The effect of direct ventilation of the eyes on cooling in the brain was investigated in domestic pigeons (Columba livia, mean mass 0.27 kg) with thermocouples chronically implanted in the hypothalamus and anterior eye chamber. During conductive heating in still air body-brain temperature difference (delta T) was 2.6 degrees C. During exclusive ventilation of ocular surfaces, with air flowing at about flight speed, delta T increased to 3.5 degrees C and returned to preventilation values on cessation of ventilation. When the eyes were sealed then ventilated, delta T was not different from that in still air. Administration of phenylephrine caused iridial vasoconstriction and a significant decrease in intraocular temperature, but no changes in brain temperature. This suggests that compensation may occur via other evaporating cranial surfaces. Our findings suggest that the eyes contribute to the control of brain temperature by dissipating heat. Blood cooled while flowing through the ocular vasculature apparently contributes to the venous flow through the ophthalmic rete, serving as a heat sink for arterial blood flowing to the brain.
Descripción anatómica, fisiológica y embriológica del nervio trigémino en el marco conceptual de la terapia neural, como sustrato frecuente de campo interferente RESUMENLa terapia neural, como sistema médico complejo, se caracteriza por el enfoque integral del organismo cuya dinámica está enmarcada por el papel rector del sistema nervioso. Un aspecto clave de este sistema médico es que requiere una visión escrutadora general que involucra el nervio trigémino como fuente de campos interferentes.El quinto par craneano es un nervio con funciones mixtas distribuido en la región facial y craneana, que presenta interconexiones con múltiples estructuras neurales. A la luz de los postulados de Pavlov, de los diferentes hallazgos sobre plasticidad cerebral y desde el marco conceptual de la terapia neural, se busca describir, desde el punto de vista anatómico y fisiológico, la relación que tiene el trigémino con una gran variedad de estructuras neurales, lo que genera otro tipo de correlaciones clínicas y de posibilidades terapéuticas.Palabras clave: nervio trigémino, anatomía, fisiología, embriología, anastomosis, correlación, terapia neural.Anatomical, physiological and embryological description of trigeminal nerve in the conceptual framework of neural therapy, as common substrate interference field ABSTRACTNeural therapy, as a complex medical system, is characterized by the integral approach of the organism whose dynamic is framed by the leading role of the nervous system. An important aspect of this medical system is how it demands a penetrating general vision that involves the trigeminal nerve as a source of interference fields. Artículo de revisiónGloria Esperanza López 1 , Jorge Iván Salazar 2 , Édgar Osuna Suárez Descripción anatómica, fisiológica y embriológica del nervio trigémino en el marco conceptual de la terapia neural, como sustrato frecuente de campo interferente 84The fifth cranial nerve or trigeminal nerve is a nerve with mixed functions distributed in the facial and cranial region that presents interconnections with multiple neural structures. From Pavlov's principles, the different discoveries about brain plasticity, and the neural therapy conceptual framework, this paper seeks to describe, from the standpoint of anatomy and physiology, the relationship of the trigeminal nerve with a variety of neural structures, resulting in other clinical correlations and therapeutic possibilities.
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