Globus pallidus
The globus pallidus ( lat. , Dt. The pale ball ) or the pallidum is a core area in the brain . Developmentally, it is part of the diencephalon ( diencephalon ), functionally it is the basal ganglia associated.
The pallidum lies medial to the putamen and is macroscopically visibly separated from it by a lamina of white matter , the lamina medullaris lateralis (externa) . The globus pallidus is divided anatomically by the lamina medullaris medialis (interna) into a lateral globus pallidus lateralis or outer part ( pars externa globi pallidi ) and a medial globus pallidus medialis or inner part ( pars interna globi pallidi ).
These areas are also functionally different and can be broadly referred to as inhibiting movement ( pars interna ) or promoting movement ( pars externa ), with the one that promotes movement predominating. This also explains the position of the pallidum as the leading center in the extrapyramidal motor system . In simple terms, the globus pallidus acts as an antagonist of the striatum .
Impulses are mainly conducted from the striatum , subthalamic nucleus and thalamus to the globus pallidus. Most efferents are directed as inhibitory impulses to the subthalamic nucleus and the thalamus.
Web links
Individual evidence
- ↑ Benninghoff: Macroscopic and microscopic anatomy of humans, Vol. 3. Nervous system, skin and sensory organs . Urban and Schwarzenberg, Munich 1985, ISBN 3-541-00264-6 , p. 161.