PMID- 10842270
OWN - NLM
STAT- MEDLINE
DCOM- 20000621
LR  - 20190915
IS  - 0148-639X (Print)
IS  - 0148-639X (Linking)
VI  - 23
IP  - 6
DP  - 2000 Jun
TI  - Posture-related changes of soleus H-reflex excitability.
PG  - 925-32
AB  - We investigated whether the modulatory effects of segmental and descending inputs 
      on the soleus H reflex are modified by postural conditions. Fourteen healthy 
      volunteers received a transcranial magnetic stimulus (TMS) or percutaneous 
      electrical stimulation of the posterior tibial nerve (PTN), preceding by 0 to 400 
      ms the elicitation of the soleus H reflex in supine, sitting, and standing 
      positions. In all positions, TMS induced an early period of facilitation at 
      interstimulus intervals (ISIs) ranging between 5 and 35 ms. In supine and sitting 
      positions, there was a second period of facilitation at ISIs between 60 and 90 
      ms, which was absent or significantly reduced in the standing position. PTN 
      induced a strong inhibition of the H reflex in all positions up to 125 ms. In 
      supine and sitting positions, inhibition continued up to 400 ms, whereas it was 
      significantly reduced or completely absent beyond 125 ms in the standing 
      position. These results demonstrate posture-related differences in the modulatory 
      effects of descending and segmental inputs on the excitability of the H-reflex 
      circuit.
CI  - Copyright 2000 John Wiley & Sons, Inc.
FAU - Goulart, F
AU  - Goulart F
AD  - Departament de Medicina, Institut d'Investigacio Biomedica August Pi i Sunyer 
      (IDIBAPS), Facultad de Medicina, Universitat de Barcelona, Villarroel 170, 
      Barcelona 08036, Spain.
FAU - Valls-Sole, J
AU  - Valls-Sole J
FAU - Alvarez, R
AU  - Alvarez R
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Muscle Nerve
JT  - Muscle & nerve
JID - 7803146
SB  - IM
MH  - Adult
MH  - Electric Stimulation
MH  - Female
MH  - H-Reflex/*physiology
MH  - Humans
MH  - *Magnetics
MH  - Male
MH  - Middle Aged
MH  - Muscle, Skeletal/*innervation/*physiology
MH  - Posture/*physiology
MH  - Supine Position
EDAT- 2000/06/08 09:00
MHDA- 2000/06/24 11:00
CRDT- 2000/06/08 09:00
PHST- 2000/06/08 09:00 [pubmed]
PHST- 2000/06/24 11:00 [medline]
PHST- 2000/06/08 09:00 [entrez]
AID - 10.1002/(SICI)1097-4598(200006)23:6<925::AID-MUS13>3.0.CO;2-K [pii]
AID - 10.1002/(sici)1097-4598(200006)23:6<925::aid-mus13>3.0.co;2-k [doi]
PST - ppublish
SO  - Muscle Nerve. 2000 Jun;23(6):925-32. doi: 
      10.1002/(sici)1097-4598(200006)23:6<925::aid-mus13>3.0.co;2-k.