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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Grip and load force control and coordination in object manipulation during a night of sleep deprivation

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Pedao, Sabrina Tiago [1] ; Aguiar, Stefane Aline [1] ; Cunha, Bianca Pinto [1] ; de Freitas, Paulo Barbosa [1]
Total Authors: 4
[1] Univ Cruzeiro Sul, Inst Phys Act & Sport Sci, Grad Program Human Movement Sci, BR-01506000 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: SLEEP AND BIOLOGICAL RHYTHMS; v. 13, n. 2, p. 163-171, APR 2015.
Web of Science Citations: 2

Although sleep deprivation causes deficits in the performance of several sensorimotor tasks, its effects on object manipulation are underexplored. To investigate the possible effects of sleep deprivation on the control of object manipulation we assessed the relationship between the force components acting on the digits-object interaction (i.e. grip force {[}GF] and load force {[}LF]) during two simple manipulation tasks. Sixteen young adults performed two manipulation tasks five times along one night of sleep deprivation, at 23:00, 01:00, 03:00, 05:00, and 07:00h. In the first task (i.e. holding), participants were asked to hold an instrumented object, as still as possible, during 12s. In the second task (i.e. shaking), they were instructed to continuously oscillate the object upward and downward at two frequencies, 0.8Hz and 1.2Hz. The results revealed that individuals who remained sleep deprived decreased linearly the amount of GF exerted while holding the object still as the night progressed. Also, results revealed that during the shaking task the GF-LF coordination and GF control were negatively affected at 03:00. These results indicate that during the holding task GF control is strongly affected by time awake and that during the shaking, a dynamic task, circadian variations play a major role. These changes could be detrimental to work-related manipulation tasks. (AU)

FAPESP's process: 10/02939-4 - Hand function in neuropathic diabetic patients: control and coordination of forces acting on the digits-object interaction in manipulation tasks
Grantee:Paulo Barbosa de Freitas Júnior
Support type: Regular Research Grants
FAPESP's process: 12/24426-4 - Hand function in post-stroke individuals: effect of lesion side
Grantee:Bianca Pinto Cunha
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 11/16016-8 - Sleepness effects in the sensory-motor coupling in adults
Grantee:Stefane Aline Aguiar
Support type: Scholarships in Brazil - Master