title: Sympathetic influence on biomechanical skin properties after spinal cord injury.
abstract: METHODS
  Case-control study.
  
  
  OBJECTIVE
  To investigate changes of biomechanical skin properties and their relationship with paralysis following spinal cord injury (SCI).
  
  
  METHODS
  South Korea.
  
  
  METHODS
  A total of 48 male subjects with chronic SCI and 48 age-matched healthy controls were enrolled into this study. The C4 shoulder group and L2 thigh group were prescribed by two measured anatomical regions that represented the C4 and L2 American Spinal Injury Association sensory dermatomes. Each anatomical group was comprised of one control subgroup and three SCI subgroups determined by sympathetic paralysis at the measured region and somatic completeness. The following biomechanical skin properties were compared between the subgroups in each anatomical group by using Cutometer, a non-invasive suction device: distensibility (Uf), elasticity (Ua/Uf and Ur/Uf) and viscoelasticity (Uv/Ue and H). The impact of sympathetic and somatic sensory paralysis, somatic completeness, age, smoking, body mass index and duration of injury on the indices of skin properties were analyzed.
  
  
  RESULTS
  In each anatomical group, sympathetic paralyzed subgroups regardless of somatic sensory completeness showed lower value of skin distensibility (Uf), and higher values of elasticity (Ua/Uf and Ur/Uf) and viscoelasticity (Uv/Ue and H), compared with other subgroups. Age and duration of injury had significant impact on biomechanical skin properties.
  
  
  CONCLUSIONS
  The non-invasive suction method is useful for quantitative evaluation of skin affected by SCI. In chronic SCI patients, biomechanical skin properties are significantly altered in the skin with sympathetic paralysis rather than somatic sensory paralysis.
authors.affiliation: Department of Physical Medicine & Rehabilitation, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, South Korea. spotdoc88@gmail.com
authors.forename: J W
authors.initials: JW
authors.lastname: Park
authors.forename: C H
authors.initials: CH
authors.lastname: Seo
authors.forename: S H
authors.initials: SH
authors.lastname: Han
authors.forename: Y G
authors.initials: YG
authors.lastname: Lee
mesh_terms: D000328:Adult; D000368:Aged; D001342:Autonomic Nervous System Diseases / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology*; D001696:Biomechanical Phenomena / Q000502:physiology; D016022:Case-Control Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D012867:Skin / Q000294:innervation / Q000503:physiopathology*; D013119:Spinal Cord Injuries / Q000150:complications / Q000503:physiopathology*; D055815:Young Adult