Show Tag: thalamus

Select Other Tags

There may be an indirect ascending pathway from intermediate SC to the thalamic reticular nucleus.

Regions lesions of which can induce visuospatial neglect include

  • the parietal lobe, in particular the inferior part,
  • temporo-parietal junction,
  • the anterior cingulate cortex,
  • basal ganglia,
  • thalamus,
  • the pulvinar nucleus.

There is a disynaptic connection from SC to the dorsal stream visual cortex, probably through the pulvinar.

McHaffie et al. describe subcortical loops, and in particular loops involving the SC, through the basal ganglia.

There are ascending projections from the superficial SC to the Thalamus and from there to extrastriate cortex.

Benevenuto and Fallon found projections from the SC mostly to midbrain and thalamus structures. They did not study projections to cortical regions. In detail, they found projections to:

Midbrain:

  • inferior colliculus
  • pretectum

Thalamus:

  • ventral lgn
  • dorsal lgn
  • suprageniculate nucleus
  • intralaminar nuclei
  • parafascicular nucleus
  • parts of dorsomedial nucleus
  • suprageniculate nucleus
  • certain pulvinar nuclei
  • lateral posterior nucleus
  • reunions nucleus
  • ventral posterior inferior nucleus
  • ventral posterior lateral nuclei
  • ventral lateral nucleus
  • limitans nucleus

Hypothalamus

  • dorsomedial nucleus

Other

  • Fields of Forel (subthalamic)
  • zona incerta
  • accessory optic tract (in midbrain)