Development of the deep flexor tendons and lumbricalis muscle in the hand and foot: a histological study using human mid-term foetuses

• Autorzy: Cho K.H. , Kim J. H. , Murakami G. , Cho B. H. , Abe S.
• Języki publikacji: EN

Abstrakty

EN

To revisit foetal development of the deep flexor tendons of the hand and foot, we examined the paraffin-embedded histology of 20 mid-term foetuses at 8–15 weeks of estimated gestational age (35–118 mm crown-rump length or CRL). At 8–9 weeks, in front of the metacarpal bones, the flexor pollicis longus and flexor digitorum profundus (FDP) muscles provided a plate-like, common tendon from which the lumbricalis muscles originated. However, in the foot, we had no evidence of such a common tendon. The flexor pollicis tendon was separated from the common tendon at 9–10 weeks possibly due to mechanical stress from the laterally growing thumb. Notably, at the lumbricalis muscle origins at 10–12 weeks, the FDP and flexor digitorum longus tendons remained undifferentiated and the primitive tenocytes were dispersed from them. The dispersed cells seemed to develop into an interface tissue between the lumbricalis muscle fibre and the deep tendon. In 3 of 5 specimens at 15 weeks, we found an excess number of the FDP tendons (5–7) in the proximal side of the lumbricalis muscle origin. However, the excess tendons dispersed in the lumbricalis muscle origin. The development of the lumbricalis muscle origin might follow the tendon splitting for four fingers. However, conversely, we hypothesised that the developing lumbricalis muscles re-arranged the deep flexor tendons to provide a configuration of “one deep tendon per one finger (or toe)”. The quadrates plantae muscle seemed not to contribute on the re-arrangement. (Folia Morphol 2012; 71, 3: 154–163)

• Wydawca: -
• Czasopismo: Folia Morphologica
• Rocznik: 2012
• Tom: 71
• Numer: 3
• Opis fizyczny: p.154+163,fig.,ref.

Twórcy

autor

Cho K.H.

• Department of Neurology, Wonkwang University School of Medicine and Hospital, Institute of Wonkwang Medical Science, Jeonbuk Regional Cardiocerebrovascular Disease Centre, Iksan, Korea, 344-2, Sinyong-dong, Iksan, Jeonbuk, 570-711, Republic of Korea

autor

Kim J. H.

• Department of Neurology, Wonkwang University School of Medicine and Hospital, Institute of Wonkwang Medical Science, Jeonbuk Regional Cardiocerebrovascular Disease Centre, Iksan, Korea, 344-2, Sinyong-dong, Iksan, Jeonbuk, 570-711, Republic of Korea

autor

Murakami G.

• Division of Internal Medicine, Iwamizawa Kojin-kai Hospital, Iwamizawa, Japan

autor

Cho B. H.

• Department of Surgery, Chonbuk National University College of Medicine, Jeonju, Korea

autor

Abe S.

• Department of Anatomy and Oral Health Science Centre hrc8, Tokyo Dental College, Chiba, Japan

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