PMID- 23201255
OWN - NLM
STAT- MEDLINE
DCOM- 20150714
LR  - 20141016
IS  - 1873-7544 (Electronic)
IS  - 0306-4522 (Linking)
VI  - 232
DP  - 2013 Mar 1
TI  - Coordination of the head with respect to the trunk, pelvis, and lower leg during 
      quiet stance after vestibular loss.
PG  - 204-15
LID - S0306-4522(12)01136-0 [pii]
LID - 10.1016/j.neuroscience.2012.11.025 [doi]
AB  - This study examined the relationship between head and trunk sway and between 
      pelvis and leg sway during quiet stance in subjects with long-standing bilateral 
      peripheral vestibular loss (BVLs) comparing these relationships to those of 
      age-matched healthy controls (HCs). All subjects performed three different stance 
      tasks: standing quietly on a firm or foam support surface, with eyes closed (ECF 
      or eyes closed on normal) and on foam with eyes open. Data were recorded with 
      four pairs of body-worn gyroscopes to measure roll and pitch angular velocities 
      at the head, upper trunk, pelvis and lower-leg. These velocities were spectrally 
      analysed and integrated for angle correlation analysis in three frequency bands: 
      below 0.7Hz (low pass, LP), above 3 Hz (high pass, HP) and in between (band pass, 
      BP). For both groups head motion was greater than trunk and pelvis motion except 
      for BVL subjects (BVLs) under ECF conditions. BVLs had greater motion than HCs at 
      all measurement locations for ECF conditions. Angle correlation analysis 
      indicated that the head was almost "locked" to the trunk for BVLs over the LP and 
      BP frequency bands. Head movements for both groups were relatively independent of 
      the trunk in the HP band. Power spectral density ratios, and transfer functions 
      showed a similar result - head relative to trunk movements were less up to 3 Hz 
      in all tests for BVLs. The resonant frequency of head-on-trunk motion was shifted 
      to a higher frequency for BVLs: from 3.2 to 4.3 Hz in pitch, 4.6 to 5.4 Hz in 
      roll. Both groups show greater lower-leg than pelvis motion. These data indicate 
      that during quiet stance BVLs change the characteristics of their head on 
      shoulder motion, reducing relative motion of the head below 3 Hz and increasing 
      head resonant frequency. Presumably these changes are accomplished with increased 
      use of proprioceptive neck reflexes.
CI  - Copyright (c) 2012 IBRO. Published by Elsevier Ltd. All rights reserved.
FAU - Honegger, F
AU  - Honegger F
AD  - Department of ORL, University Hospital Basel, Basel, Switzerland.
FAU - Hubertus, J W
AU  - Hubertus JW
AD  - Department of ORL, University Hospital Basel, Basel, Switzerland.
FAU - Allum, J H J
AU  - Allum JH
AD  - Department of ORL, University Hospital Basel, Basel, Switzerland. Electronic 
      address: jallum@uhbs.ch.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20121129
PL  - United States
TA  - Neuroscience
JT  - Neuroscience
JID - 7605074
SB  - IM
MH  - Adult
MH  - Biomechanical Phenomena
MH  - Female
MH  - *Head/physiopathology
MH  - Humans
MH  - *Leg/physiopathology
MH  - Male
MH  - Middle Aged
MH  - *Pelvis/physiopathology
MH  - *Posture/physiology
MH  - Signal Processing, Computer-Assisted
MH  - *Torso/physiopathology
MH  - Vestibular Diseases/*physiopathology
EDAT- 2012/12/04 06:00
MHDA- 2015/07/15 06:00
CRDT- 2012/12/04 06:00
PHST- 2012/08/16 00:00 [received]
PHST- 2012/11/05 00:00 [revised]
PHST- 2012/11/06 00:00 [accepted]
PHST- 2012/12/04 06:00 [entrez]
PHST- 2012/12/04 06:00 [pubmed]
PHST- 2015/07/15 06:00 [medline]
AID - S0306-4522(12)01136-0 [pii]
AID - 10.1016/j.neuroscience.2012.11.025 [doi]
PST - ppublish
SO  - Neuroscience. 2013 Mar 1;232:204-15. doi: 10.1016/j.neuroscience.2012.11.025. 
      Epub 2012 Nov 29.