Illusions of forearm displacement during vibration of elbow muscles in humans.
Position matching ability at the forearm in young adults was measured after arm muscles had been placed in a defined mechanical state, called conditioning. With flexion conditioning, elbow flexors were contracted isometrically with the arm held flexed; with extension conditioning, extensors were contracted with the arm held extended. When both arms were flexion conditioned, vibration of the reference biceps produced significant position matching errors as shown by placement of the indicator arm. When the reference arm was flexion conditioned and the indicator arm extension conditioned, vibration no longer produced significant errors. Vibrating elbow flexors of the indicator arm produced significant illusions in the opposite direction from illusions produced by vibrating flexors of the reference arm. These observations show that in an arm matching task the way in which muscles of both arms are conditioned can have an influence on matching performance, including the ability to indicate a perceived illusion.
White
Olivia
O
Department of Physiology, Monash University, Clayton, VIC, 3800, Australia.
Proske
Uwe
U
D004550:Elbow / Q000502:physiology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D007088:Illusions / Q000502:physiology*; D007537:Isometric Contraction / Q000502:physiology; D007699:Kinesthesis / Q000502:physiology*; D008297:Male; D008465:Mechanoreceptors / Q000502:physiology; D009470:Muscle Spindles / Q000502:physiology; D053580:Muscle Strength / Q000502:physiology; D018482:Muscle, Skeletal / Q000294:innervation / Q000502:physiology*; D010809:Physical Fitness / Q000502:physiology; D014732:Vibration
Brain Res. 1998 Apr 27;791(1-2):167-76
9593876
J Physiol. 2007 Jan 15;578(Pt 2):387-96
17008369
Brain Res. 1973 Oct 26;61:119-31
4272602
J Physiol. 2006 Oct 15;576(Pt 2):445-55
16873408
J Muscle Res Cell Motil. 1999 Aug;20(5-6):433-42
10555062
Brain. 1972;95(4):705-48
4265060
Muscle Nerve. 2007 Jul;36(1):21-9
17471568
J Neurophysiol. 1988 Apr;59(4):1220-30
3373276
J Physiol. 1998 Dec 15;513 ( Pt 3):927-34
9824729
Exp Brain Res. 2000 Aug;133(3):340-8
10958524
Exp Brain Res. 1989;76(1):213-22
2753103
Prog Neurobiol. 1993 Dec;41(6):705-21
8140258
J Neurophysiol. 2005 Sep;94(3):1699-706
15917323
Acta Physiol Scand. 1974 Feb;90(2):319-36
4274638
Brain Res. 1989 Jul 24;493(1):103-12
2775999
J Physiol. 2006 Mar 15;571(Pt 3):703-10
16439427
Muscle Nerve. 2006 Nov;34(5):545-58
16897766
J Physiol. 1995 Nov 1;488 ( Pt 3):833-40
8576873
Q J Exp Physiol. 1988 Jul;73(4):487-500
3174910
J Physiol. 2007 Apr 15;580(Pt. 2):423-34
17255167
J Physiol. 1968 Dec;199(3):637-84
5710425
J Physiol. 2005 Nov 1;568(Pt 3):1035-46
16109730