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The effects of motor imagery on the ...

Hale, Brendon S.

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The effects of motor imagery on the Hoffmann Reflex and presynaptic inhibition.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	The effects of motor imagery on the Hoffmann Reflex and presynaptic inhibition./
Author:	Hale, Brendon S.
Description:	66 p.
Notes:	Adviser: John S. Raglin.
Contained By:	Dissertation Abstracts International68-07B.
Subject:	Biology, Anatomy. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3274271
ISBN:	9780549151456

The effects of motor imagery on the Hoffmann Reflex and presynaptic inhibition.
Hale, Brendon S.

The effects of motor imagery on the Hoffmann Reflex and presynaptic inhibition. - 66 p.

Adviser: John S. Raglin.

Thesis (Ph.D.)--Indiana University, 2007.

Purpose. The purpose of this project was to investigate the effects of mental imagery of a motor task on the H-reflex and on presynaptic inhibition of the H-reflex.

ISBN: 9780549151456Subjects--Topical Terms:

1021727
Biology, Anatomy.

The effects of motor imagery on the Hoffmann Reflex and presynaptic inhibition.
LDR:03129nam 2200325 a 45 001 955094
005 20110622
008 110622s2007 eng d
020 $a 9780549151456
035 $a (UMI)AAI3274271
035 $a AAI3274271
040 $a UMI $c UMI
100 1 $a Hale, Brendon S. $3 1278554
245 1 4 $a The effects of motor imagery on the Hoffmann Reflex and presynaptic inhibition.
300 $a 66 p.
500 $a Adviser: John S. Raglin.
500 $a Source: Dissertation Abstracts International, Volume: 68-07, Section: B, page: 4882.
502 $a Thesis (Ph.D.)--Indiana University, 2007.
520 $a Purpose. The purpose of this project was to investigate the effects of mental imagery of a motor task on the H-reflex and on presynaptic inhibition of the H-reflex.
520 $a Mental imagery of a motor task may influence the amplitude of the Hoffmann reflex (H-reflex) (Hale et al. 2003, Oishi et al. 1995) these investigations have not examined the potential influence that presynaptic inhibition might have on the H-reflex during mental imagery of a motor task.
520 $a Methods. In this study 25 adult participants (M=22.8 years, SD=5.4; 15 Females, 10 Males) were examined on one day of testing. The participants mentally imaged a simple plantar flexion movement of the right foot at two intensities: 20 and 60% of maximum voluntary contraction after completing a series of practice trials of actual contractions at these intensities. Five participants served as control subjects who completed the entire testing protocol but did not perform mental imagery. The dependent measures were peak-to-peak amplitude of the H-reflex and the peak to peak amplitude of the conditioned H-reflex. Data analysis was conducted using a 2X2 ANOVA to determine if any changes in H-reflex amplitude occurred from rest and imagery percentage. Additionally, a One-way ANOVA was conducted to determine if any changes in presynaptic inhibition were noted during the imagery trials.
520 $a Results. Repeated measures ANOVA revealed a significant (p<0.05) condition effect for H-reflex amplitude during imagery trials. Specifically, H-reflex amplitude increased between 6 and 15% during imagery trials above rest. Additionally, a significant (p<0.05) difference was also observed between percent of contraction imagined. A significant (p<0.05) difference was observed in presynaptic inhibition between percent of imagined contraction. Control subjects demonstrated no significant difference for H-reflex or presynaptic inhibition.
520 $a Conclusion. These findings indicate that the amplitude of the H-reflex is increased while performing mental imagery of plantar flexion. Additionally, the measured differences in the conditioned H-reflex indicate that presynaptic inhibition might influence H-reflex response during mental imagery.
590 $a School code: 0093.
650 4 $a Biology, Anatomy. $3 1021727
650 4 $a Psychology, Psychobiology. $3 1017821
690 $a 0287
690 $a 0349
710 2 $a Indiana University. $b School of Health, Physical Education, and Recreation. $3 1278538
773 0 $t Dissertation Abstracts International $g 68-07B.
790 $a 0093
790 1 0 $a Raglin, John S., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3274271