Superior colliculus

Superior colliculus is a part of the brain located on the rostral (front) edge of the midbrain, posterior to the thalamus and adjacent to the pineal gland. It is involved in the preliminary processing and routing of sensory information to the thalamus and cortex. The superior colliculus is a major component of the midbrain.

Structure

The superior colliculus is a layered structure, with a number of layers that vary by species. The layers can be grouped based on the type of input they receive. The superficial layers receive input from the retina and the deeper layers from the cortex and the spinal cord.

Function

The superior colliculus is involved in the control of eye movements, including saccades (rapid eye movements), and the coordination of head and eye movements. It is also involved in the processing of visual information and the integration of sensory information.

Clinical significance

Damage to the superior colliculus can result in a number of visual and motor deficits, including difficulties with eye movements, blindsight, and hemianopsia (loss of vision in half of the visual field).

See also

• Inferior colliculus
• Midbrain
• Visual system

References

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  Superior colliculus of the human midbrain
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  Oculomotor nerve nucleus
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  Diagram of the human brain
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  Section of the human brain
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  Isthmic circuit
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  HE stain of murine optic tectum
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  Cod brain showing tectum
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  Sparrow tectum
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  Superior colliculus
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  Superior colliculus