Comparison of four different nerve conduction techniques of the superficial fibular sensory nerve.

INTRODUCTION: There are many different nerve conduction study (NCS) techniques to study the superficial fibular sensory nerve (SFSN). We present reference distal latency values and comparative data regarding 4 different NCS for the SFSN. METHODS: Four different NCS techniques, Spartan technique, Izzo techniques (medial and intermediate dorsal cutaneous branches), and Daube technique, were performed on (114) healthy volunteers. A total of 108 subjects with 164 legs were included. RESULTS: The mean latency of the Spartan technique was longest (3.9 ± 0.3 ms) while the Daube technique was the shortest (3.6 ± 0.7 ms). The mean amplitude of the Daube technique displayed the highest (15.2 ± 8.2 µV) with the Spartan technique having the lowest (8.7 ± 4.2 µV). Among the absent sensory nerve action potentials (SNAPs), the Spartan technique was absent only twice (1.2%) and the Izzo Medial technique was absent more than the other techniques (2.9%). CONCLUSIONS: All 4 techniques were reliable methods for obtaining the superficial fibular nerve SNAP, present in 95% of individuals. Muscle Nerve 56: 458-462, 2017.

Relationship of spasticity to soft tissue body composition and the metabolic profile in persons with chronic motor complete spinal cord injury.

BACKGROUND/OBJECTIVE: To determine the effects of spasticity on anthropometrics, body composition (fat mass [FM] and fat-free mass [FFM]), and metabolic profile (energy expenditure, plasma glucose, insulin concentration, and lipid panel) in individuals with motor complete spinal cord injury (SCI). METHODS: Ten individuals with chronic motor complete SCI (age, 33 +/- 7 years; BMI, 24 +/- 4 kg/m2; level of injury, C6-T11; American Spinal Injury Association A and B) underwent waist and abdominal circumferences to measure trunk adiposity. After the first visit, the participants were admitted to the general clinical research center for body composition (FFM and FM) assessment using dual energy x-ray absorptiometry. After overnight fasting, resting metabolic rate (RMR) and metabolic profile (plasma glucose, insulin, and lipid profile) were measured. Spasticity of the hip, knee, and ankle flexors and extensors was measured at 6 time points over 24 hours using the Modified Ashworth Scale. RESULTS: Knee extensor spasticity was negatively correlated to abdominal circumferences (r = -0.66, P = 0.038). After accounting for leg or total FFM, spasticity was negatively related to abdominal circumference (r = -0.67, P = 0.03). Knee extensor spasticity was associated with greater total %FFM (r = 0.64; P = 0.048), lower % FM (r = -0.66; P = 0.03), and lower FM to FFM ratio. Increased FFM (kg) was associated with higher RMR (r = 0.89; P = 0.0001). Finally, spasticity may indirectly influence glucose homeostasis and lipid profile by maintaining FFM (r = -0.5 to -0.8, P < 0.001). CONCLUSION: Significant relationships were noted between spasticity and variables of body composition and metabolic profile in persons with chronic motor complete SCI, suggesting that spasticity may play a role in the defense against deterioration in these variables years after injury. The exact mechanism is yet to be determined.

Respiratory measurement utilizing a novel laser displacement technique: normal tidal breathing.

UNLABELLED: A novel technique for achieving plethysmography measurements utilizing noncontact laser displacement sensors is described. This method may have utility in measuring respiratory and pulmonary function similar to that of respiratory inductive plethysmography. The authors describe the apparatus and method and provide results of a validation study comparing respiratory excursion data obtained by (1) the laser sensor technique, (2) standard respiratory inductive plethysmography (RIP), and (3) lung volume measurements determined by pressure variations in a control volume. Six healthy volunteers (five female, one male, ages ranging from 19 to 23 years) were measured for tidal breathing excursions simultaneously via all three measurement techniques. RESULTS: Excellent correlation between the techniques was shown. Pairwise comparisons among all three measurement techniques across all subjects showed intraclass correlation coefficients of 0.995 in each case. These results indicate the laser plethysmograph (LP) system provides results that are, at a minimum, equivalent to those of the RIP at the two sites commonly measured by RIP. Use of the LP system has the potential to provide much more extensive and precise measurements of chest wall function and the respiratory musculature.

Track and field injuries.

