STUDY DESIGN Retrospective interventional study. PURPOSE To introduce a free-hand pedicle screw (PS) insertion technique without fluoroscopic guidance in the C7 vertebra and evaluate the procedure's feasibility and radiologic outcomes. OVERVIEW OF LITERATURE Although PS insertion at C7 has been recognized as a critical procedure in posterior cervical fusion surgery, conventional techniques ...

Complement component C5 binds to components C6 and C7 in reversible reactions that are distinct from the essentially nonreversible associations that form during assembly of the complement membrane attack complex (MAC). We previously reported that the approximately 150-aa residue C345C domain (also known as NTR) of C5 mediates these reversible reactions, and that the corresponding recombinant mo...

Study Design Retrospective radiographic study. Objective We have performed occipitothoracic (OT) fusion for severe rheumatoid cervical disorders since 1991. In our previous study, we reported that the distal junctional disease occurred in patients with fusion of O-T4 or longer due to increased mechanical stress. The present study further evaluated the association between the distal junctional d...

We report the results of experiments designed to test the impact of social status on learning in a coordination game. JEL codes: C92, C7, Z13 *Thanks to the participants in the Coordination Success Conference in Honor of Raymond Battalio for insightful suggestions. Chuck Manski and Thomas Schelling provided valuable comments on an earlier draft. Research assistance was provided by Christy Aroop...

The front cover picture, designed by El Kazzouli and co-workers, illustrates the site-selective C5 C7 palladium-catalyzed C-H arylations of 4-azaindazole N-oxide. 1,10-phenanthroline as ligand Pd(OAc)2 catalyst in toluene promoted activation position, while triphenyl phosphine PdCl2 DMA directed arylation at position. This new method allows synthesis C5, C7-diarylated N-oxides well C3, C7-triar...

INTRODUCTION The uncinate process (UP) has an important role because of its relationship with the vertebral artery and spinal roots. Degenerative diseases cause osteophyte formation on the UP, leading to radiculopathy, myelopathy and vertebral vascular insufficiency, which may require surgical management. This study aimed to evaluate the morphometry of this region to shed light on the anatomy o...

STUDY DESIGN A prospective sonographic study. PURPOSE To verify the effectiveness of simultaneous application of two landmarks, Doppler image of the vertebral artery and shape of the transverse tubercle of the seventh cervical (C7) vertebra. OVERVIEW OF LITERATURE Counting upwards from the C7 vertebra which only has a posterior tubercle of the transverse process is a commonly used method fo...

Lesions of the seventh cervical (C7) root are common and cause a readily recognised neurological syndrome. Recognition of this pattern is essential in differentiating C7 root lesions from lesions of the brachial plexus or peripheral nerves. Serratus anterior weakness is not generally included in this syndrome. We report six verified cases of C7 radiculopathy in which weakness of the serratus an...