The vast majority of theses in this collection are open access and freely available. There are a small number of theses that have access restricted to the WWU campus. For off-campus access to a thesis labeled "Campus Only Access," please log in here with your WWU universal ID, or talk to your librarian about requesting the restricted thesis through interlibrary loan.

Date of Award

Spring 2025

Document Type

Masters Thesis

Department or Program Affiliation

Kinesiology

Degree Name

Master of Science (MS)

Department

Health and Human Development

First Advisor

Suprak, David N. (David Nathan)

Second Advisor

San Juan, Jun G.

Third Advisor

Robey, Nathan

Abstract

Research on joint position sense at the shoulder suggests that acuity is affected by factors including muscle activation and external torque. Further research is necessary to determine the effect of starting position on repositioning acuity. The purpose of the current study is to examine the effect of three starting positions (at side (AS), 90º of abduction (Ninety), and full elevation (FE)) on two types of joint repositioning error (vector error and variable error) at four different target positions (50º, 70º, 90º, and 110º of elevation in the scapular plane). Twenty-four healthy participants were recruited for the study. The Pohemus Fastrak 3Space (Colchester, VT) was used with custom LABVIEW software (National Instruments, Austin, TX) to collect kinematic data. Two separate two-factor repeated measures ANOVA tests were run to examine the interaction and main effects of starting position and target position on repositioning error. There was no interaction of starting position and target position and no main effect of starting position on vector error or variable error. There were significant main effects of target position on vector error (p = .004, η2p = 0.175) and variable error (p = .009, η2p = 0.153). Post hoc testing revealed that vector error in the 90° target position was significantly greater than that in the 50° target position (p = .003). The lack of a difference in repositioning error with different starting positions may indicate that information regarding the distance from a starting position to a target position is not heavily relied upon during repositioning.

Type

Text

Keywords

shoulder, proprioception, joint position sense

Publisher

Western Washington University

OCLC Number

1521845611

Subject – LCSH

Shoulder joint; Proprioception; Kinematics

Format

application/pdf

Genre/Form

masters theses

Language

English

Rights

Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this document for commercial purposes, or for financial gain, shall not be allowed without the author’s written permission.

Rights Statement

http://rightsstatements.org/vocab/NKC/1.0/

Download

Included in

Kinesiology Commons

Share

COinS