OBJECTIVE: A review of the existing literature on injuries to youth (< or =18 years old) in track and field or athletics. DATA SOURCES: Searches of the Medline and SPORT Discus databases for English language articles through the end of 2003, using the search terms (adolescent or youth) and (track or field or running) and injuries. MAIN RESULTS: Only nine prospective or retrospective studies were found dealing with track and field injuries in children and that stated injury rates or provided enough information to allow the estimation of injury rates. Differences in study design and inconsistencies in the definition of a reportable injury provided major hindrances to making comparisons or combining data across studies. Among the few conclusions that can be drawn are that the lower extremities account for the majority of injuries, and muscle strains and ligament sprains are the predominant types of injury. While a majority of injuries may occur during training, since there is much more exposure during training than during competitions, the risk of injury is about four times higher during competitions. CONCLUSIONS: Informed decisions with regard to preventing injuries in youth track and field are dependent upon the quality of the basic epidemiological data available, and at this time such data are, for the most part, nonexistent. Because of the large numbers of participants and the large number and variety of activities involved in track and field, adequately designed epidemiological research is difficult, but opportunities for research in this sport are available for anyone willing to take on the challenge.

Perceived barriers to exercise in people with spinal cord injury.

OBJECTIVE: To identify barriers to physical fitness faced by individuals with spinal cord injury preventing them from participating in a physical fitness program. DESIGN: In this cross-sectional study, a survey of barriers to exercise was administered to 72 individuals with spinal cord injury. RESULTS: Although 73.6% of the participants expressed an interest in an exercise program, less than half (45.8%) were currently active in an exercise program. Less than half (47.2%) reported that their physician had recommended an exercise program for them. The most frequently cited concerns about barriers to exercise fell into three areas: (1) intrapersonal or intrinsic (e.g., lack of motivation, lack of energy, lack of interest), (2) resources (e.g., cost of an exercise program, not knowing where to exercise), and (3) structural or architectural (e.g., accessibility of facilities and knowledgeable instructors). More individuals with tetraplegia reported concerns over exercise being too difficult and that health concerns kept them from exercising. Greater number of concerns was significantly related to higher levels of perceived stress. CONCLUSIONS: People with spinal cord injury face multiple barriers to physical fitness in functional, psychological, and architectural domains. Identification of these barriers can facilitate the participation of individuals with spinal cord injury in an exercise program, improving long-term health and wellness.

Assessment of a holistic wellness program for persons with spinal cord injury.

OBJECTIVE: To test the effectiveness of a holistic (comprehensive and integrated) wellness program for adults with spinal cord injury. DESIGN: A total of 43 adults with spinal cord injury were randomly assigned to intervention or control groups. The intervention group attended six half-day wellness workshops during 3 mos, covering physical activity, nutrition, lifestyle management, and prevention of secondary conditions. Outcome measures included several physical measures and standard psychosocial measures. Statistical analyses included paired t tests, used to determine within-group differences, and multiple regression conducted to assess between-group differences. RESULTS: When comparing within-group baseline and final results, the intervention group reported fewer and less severe secondary conditions by the end of the study. Similarly, significant improvements were found in health-related self-efficacy and health behaviors. No significant changes in physiologic variables were observed. Although no significant between-group differences were observed, regression analyses suggested participation in the wellness program may be associated with improved health behaviors. CONCLUSION: Within-group comparisons suggest improvements in several areas of the participants' overall health behaviors. These findings, although preliminary, emphasize the potential role of health behaviors in positively influencing long-term health outcomes and quality of life.

Two-year prospective study of relative risk of a second cerebral concussion.

OBJECTIVE: To prospectively measure the relative risk of cerebral concussion among those with a history of concussion compared with those having no previous concussions by using a population of high school and college football players. DESIGN: A representative national sample of high school and college football players was followed for two football seasons over a 2-yr period (1997-1998) as part of a national football injury surveillance project. There were a total of 15,304 player-seasons and over 1 million athlete-exposures to the possibility of injury in practices and games; 975 of the player-seasons (6.4%) had a history of concussion in the previous 5 yr. RESULTS: There were 572 concussions recorded, 161 among those with a history (16.5%) and 411 among those with no history (2.9%). Relative risk for individuals with a history of concussion is 5.8 times greater than for individuals with no history (95% confidence interval, 4.8-6.8). CONCLUSION: This large prospective cohort study indicates the risk of sustaining a cerebral concussion is nearly six times greater for individuals with a history of concussion than for individuals with no such history.