0000000000759799

AUTHOR

Santtu Seipäjärvi

showing 3 related works from this author

Cortical Proprioceptive Processing Is Altered by Aging

2018

Proprioceptive perception is impaired with aging, but little is known about aging-related deterioration of proprioception at the cortical level. Corticokinematic coherence (CKC) between limb kinematic and magnetoencephalographic (MEG) signals reflects cortical processing of proprioceptive afference. We, thus, compared CKC strength to ankle movements between younger and older subjects, and examined whether CKC predicts postural stability. Fifteen younger (range 18-31 years) and eight older (66-73 years) sedentary volunteers were seated in MEG, while their right and left ankle joints were moved separately at 2 Hz (for 4 min each) using a novel MEG-compatible ankle-movement actuator. Coherence…

Agingmedicine.medical_treatmentproprioceptiontasapainoSomatosensorySomatosensory systemCortical processing0302 clinical medicineMedicinesensorimotor integrationta315Passive movementsensorimotor cortexta515Original ResearchRehabilitation05 social sciencesSensorimotor cortexmedicine.anatomical_structurePostural stabilitypassive movementCoherenceBalancemedicine.medical_specialtyCognitive NeuroscienceSensorimotor integrationta3112koherenssi050105 experimental psychologylcsh:RC321-571somatosensory03 medical and health sciencesPhysical medicine and rehabilitationsensorisen integraation terapia0501 psychology and cognitive scienceslcsh:Neurosciences. Biological psychiatry. NeuropsychiatryBalance (ability)Proprioceptionbusiness.industryagingbalanceProprioceptioncoherenceaivokuoriikääntyminenageingAnklebusiness030217 neurology & neurosurgeryLeft ankleNeuroscienceFrontiers in Aging Neuroscience
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Reproducibility of evoked and induced MEG responses to proprioceptive stimulation of the ankle joint

2022

Cortical processing of proprioceptive afference can be investigated by examining phase locked evoked and induced responses in cortical signals to passive movement stimuli. Reproducibility of evoked and induced responses has been studied using electroencephalography (EEG), but proprioceptive domain has received little attention. It is unclear whether evoked and induced responses to proprioceptive stimulation arising from the lower limbs are reproducible using magnetoencephalography (MEG). Nineteen healthy volunteers (18 right-foot dominant, 36.1 ± 6.6 yr, 7 females) were measured in two MEG sessions separated by 9 ± 5 days in which their right ankle was rotated intermittently using a pneumat…

magnetoencephalographyevent-related synchronizationreliabilityMEGliikeaistitoistettavuustemporal spectral evolutionGeneral Engineeringbeta modulationtutkimusmenetelmätGeneral Earth and Planetary SciencesGeneral Environmental Scienceevent-related desynchronizationmotoriikkareliabiliteetti
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Reliability and Sensitivity of Nocturnal Heart Rate and Heart-Rate Variability in Monitoring Individual Responses to Training Load

2022

Purpose: To assess the reliability of nocturnal heart rate (HR) and HR variability (HRV) and to analyze the sensitivity of these markers to maximal endurance exercise. Methods: Recreational runners recorded nocturnal HR and HRV on nights after 2 identical low-intensity training sessions (n = 15) and on nights before and after a 3000-m running test (n = 23). Average HR, the natural logarithm of the root mean square of successive differences (LnRMSSD), and the natural logarithm of the high-frequency power (LnHF) were analyzed from a full night (FULL), a 4-hour (4H) segment starting 30 minutes after going to sleep, and morning value (MOR) based on the endpoint of the linear fit through all 5-m…

recoverysykeendurance trainingkestävyysharjoittelupalautuminenrecovery monitoringautonomic nervous systemautonominen hermostoluotettavuusparasympathetic nervous systemmittausmenetelmät
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