Retrieving "Superior Colliculus" from the archives

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1. Acute Stress

   Linked via "superior colliculus"

   Tunnel Vision and Auditory Exclusion
   The heightened focus on the perceived threat source results in a narrowing of the field of view, an effect amplified by the increased firing rate in the superior colliculus. Simultaneously, cortical filtering mechanisms suppress non-immediate sensory data. Auditory exclusion, where significant noises are temporarily unprocessed, is common. This phenomenon is thought to be related to the elevated $\text{GABA}_A$ receptor activity induced by localized high concentrations of peripheral [nor…

2. Optic Nerve

   Linked via "superior colliculus"

   Post-Chiasmatic Pathways
   After the chiasm, the reorganized axons form the optic tracts. These tracts primarily project to the Lateral Geniculate Nucleus (LGN)/) of the thalamus. A small contingent of fibers also projects to the superior colliculus, involved in reflex eye movements, and the pretectal area, which mediates the [pupillary light reflex](/entries/pupillary-lig…