0 | 0% | Medial border of tibia | 0 | 0% | Superior anteromedial bone + medial border of tibia | 18 | 90% | Superior anteromedial bone + medial border of tibia + fascia cruris | 2 | 10% |
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ā(i) SAT: sartorius muscle tendon. (ii) GRT: gracilis muscle tendon. (iii) STT: semitendinosus muscle tendon. (iv) SMT: semimembranosus muscle tendon. (v) aSAT: accessory sartorius muscle tendon. (vi) aSTT: accessory semitendinosus muscle tendon. (vii) aGRT: accessory gracilis muscle tendon.
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