The effect of water immersion on short-latency somatosensory evoked potentials in human.

Publisher: BioMed Central Country of Publication: England NLM ID: 100966986 Publication Model: Electronic Cited Medium: Internet ISSN: 1471-2202 (Electronic) Linking ISSN: 14712202 NLM ISO Abbreviation: BMC Neurosci Subsets: MEDLINE

Original Publication: London: BioMed Central, [2000-

Immersion* ; Water*; Evoked Potentials, Somatosensory/*physiology ; Reaction Time/*physiology ; Somatosensory Cortex/*physiology; Adult ; Analysis of Variance ; Electric Stimulation ; Electroencephalography ; Humans ; Male ; Median Nerve/physiology ; Physical Stimulation ; Sensory Thresholds/physiology ; Young Adult

Background: Water immersion therapy is used to treat a variety of cardiovascular, respiratory, and orthopedic conditions. It can also benefit some neurological patients, although little is known about the effects of water immersion on neural activity, including somatosensory processing. To this end, we examined the effect of water immersion on short-latency somatosensory evoked potentials (SEPs) elicited by median nerve stimuli. Short-latency SEP recordings were obtained for ten healthy male volunteers at rest in or out of water at 30 °C. Recordings were obtained from nine scalp electrodes according to the 10-20 system. The right median nerve at the wrist was electrically stimulated with the stimulus duration of 0.2 ms at 3 Hz. The intensity of the stimulus was fixed at approximately three times the sensory threshold.
Results: Water immersion significantly reduced the amplitudes of the short-latency SEP components P25 and P45 measured from electrodes over the parietal region and the P45 measured by central region.
Conclusions: Water immersion reduced short-latency SEP components known to originate in several cortical areas. Attenuation of short-latency SEPs suggests that water immersion influences the cortical processing of somatosensory inputs. Modulation of cortical processing may contribute to the beneficial effects of aquatic therapy.
Trial Registration: UMIN-CTR (UMIN000006492).

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059QF0KO0R (Water)

Date Created: 20120126 Date Completed: 20120608 Latest Revision: 20211021

20250114

PMC3294244

10.1186/1471-2202-13-13

22272934