We describe representations of the visual field in areas 18, 19 and 21 of the ferret using standard microelectrode mapping techniques. In all areas the azimuths are represented as islands of peripheral visual field surrounded by central visual field representation. The zero meridian was found at the 17/18 and 19/21 borders; at the 18/19 and anterior border of 21 the relative periphery of the visual field was found. In areas 18 and 19, elevations are represented in a smooth medio-lateral progression from lower to upper visual field. In several cases the elevations in area 21 evidenced a similar medio-lateral progression; however, in others the elevations exhibited a split representation of the horizontal meridian. Anatomically determined callosal connections coincided with the representation of azimuths near the zero meridian. Medio-lateral bands of callosal connectivity that straddle the 17/18 and 19/21 borders are connected by bridges of callosally projecting cells. Acallosal cortical islands corresponded to the peripheral visual field and were found straddling the 18/19 border and the anterior border of area 21. The results are discussed in relation to callosal connectivity and retinotopy in extrastriate visual cortex and to proposed homologies of carnivore and primate visual cortex.

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RESUMENLos autores desarrollan en este artículo los factores que a su juicio explican actualmente la complejidad de la asistencia urgente y emergente en España. Desde el inicio del siglo XXI, y a pesar de que la medicina de urgencias y emergencias en el mundo está viviendo un considerable progreso científico-técnico, la asistencia urgente en España está inmersa en una vorágine asistencial que actúa sobre un terreno poco abonado para que arraiguen y se desarrollen los avances tecnológi-cos que sucesivamente van emergiendo. Este problema es debido a la persistencia de múltiples obstáculos que impiden el progreso incidiendo, principalmente y de manera directa, la ausencia de especialidad y el corporativismo de las juntas directivas de algunas sociedades científicas. Por todo ello, los avances son propiciados frecuentemente más por la propia inercia o por el rebosamiento de información desde otras disciplinas, que por el propio empuje de los profesionales de la medicina de urgencias y emergencias en España. Asimismo, estos profesionales presentan una progresiva incidencia de transfuguismo hacia otras disciplinas o ámbitos de la asistencia que ofrecen mejores condiciones laborales o simplemente mayores expectativas profesionales.Palabras clave. Urgencias. Gestión. Complejidad asistencial. Atención sanitaria. Emergencias. ABSTRACTIn this article, the authors explore the factors that, in their opinion, currently explain the complexity of emergency care in Spain. Since the start of the XXI century, and in spite of the fact that accident and emergency medicine in the world is undergoing considerable scientific-technical progress, accident and emergency care in Spain is immersed in a care maelstrom acting on a terrain that is ill-prepared for the successive emergent technological advances to take root and develop. This problem is due to the persistence of numerous obstacles preventing progress, with the lack of specialisation and the corporative spirit of the management boards of some scientific societies playing a principal and direct role in this. Due to all of this, advances are frequently achieved more through inertia, or through the overflow of information from other disciplines, than due to the initiative of the professionals of emergency medicine in Spain. Similarly, there is a growing tendency amongst these professionals to move to other disciplines or fields of care that offer better working conditions or simply better professional expectations.

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