Erik J. Carlson

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BACKGROUND Previous clinical studies have identified the cervical facet joint, including the capsular ligaments, as sources of pain in whiplash patients. The goal of this study was to determine whether whiplash caused increased capsular ligament laxity by applying quasi-static loading to whiplash-exposed and control capsular ligaments. METHODS A total of(More)
BACKGROUND Elongation-induced vertebral artery injury has been hypothesized to occur during non-physiological coupled axial rotation and extension of head. No studies have quantified dynamic vertebral artery elongation during head-turned rear impacts. Therefore, we evaluated effect of rotated head posture vs. forward head posture at the time of impact on(More)
BACKGROUND CONTEXT Elongation-induced vertebral artery (VA) injury has been hypothesized to occur during nonphysiological coupled head motions during automobile impacts. Although previous work has investigated VA elongation during head-turned and head-forward rear impacts, no studies have performed similar investigations for frontal or side impacts. (More)
Background Treatment of scaphoid nonunion is challenging, leading clinicians to pursue innovation in surgical technique and adjunctive therapies to improve union rates. Purpose The purpose of this study was to investigate the use of low-intensity pulsed ultrasound as an adjunctive treatment modality following surgical treatment of scaphoid nonunion in(More)
Rickets, the bone disease classically caused by vitamin D deficiency, was one of the most common diseases of children 100 years ago. It has been recognized as a disease of urban living and linked to issues of race and culture for generations. This paper uses unpublished patient records from 1904 to 1909 and archival and published materials from multiple(More)
BACKGROUND Our goal was to determine 3-dimensional interfragmentary motions due to simulated transverse fracture and volar wedge osteotomy of the scaphoid during physiologic flexion-extension of a cadaveric wrist model. METHODS The model consisted of a cadaveric wrist (n = 8) from the metacarpals through the distal radius and ulna with load applied(More)
STUDY DESIGN Retrospective case series. OBJECTIVE To characterize the clinical utility of imaging in the postanesthesia care unit (PACU) after anterior cervical decompression and fusion (ACDF) procedures. SUMMARY OF BACKGROUND DATA Two sets of imaging are often taken at the end of ACDF procedures: one intraoperatively and the other in the PACU. The(More)
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