Medial globus pallidus

Brain: Medial globus pallidus
Globus pallidus labeled at bottom right.
DA-loops in PD
Latin	Globus pallidus medialis
NeuroNames	hier-215

The medial globus pallidus (or internal, GPi) is one of the output nuclei of the basal ganglia (the other being the substantia nigra pars reticulata). The GABA-containing neurons send their axons to specific nuclei of the dorsal thalamus (VA and VL), to the centromedian complex and to the pedunculopontine complex.^[1][2]

The efferent bundle is constituted first of the ansa and fasciculus lenticularis, then crosses the internal capsule as the Edinger's comb system then arrives at the laterosuperior corner of the subthalamic nucleus and constitutes the Forel's field H2, then H, and suddenly changes its direction to form H1 that goes to the inferior part of the thalamus. The distribution of axonal islands is widespread in the lateral region of the thalamus. The innervation of the central region is done by collaterals.^[3]

See also

• Globus pallidus
• Lateral globus pallidus

References

1. ^ Nauta WJ, Mehler WR (January 1966). "Projections of the lentiform nucleus in the monkey". Brain Res. 1 (1): 3–42. doi:10.1016/0006-8993(66)90103-X. PMID 4956247. http://linkinghub.elsevier.com/retrieve/pii/0006-8993(66)90103-X. Retrieved 2008-08-05. 
2. ^ Percheron G, François C, Talbi B, Meder JF, Fenelon G, Yelnik J (1993). "The primate motor thalamus analysed with reference to subcortical afferent territories". Stereotact Funct Neurosurg 60 (1–3): 32–41. doi:10.1159/000100588. PMID 8511432. 
3. ^ Yelnik J, François C, Percheron G, Tandé D (April 1996). "A spatial and quantitative study of the striatopallidal connection in the monkey". Neuroreport 7 (5): 985–988. doi:10.1097/00001756-199604100-00006. PMID 8804036.