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Titolo:
Characterisation of human knee-joint proprioception by means of a signal-detection theory
Autore:
Weiler, HT; Awiszus, F;
Indirizzi:
Otto von Guericke Univ, Dept Orthopaed, Neuromuscular Res Grp, D-39120 Magdeburg, Germany Otto von Guericke Univ Magdeburg Germany D-39120 9120 Magdeburg, Germany Univ Jena, Dept Child & Adolescent Psychiat, D-07740 Jena, Germany Univ Jena Jena Germany D-07740 dolescent Psychiat, D-07740 Jena, Germany
Titolo Testata:
EXPERIMENTAL BRAIN RESEARCH
fascicolo: 1, volume: 138, anno: 2001,
pagine: 110 - 117
SICI:
0014-4819(200105)138:1<110:COHKPB>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOVEMENT SEQUENCES; POSITION SENSE; MUSCLE-SPINDLE; HUMAN HAND; KINESTHETIC INFORMATION; NERVOUS-SYSTEM; SLOW MOVEMENTS; HUMAN FOREARM; COORDINATION; DISCRIMINATION;
Keywords:
proprioception; decision criterion; movement sense; signal-detection theory; human knee joint;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
57
Recensione:
Indirizzi per estratti:
Indirizzo: Awiszus, F Otto von Guericke Univ, Dept Orthopaed, Neuromuscular Res Grp, Leipziger Str 44, D-39120 Magdeburg, Germany Otto von Guericke Univ Leipziger Str 44 Magdeburg Germany D-39120
Citazione:
H.T. Weiler e F. Awiszus, "Characterisation of human knee-joint proprioception by means of a signal-detection theory", EXP BRAIN R, 138(1), 2001, pp. 110-117

Abstract

Human proprioceptive performance of movement detection in joints is currently believed to be based on information from muscle spindles. In previous studies investigating proprioception, we found remarkable differences in threshold values using a conventional movement-detection paradigm and a threshold-hunting paradigm. One reason could be that central processing, the evaluation of the peripheral sensation, was responsible. Therefore, the study was designed to determine, besides the proprioceptive performance, the central processing of movement detection in the knee joint by means of a signal-detection technique (SDT). Only this technique provides parameters such as detectability (d') and the decision criterion (beta) which distinguish between these performances. From the resulting psychometric functions, the threshold (a parameter of classical psychophysics) also was evaluated. This threshold parameter (PCmax), derived from the SDT parameter d', indicates thatdetection is above threshold when subjects detect only 20-30% of the applied stimuli, as sham stimuli were detected also. The detectability increasedwith increasing velocity and up to a certain value with increasing amplitude. The threshold for movement detection was lower than 0.25 degrees for the three faster angular velocities (0.1 degrees s(-1), 0.5 degrees s(-1), 0.6 degrees s(-1)) and lower than 0.75 degrees for the slowest velocity (0.05degrees s(-1)). The decision criterion beta, a measure for central processing which determines acuity, might re fleet the central processing output on fusimotor neurones and thus be an indirect measure of the gamma -drive evoked by fusimotor neurones.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 08:28:32