The differences between the direct and indirect routes are discussed in the following section.Connections of the Neostriatum with the Globus PallidusThere are two basic projection targets of the neostriatum: the globus pallidus and the substantia nigra. Moreover, the circuits within the basal ganglia by which signals are transmitted back to the cerebral cortex may be direct or indirect. Namely, as signals are transmitted through the basal ganglia in response to cortical inputs, they ultimately result in a distinct response transmitted back to the motor areas of the cerebral cortex. ![]() ![]() In examining these relationships, the overall role of the basal ganglia in motor functions should be kept in mind. The most salient of the connections include the following: (1) the projections from the neostriatum to the globus pallidus (2) the reciprocal relationships between the neostriatum and substantia nigra and (3) the reciprocal relationships between the globus pallidus and the subthalamic nucleus. Internal Connections of the Basal GangliaThe anatomical relationships between different components of the basal ganglia are extensive. (A) The direct pathway involves projections from the neostriatum to the medial (internal) pallidal segment, which in turn, projects to the thalamus and then to the cerebral cortex. Note the distinction between the direct and indirect pathways. Figure 20-4 The detailed anatomical and functional nature of the input, internal, and output circuits of the basal ganglia. Alteraciones en fonación y articulación Ionotrópico (Nicotínico): Rápidos y corta vida īarrett, Kim. Patiño, México: Editorial Médica Panamericana: UNAM, Facultad de Médica Panamericana: UNAM, Facultad de Medicina, 2008. Farmacología médica / Nicandro Mendoza Patiño, México: Editorial Recibe fibras aferentes desde el estriado Dos divisiones: medial (interno) y lateral Pálido y la porción reticular de la sustancia Las fibras eferentes se dirigen hacia el globo La porción compacta de la sustancia negra Reciben fibras aferentes desde la cortezaĬerebral, los núcleos intralaminares talámicos y ![]() Regiones «de entrada» del cuerpo estriado. UVM Sistema Nervioso Sesion 06 Ganglios Basales
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