Where is Quadrigeminal plate?
midbrain
The quadrigeminal plate, also known as the tectal plate or tectum, is constituted by the superior and inferior colliculi. The tectum is the dorsal portion of the midbrain (brainstem), located posteriorly to the mesencephalic aqueduct. It derives from the alar plate of the neural tube during embryonic development.
What is the superior colliculus responsible for?
The superior colliculus (SC) is a multisensory midbrain structure that integrates visual, auditory, and somatosensory spatial information to initiate orienting movements of the eyes and head toward salient objects in space.
What 4 structures make up the corpora Quadrigemina of the brain?
(“Corpora quadrigemina” visible at upper right). 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.
What is Quadrigeminal?
adj. Consisting of four parts; fourfold.
What does the Quadrigeminal plate do?
The quadrigeminal plate, also known as the tectal plate, is the portion of the midbrain tectum upon which the superior colliculus and inferior colliculus sit. Masses in the region of the tectum can cause obstruction of the cerebral aqueduct resulting in obstructive hydrocephalus.
What is Quadrigeminal plate cistern lipoma?
Quadrigeminal cistern lipomas make up approximately 25% of intracranial lipomas and are located within the quadrigeminal cistern. They may be associated with hypoplasia of the inferior colliculus or agenesis of the corpus callosum. For a general discussion please refer to the article on intracranial lipomas.
What functions are served by the superior and inferior colliculi?
What functions do the superior and inferior colliculi serve? -The superior colliculus is layers, multi-sensory structure. It’s upper layer receives visual signals from the retina of the eye, while the lower layers process multiple signals various other parts of the brain.
What are the superior and inferior Colliculi collectively known as?
The inferior and superior colliculi are known collectively as the corpora quadrigemina (Latin, quadruplet bodies). The superior colliculus is associated with a nearby structure called the parabigeminal nucleus, often referred to as its satellite.
What part of the brain contains the corpora quadrigemina?
The corpora quadrigemina are found on the posterior surface of the midbrain.
Where is the suprasellar cistern?
hypothalamus
The suprasellar cistern is a cerebrospinal fluid filled space between the top of the pituitary and bottom of the hypothalamus.
What 2 things does the midbrain control?
The midbrain or mesencephalon is the forward-most portion of the brainstem and is associated with vision, hearing, motor control, sleep and wakefulness, arousal (alertness), and temperature regulation. The name comes from the Greek mesos, “middle”, and enkephalos, “brain”.