title: Postural responses applied in a control model in cochlear implant users with pre-lingual hearing loss.
abstract: Conclusions The assessment of postural responses (PR) based in a feedback control system model shows selective gains in different bands of frequencies adaptable with child development. Objective PR characterization of pre-lingual cochlear implant users (CIU) in different sensory conditions. Methods Total energy consumption of the body's center of pressure signal (ECCOP) and its distribution in three bands of frequencies: band 1 (0-0.1 Hz), band 2 (0.1-0.7 Hz), and band 3 (0.7-20 Hz) was measured in a sample of 18 CIU (8-16 years old) and in a control group (CG) (8-15 years old). They were assessed in a standing position on a force platform in two sensory conditions: 1 = Eyes open. 2 = Eyes closed and standing on foam. Results In condition 1, total ECCOP of PR and its proportion of energy consumption in the three bands of frequencies were similar between CIU and CG (p > 0.05). In condition 2, CIU have significantly higher ECCOP, mainly in high frequencies (bands 2 and 3) (p < 0.05). ECCOP values decreased with age also, mainly in bands 2 and 3. This behavior is interpreted in the control system model proposed as an adaptation process related with child development.
authors.affiliation: a Laboratory of Otoneurology , British Hospital , Montevideo , Uruguay ;
authors.forename: Hamlet
authors.initials: H
authors.lastname: Suarez
authors.affiliation: b Department of Electrical Engineering , Universidad Catolica Del Uruguay , Montevideo , Uruguay ;
authors.forename: Enrique
authors.initials: E
authors.lastname: Ferreira
authors.affiliation: c Department of Quantitative Methods, Facultad De Medicina UDELAR , Montevideo , Uruguay.
authors.forename: Rafael
authors.initials: R
authors.lastname: Alonso
authors.affiliation: a Laboratory of Otoneurology , British Hospital , Montevideo , Uruguay ;
authors.forename: Sofia
authors.initials: S
authors.lastname: Arocena
authors.affiliation: a Laboratory of Otoneurology , British Hospital , Montevideo , Uruguay ;
authors.forename: Cecilia
authors.initials: C
authors.lastname: San Roman
authors.affiliation: a Laboratory of Otoneurology , British Hospital , Montevideo , Uruguay ;
authors.forename: Tamara
authors.initials: T
authors.lastname: Herrera
authors.affiliation: a Laboratory of Otoneurology , British Hospital , Montevideo , Uruguay ;
authors.forename: Valeria
authors.initials: V
authors.lastname: Lapilover
mesh_terms: D000222:Adaptation, Physiological; D000293:Adolescent; D016022:Case-Control Studies; D002648:Child; D002657:Child Development; D003054:Cochlear Implants; D034381:Hearing Loss / Q000503:physiopathology / Q000628:therapy*; D006801:Humans; D008954:Models, Biological; D004856:Postural Balance
keywords: Posture; cochlear implant; postural control model