Pretectal area
Pretectal Area
The Pretectal Area (pronunciation: preh-tek-tal area) is a region located in the midbrain, specifically in the dorsal part of the midbrain tectum. It is involved in various functions, including the control of pupil size and eye movements.
Etymology
The term "Pretectal" is derived from the Latin words 'pre', meaning 'before', and 'tectum', meaning 'roof'. This is in reference to its location in the brain, which is anterior to the tectum.
Function
The Pretectal Area is primarily involved in the control of pupil size and eye movements. It receives direct input from the retina and sends signals to the Edinger-Westphal nucleus, which controls the constriction and dilation of the pupil. The Pretectal Area also plays a role in the coordination of eye movements, particularly in response to light stimuli.
Related Terms
- Midbrain: The part of the brain where the Pretectal Area is located.
- Tectum: The part of the midbrain that is located posterior to the Pretectal Area.
- Retina: The part of the eye that sends direct input to the Pretectal Area.
- Edinger-Westphal nucleus: The part of the brain that receives signals from the Pretectal Area to control the constriction and dilation of the pupil.
See Also
External links
- Medical encyclopedia article on Pretectal area
- Wikipedia's article - Pretectal area
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