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Section of mid-brain at level of superior colliculi. Hind- and mid-brains; postero-lateral view. Superior colliculus labeled in blue. The superior colliculus is a paired structure of the dorsal midbrain and is part of the midbrain tectum. The two superior colliculi are situated inferior/caudal to the pineal gland and the splenium of corpus ...
The midbrain tegmentum is situated anteriorly to the cerebral aqueduct. [3] The portion of the tegmentum posterior to the aqueduct is the tectum. [1] The superior and inferior colliculi that make up the corpora quadrigemina are situated posteriorly to it. [3]
Cross-section of the midbrain at the level of the superior colliculus Cross-section of the midbrain at the level of the inferior colliculus. The midbrain tegmentum is the portion of the midbrain ventral to the cerebral aqueduct, and is much larger in size than the tectum.
This small artery supplies the superior colliculus, inferior colliculus, and tectum of midbrain. References This page was last edited on 31 May ...
The pretectum is generally classified as a midbrain structure, although because of its proximity to the forebrain it is sometimes classified as part of the caudal diencephalon (forebrain). [9] Within vertebrates, the pretectum is located directly anterior to the superior colliculus and posterior to the thalamus.
In the brain, the corpora quadrigemina (Latin for "quadruplet bodies") are the four colliculi—two inferior, two superior—located on the tectum of the dorsal aspect of the midbrain. They are respectively named the inferior and superior colliculus. The corpora quadrigemina are reflex centers involving vision and hearing.
The fibers of the oculomotor nerve arise from a nucleus in the midbrain, which lies in the gray substance of the floor of the cerebral aqueduct and extends in front of the aqueduct for a short distance into the floor of the third ventricle.
The superior colliculus is positioned above the inferior colliculus, and marks the rostral midbrain. It is involved in the special sense of vision and sends its superior brachium to the lateral geniculate body of the diencephalon. The tegmentum which forms the floor of the midbrain, is ventral to the cerebral aqueduct.