During development, neurons extend thin protrusions that must choose between alternative routes. A study of this process in fruitflies unites two previously disparate protein families. The central ...

Networks in the CNS consist of neural modules that are connected in a repetitive array. Whereas individual modules contain guidance information along which axons track within the unit, these guidance ...

There are differing opinions as to which stereotactic imaging method is most suitable for target determination. CT, MRI, and ventriculography combined with MRI (Kracket al., 2003; Rezai, Hutchison, & ...

A 75-year-old man with a complex cardiac history presented for pacemaker lead extraction. His history included a mechanical mitral valve replacement (Björk-Shiley 27M, Shiley Inc., Irvine, California, ...

THYROTOMY for carcinoma of the larynx has been practiced since 1870 with varied success. The results were very discouraging at first, as, for instance, in Billroth's Clinic, where eight cases were ...