The effect of wrist position on the relative motion of tendon, nerve, and subsynovial connective tissue within the carpal tunnel in a human cadaver model

Yuichi Yoshii, Chunfeng D Zhao, Kristin D Zhao, Mark E. Zobitz, Kai Nan An, Peter C Amadio

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The purpose of this study was to measure the effect of wrist position on the relative motion of the middle finger flexor digitorum superficialis (FDS) tendon, subsynovial connective tissue (SSCT), median nerve, and flexor retinaculum during simulated active finger motion. The relative motion of each tissue was measured by fluoroscopy in 10 human cadavers. Measurements were obtained for wrist positions of neutral (0 degree extension), 30 and 60 degrees of flexion, and 30 and 60 degrees of extension. The shear strain index (SSI) was defined as the difference in motion between two tissues (tendon, SSCT, or nerve) divided by tendon excursion, expressed as a percentage. The motion of the tendon, SSCT, and nerve in the 60 degree flexed position was significantly less than the motion in all other wrist positions (p ≤ 0.001). The SSI at 60 degrees of flexion for tendon - SSCT and tendon - nerve were significantly increased compared with all other positions (p ≤ 0.001). Because the SSCT and tendon are physically connected, a decrease in SSCT motion relative to the tendon would increase the shear strain on the SSCT with tendon motion. Thus, this result suggests that the SSCT may be predisposed to shear injury from activity done in 60 degrees of wrist flexion.

Original languageEnglish (US)
Pages (from-to)1153-1158
Number of pages6
JournalJournal of Orthopaedic Research
Volume26
Issue number8
DOIs
StatePublished - Aug 2008

Fingerprint

Wrist
Cadaver
Tendons
Connective Tissue
Fingers
Median Nerve
Fluoroscopy
Wounds and Injuries

Keywords

  • Carpal tunnel
  • Flexor tendon
  • Fluoroscopy
  • Human cadaver
  • Kinematic
  • Median nerve
  • Subsynovial connective tissue (SSCT)

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

@article{45ca4cc998404880a1fc457d9d986938,
title = "The effect of wrist position on the relative motion of tendon, nerve, and subsynovial connective tissue within the carpal tunnel in a human cadaver model",
abstract = "The purpose of this study was to measure the effect of wrist position on the relative motion of the middle finger flexor digitorum superficialis (FDS) tendon, subsynovial connective tissue (SSCT), median nerve, and flexor retinaculum during simulated active finger motion. The relative motion of each tissue was measured by fluoroscopy in 10 human cadavers. Measurements were obtained for wrist positions of neutral (0 degree extension), 30 and 60 degrees of flexion, and 30 and 60 degrees of extension. The shear strain index (SSI) was defined as the difference in motion between two tissues (tendon, SSCT, or nerve) divided by tendon excursion, expressed as a percentage. The motion of the tendon, SSCT, and nerve in the 60 degree flexed position was significantly less than the motion in all other wrist positions (p ≤ 0.001). The SSI at 60 degrees of flexion for tendon - SSCT and tendon - nerve were significantly increased compared with all other positions (p ≤ 0.001). Because the SSCT and tendon are physically connected, a decrease in SSCT motion relative to the tendon would increase the shear strain on the SSCT with tendon motion. Thus, this result suggests that the SSCT may be predisposed to shear injury from activity done in 60 degrees of wrist flexion.",
keywords = "Carpal tunnel, Flexor tendon, Fluoroscopy, Human cadaver, Kinematic, Median nerve, Subsynovial connective tissue (SSCT)",
author = "Yuichi Yoshii and Zhao, {Chunfeng D} and Zhao, {Kristin D} and Zobitz, {Mark E.} and An, {Kai Nan} and Amadio, {Peter C}",
year = "2008",
month = "8",
doi = "10.1002/jor.20640",
language = "English (US)",
volume = "26",
pages = "1153--1158",
journal = "Journal of Orthopaedic Research",
issn = "0736-0266",
publisher = "John Wiley and Sons Inc.",
number = "8",

}

TY - JOUR

T1 - The effect of wrist position on the relative motion of tendon, nerve, and subsynovial connective tissue within the carpal tunnel in a human cadaver model

AU - Yoshii, Yuichi

AU - Zhao, Chunfeng D

AU - Zhao, Kristin D

AU - Zobitz, Mark E.

AU - An, Kai Nan

AU - Amadio, Peter C

PY - 2008/8

Y1 - 2008/8

N2 - The purpose of this study was to measure the effect of wrist position on the relative motion of the middle finger flexor digitorum superficialis (FDS) tendon, subsynovial connective tissue (SSCT), median nerve, and flexor retinaculum during simulated active finger motion. The relative motion of each tissue was measured by fluoroscopy in 10 human cadavers. Measurements were obtained for wrist positions of neutral (0 degree extension), 30 and 60 degrees of flexion, and 30 and 60 degrees of extension. The shear strain index (SSI) was defined as the difference in motion between two tissues (tendon, SSCT, or nerve) divided by tendon excursion, expressed as a percentage. The motion of the tendon, SSCT, and nerve in the 60 degree flexed position was significantly less than the motion in all other wrist positions (p ≤ 0.001). The SSI at 60 degrees of flexion for tendon - SSCT and tendon - nerve were significantly increased compared with all other positions (p ≤ 0.001). Because the SSCT and tendon are physically connected, a decrease in SSCT motion relative to the tendon would increase the shear strain on the SSCT with tendon motion. Thus, this result suggests that the SSCT may be predisposed to shear injury from activity done in 60 degrees of wrist flexion.

AB - The purpose of this study was to measure the effect of wrist position on the relative motion of the middle finger flexor digitorum superficialis (FDS) tendon, subsynovial connective tissue (SSCT), median nerve, and flexor retinaculum during simulated active finger motion. The relative motion of each tissue was measured by fluoroscopy in 10 human cadavers. Measurements were obtained for wrist positions of neutral (0 degree extension), 30 and 60 degrees of flexion, and 30 and 60 degrees of extension. The shear strain index (SSI) was defined as the difference in motion between two tissues (tendon, SSCT, or nerve) divided by tendon excursion, expressed as a percentage. The motion of the tendon, SSCT, and nerve in the 60 degree flexed position was significantly less than the motion in all other wrist positions (p ≤ 0.001). The SSI at 60 degrees of flexion for tendon - SSCT and tendon - nerve were significantly increased compared with all other positions (p ≤ 0.001). Because the SSCT and tendon are physically connected, a decrease in SSCT motion relative to the tendon would increase the shear strain on the SSCT with tendon motion. Thus, this result suggests that the SSCT may be predisposed to shear injury from activity done in 60 degrees of wrist flexion.

KW - Carpal tunnel

KW - Flexor tendon

KW - Fluoroscopy

KW - Human cadaver

KW - Kinematic

KW - Median nerve

KW - Subsynovial connective tissue (SSCT)

UR - http://www.scopus.com/inward/record.url?scp=49149120854&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=49149120854&partnerID=8YFLogxK

U2 - 10.1002/jor.20640

DO - 10.1002/jor.20640

M3 - Article

VL - 26

SP - 1153

EP - 1158

JO - Journal of Orthopaedic Research

JF - Journal of Orthopaedic Research

SN - 0736-0266

IS - 8

ER -