Effects of homosynaptic depression on spectral properties of H-reflex recordings Public Deposited

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  • The purpose of this study was to determine the effects of homosynaptic depression (HD) on spectral properties of the soleus (SOL) H-reflex. Paired stimulations, separated by 100 ms, were used to elicit an unconditioned and conditioned H-reflex in the SOL muscle of 20 participants during quiet standing. Wavelet and principal component analyses were used to analyze features of the time-varying spectral properties of the unconditioned and conditioned H-reflex. The effects of HD on spectral properties of the H-reflex signal were quantified by comparing extracted principal component scores. The analysis extracted two principal components: one associated with the intensity of the spectra and one associated with its frequency. The scores for both principal components were smaller for the conditioned H-reflex. HD decreases the spectral intensity and changes the spectral frequency of H-reflexes. These results suggest that HD changes the recruitment pattern of the motor units evoked during H-reflex stimulations, in that it not only decreases the intensity, but also changes the types of motor units that contribute to the H-reflex signal.
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  • Kipp K, Johnson ST, Hoffman MA. Effects of homosynaptic depression on spectral properties of Hreflex recordings. Somatosensory & Motor Research. 2012; 29: 38-43. doi:10.3109/08990220.2012.662184
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  • description.provenance : Submitted by Sue Kunda (sue.kunda@oregonstate.edu) on 2012-08-20T20:50:06Z No. of bitstreams: 1 JohnsonSamuelPublicHHSEffectsHomsynapticDepression.pdf: 259325 bytes, checksum: 96cfdbbd78a6c9880cb8006307e3dd0d (MD5)
  • description.provenance : Made available in DSpace on 2012-08-20T21:11:27Z (GMT). No. of bitstreams: 1 JohnsonSamuelPublicHHSEffectsHomsynapticDepression.pdf: 259325 bytes, checksum: 96cfdbbd78a6c9880cb8006307e3dd0d (MD5) Previous issue date: 2012
  • description.provenance : Approved for entry into archive by Sue Kunda(sue.kunda@oregonstate.edu) on 2012-08-20T21:11:27Z (GMT) No. of bitstreams: 1 JohnsonSamuelPublicHHSEffectsHomsynapticDepression.pdf: 259325 bytes, checksum: 96cfdbbd78a6c9880cb8006307e3dd0d (MD5)

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