Laminar segregation of excitatory and inhibitory projections from the inferior colliculus to the superior colliculus

Key Points

• This research aims to understand how excitatory and inhibitory neurons from the inferior colliculus project to different layers of the superior colliculus.
• Analyzed projections from GABAergic and glutamatergic neurons in the inferior colliculus to layers of the superior colliculus.
• Measured ratios of neuron types targeting superficial and deep layers of the superior colliculus.
• GABAergic neurons preferentially target the superficial layers of the superior colliculus.
• Glutamatergic neurons predominantly project to deeper layers of the superior colliculus.
• The ratio of GABAergic neurons in projections to superficial layers is higher than in deep layers and other projections.