pISSN 2093-3665
eISSN 2093-3673
pISSN 2093-3665
eISSN 2093-3673
Characteristics of variants of Gantzer’s muscle: laterality, sex, anatomical and morphological distribution
| Characteristic | ahFPL | ahFDP | |||
|---|---|---|---|---|---|
| P (%) | 95% CI (%) | P (%) | 95% CI (%) | ||
| Laterality | |||||
| Right | 49 | 46–53 | 9 | 5–14 | |
| Left | 45 | 42–49 | 10 | 6–15 | |
| Unilateral | 47 | 43–51 | 8 | 4–16 | |
| Bilateral | 53 | 49–57 | 10 | 6–16 | |
| Sex | |||||
| Male | 38 | 32–44 | 12 | 7–18 | |
| Female | 13 | 8–18 | 23 | 14–36 | |
| Origin | |||||
| Flexor digitorum superficialis | 15 | 13–17 | 74 | 65–82 | |
| CP | 24 | 22–26 | 6 | 3–13 | |
| ME | 37 | 35–40 | 15 | 9–23 | |
| Antebrachial fascia | 4 | 3–5 | NA | NA | |
| Dual origin (CP & ME) | 8 | 7–10 | NA | NA | |
| Pronator teres | NA | NA | 4 | 2–10 | |
| Innervation | |||||
| Anterior interosseous nerve | 66.7 | 64.1–69.3 | 55.6 | 46–65 | |
| Median nerve | 33.2 | 30.6–35.9 | 44.4 | 36–55 | |
| Ulnar nerve | 0.1 | 0.1–0.2 | NA | NA | |
| Morphology | |||||
| Fusiform | 72 | 69–75 | NA | NA | |
| Voluminous | 2 | 1–4 | NA | NA | |
| Slender | 10 | 8–13 | NA | NA | |
| Voluminous & fusiform | 1 | 0–1 | NA | NA | |
| Triangular | 5 | 3–6 | NA | NA | |
| Strap-like | 4 | 3–6 | NA | NA | |
| Papillary like | 6 | 4–8 | NA | NA | |
ahFPL, accessory head of flexor pollicis longus; ahFDP, accessory head of flexor digitorum profundus; P, prevalence; CI, confidence interval; CP, coronoid process of ulna; ME, medial epicondyle of humerus; NA, not applicable.
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