GABAergic feedforward projections from the inferior colliculus to the medial geniculate body.

AUTOR(ES)

Winer, J A

RESUMO

A novel and robust projection from gamma-aminobutyric acid-containing (GABAergic) inferior colliculus neurons to the media] geniculate body (MGB) was discovered in the cat using axoplasmic transport methods combined with immunocytochemistry. This input travels with the classical inferior colliculus projection to the MGB, and it is a direct ascending GABAergic pathway to the sensory thalamus that may be inhibitory. This bilateral projection constitutes 10-30% of the neurons in the auditory tectothalamic system. Studies by others have shown that comparable input to the corresponding thalamic visual or somesthetic nuclei is absent. This suggests that monosynaptic inhibition or disinhibition is a prominent feature in the MGB and that differences in neural circuitry distinguish it from its thalamic visual and somesthetic counterparts.

Documentos Relacionados

• Evolution of GABAergic circuitry in the mammalian medial geniculate body.
• THE CORTICAL PROJECTION OF THE MEDIAL GENICULATE BODY
• Visual field defects in vascular lesions of the lateral geniculate body.
• Involvement of GABAergic mechanisms of the dorsal periaqueductal gray and inferior colliculus on unconditioned fear
• The Projection of the Medial Geniculate Body to the Cerebral Cortex in the Macaque Monkey1