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Distribution of nerve endings in human thumb interphalangeal joint.
Acar, Baver; Unal, Melih; May, Hasan; Ozturk, Serra; Tanriover, Gamze; Sindel, Muzaffer.
Affiliation
  • Acar B; Medical Faculty, Antalya Training and Research Hospital, Department of Orthopedics and Traumatology, University of Health Sciences, Antalya, Turkey.
  • Unal M; Medical Faculty, Antalya Training and Research Hospital, Department of Orthopedics and Traumatology, University of Health Sciences, Antalya, Turkey.
  • May H; Medical Faculty, Antalya Training and Research Hospital, Department of Orthopedics and Traumatology, University of Health Sciences, Antalya, Turkey.
  • Ozturk S; Department of Anatomy, Faculty of Medicine, School of Medicine, Akdeniz University, Antalya, Turkey.
  • Tanriover G; Department of Histology and Embryology, Faculty of Medicine, School of Medicine, Akdeniz University, Antalya, Turkey.
  • Sindel M; Department of Anatomy, Faculty of Medicine, School of Medicine, Akdeniz University, Antalya, Turkey.
J Anat ; 244(3): 468-475, 2024 03.
Article in En | MEDLINE | ID: mdl-37946592
This study aims to quantitatively analyze the distribution of encapsulated nerve endings in the human thumb interphalangeal (IP) joint capsule. There are three types of nerve endings. Type-I nerve endings (Ruffini-like ending) sense pressure changes, Type II (Pacini-like ending) nerve endings contribute to the kinesthetic sense, and Type III (Golgi-like ending) nerve ending provides proprioceptive information. We dissected five right thumbs IP joints from freshly frozen cadavers (5 men). The mean age of the cadavers at the time of death was 63.4 years (55-73). Sections were stained with the hematoxylin-eosin and antiprotein gene product 9.5 (PGP9.5) to identify encapsulated nerve endings. Transverse sections were cut and divided into volar, dorsal, and then into two equal parts, proximal and distal. The density of encapsulated nerve endings compared to volar versus dorsal and proximal versus distal regions was examined. This study showed that type 1 nerve endings were more common in the distal parts of the IP joint (p < 0.05). Also, type 3 nerve endings were observed in the thumb IP joint. There was no difference between regions in type II and type III nerve endings. The current study demonstrates that the distribution of encapsulated nerve endings in the IP joint is different from the PIP and DIP joints. Moreover, further studies are required to understand the thumb's physiology.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Thumb / Mechanoreceptors Limits: Aged / Humans / Male / Middle aged Language: En Journal: J Anat Year: 2024 Type: Article Affiliation country: Turkey

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Thumb / Mechanoreceptors Limits: Aged / Humans / Male / Middle aged Language: En Journal: J Anat Year: 2024 Type: Article Affiliation country: Turkey