Pacinian corpuscle-like structures were identified in the digital tendon sheaths and nail beds of hands obtained from eight of 12 human fetuses of gestational age 20–34 weeks (crown-rump length, 150–290 mm). The aberrant corpuscles were p...
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https://www.riss.kr/link?id=A103065998
Ji Hyun Kim
;
Koichiro Sakanaka
(Tokyo Dental College)
;
Naomitsu Tomita
(Tokyo Dental College)
;
Gen Murakami
(Division of Internal Medicine, Iwamizawa Asuka Hospital, Iwamizawa, Japan)
;
Hiroshi Abe
(Akita University School of Medicine)
;
Shinichi Abe
(Tokyo Dental College)
2017
-
510
KCI등재,ESCI
학술저널
33-40(8쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
Pacinian corpuscle-like structures were identified in the digital tendon sheaths and nail beds of hands obtained from eight of 12 human fetuses of gestational age 20–34 weeks (crown-rump length, 150–290 mm). The aberrant corpuscles were p...
Pacinian corpuscle-like structures were identified in the digital tendon sheaths and nail beds of hands obtained from
eight of 12 human fetuses of gestational age 20–34 weeks (crown-rump length, 150–290 mm). The aberrant corpuscles were present in tight fibrous tissue connecting the flexor tendon sheath to the dorsal aponeurosis (138 corpuscles in the thumbs and all fingers of eight fetuses); loose fibrous tissue inside the sheath on the dorsal side of the tendon (37 corpuscles in the thumbs and all fingers of four fetuses); and the nail bed (10 clusters in the thumbs and second fingers of four smaller fetuses). The aberrant corpuscles in the tendon sheath were classified into two types: thin and short, with tightly packed lamellae, of diameter 20–40 μm and length 20–200 μm; and thick and long, with loosely packed lamellae, of diameter 70–150 μm and length 0.5–1.5 mm. The small corpuscles tended to form clusters, each containing 5–10 structures. Their similarity indicated that the tight and loose lamellae in these two types of corpuscles corresponded to typical immature and mature corpuscles, respectively, usually distributed along the palmar digital nerve. However, mature, large corpuscles were absent from the nail bed, and most aberrant
corpuscles were smaller than typical corpuscles along the nerve. The aberrant corpuscles were apparently incorporated into the tendon sheath or nail bed during fetal vascular development, but they appeared to degenerate after birth due to mechanical stress from the tendon or nail.
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