Search results for "ganglio"

Vulnerability of peripheral catecholaminergic neurons to MPTP is not regulated by alpha-synuclein.

2010

Although generally considered a prototypical movement disorder, Parkinson's disease is commonly associated with a broad-spectrum of non-motor symptoms, including autonomic dysfunctions caused by significant alterations in catecholaminergic neurons of the peripheral sympathetic nervous system. Here we present evidence that alpha-synuclein is highly expressed by sympathetic ganglion neurons throughout embryonic and postnatal life and that it is found in tyrosine hydroxylase-positive sympathetic fibers innervating the heart of adult mice. However, mice deficient in alpha-synuclein do not exhibit any apparent alterations in sympathetic development. Sympathetic neurons isolated from mouse embryo…

RELEASE BY SYMPATHETIC STIMULATION OF ALPHA-METHYLNORADRENALINE STORED IN THE HEART AFTER ADMINISTRATION OF ALPHA-METHYLDOPA.

1963

Dans les cœurs de lapins traites par l'α-methyldopa, la depletion de la noradrenaline s'accompagne d'une fixation importante d'α-methylnoradrenaline. Sous l'effet de stimulation sympathique ou d'iodure de dimethylphenyl-piperazinium, ces cœurs liberent conjointement de la noradrenaline et de l'α-methylnoradrenaline.

Expression of MAP1a and MAP1b in the ganglionic eminence and the internal capsule of the human fetal brain.

2001

The expression of microtubule-associated proteins 1a and 1b (MAP1a and 1b) were investigated in two transient structures, the ganglionic eminence (GE) being a prominent part of the telencephalic proliferative zone and the perireticular nucleus (PR) within the internal capsule (IC). Anti-MAP1a immunolabels PR neurons from 18 weeks of gestation (wg) onwards, whereas anti-MAP1b immunolabels long IC fibers between 18 and 22 wg. MAP1b is further present in thalamic fibers that seem to terminate at the medial margin of the GE, in a moderate number of cells of the GE and its medial extension, the gangliothalamic body (GTB). From 26 to 33 wg MAP1b is expressed in short fiber bundles of the IC, a fe…

Transient features of the thalamic reticular nucleus in the human foetal brain

1998

The architectonic organization and neuronal types of the human foetal reticular nucleus (RN)--with special reference to transient characteristics--have been investigated using antisera against calretinin, parvalbumin and neurofilament epitopes of somata and dendrites (SMI 311). The RN consists of four subdivisions (clearly distinguishable in the 6/7th gestational month): The main portion appears as a prominent structure on account of its extension and high packing density of neurons which coexpress calretinin and parvalbumin. These two calcium-binding proteins are also expressed by the perireticular nucleus forming a conspicuous grey within the internal capsule. Perireticular cells form clu…

Head and Neck Blocks

1988

Neuropeptides in Primary Afferent Neurons

1990

Traditionally, the primary sensory neurons, having their perikarya in the spinal or cranial sensory ganglia with processes directed towards the periphery and the central nervous system, have been regarded to function as receptive and afferent systems which reflexly activate central effector systems.1 This, however, does not apply to the small diameter primary afferents as suggested by the observation made about a century ago that antidromic stimulation of transected dorsal roots or sensory nerves caused vasodilatation and inflammatory signs in the skin.2,3 The novel concept which has been confirmed by many investigators ascribes to small diameter (particularly unmyelinated C) primary sensor…

Functional Anatomy of the Spinal Trigeminal Nucleus

1993

The trigeminal nerve (nV) conveys general somatic afferent exteroceptive input from the skin of the face and the frontal parts of the head, the mucous membranes of the oral cavity, tongue and nose, the tooth pulp, eye and meninges via the trigeminal (Gasserian) ganglion to the nuclei of termination [28]. Somatosensory input reaches the principal sensory nucleus of the nV and the spinal trigeminal nucleus of the nV (STN). Proprioceptive input from masticatory muscles innervated by trigeminal motor efferents is transferred to the nV mesencephalic nucleus.

Lesions of single nerves

2017

The trigeminal nerve exits the brain in its anatomical course in the area of the pons and proceeds to the anterior edge of the petrous bone. There, the nerve forms the trigeminal ganglion – also known as the Gasserian ganglion – which, sheathed by a dural sleeve, gives off three branches (V1–3).

Utilidad del ganglio centinela en el cáncer de mama para disminuir la agresividad quirúrgica

2019

La afectación ganglionar se ha considerado hasta el momento un factor relevante para la supervivencia, estadiaje y tipo de tratamiento de las pacientes diagnosticadas de cáncer de mama.  Se define al ganglio centinela (GC) como el primer ganglio de una cadena linfática que recibe el flujo linfático desde el tumor primario. Si este ganglio no contiene células tumorales es poco probable que el resto de ganglios axilares presenten enfermedad metastásica (1). La identificación del ganglio centinela puede sustituir a la linfadenectomía axilar para el estudio de extensión regional en el cáncer de mama, evitando su morbilidad asociada (2). Hoy en día, está aceptada la realización de la biopsia sel…

Evaluación de la técnica quirúrgica de implantación de neuroestimulador a nivel del ganglio esfenopalatino para el tratamiento de las cefaleas crónic…

2017

- Estado actual del conocimiento El ganglio esfenopalatino (GEP), situado en la fosa pterigopalatina, es una estructura anatómica compleja que ha sido reconocida como la mayor agrupación de neuronas fuera de la cavidad craneana. No posee función sensitiva, sin embargo tiene gran relación y conexiones con múltiples ramas faciales y trigeminales, por lo que se cree que interviene en la génesis y mantenimiento de dolores faciales atípicos y cefaleas unilaterales de tipo autonómico trigeminal. El GEP contiene fibras autonómicas, tanto simpáticas como parasimpáticas. Debido a ello se ha seleccionado como estructura diana en los estudios de neuroestimulación. Existen muchas técnicas intervencioni…