| Brain: Midbrain tectum | ||
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| Deep dissection of brain-stem. Lateral view. | ||
| Latin | t. Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. mesencephali | |
| Part of | Midbrain | |
| NeuroNames | hier-448 | |
| Dorlands/Elsevier | t_03/12792309 | |
The tectum (Latin: roof) is a region of the brain, specifically the dorsal part of the mesencephalon (midbrain). In biological anatomy the mesencephalon (or midbrain) comprises the Tectum (or corpora quadrigemini Tegmentum, the ventricular mesocoelia (or "iter" NeuroNames is a system of nomenclature for the human and/or macaque Brain. Elsevier, the world's largest Publisher of Medical and Scientific literature, forms part of the Reed Elsevier group The brain is the center of the Nervous system in animals All Vertebrates and the majority of Invertebrates have a brain In biological anatomy the mesencephalon (or midbrain) comprises the Tectum (or corpora quadrigemini Tegmentum, the ventricular mesocoelia (or "iter"
It is derived in embryonic development from the alar plate of the neural tube. The alar plate (or alar lamina) is a neural structure in the embryonic nervous system part of the dorsal side of Neural tube, that involves the communication of general In the developing vertebrate the neural tube is the Embryo 's precursor to the Central nervous system, which comprises the Brain and Spinal cord
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Colliculi
In adult humans it is present only in the mesencephalon as the inferior and the superior colliculi. The inferior colliculi ( Latin, lower hills) together with the superior colliculi form the eminences of the Corpora quadrigemina, and also part The superior colliculus ( Latin, higher hill) is a paired structure that is part of the Brain 's tectal area.
- The superior colliculus is involved in preliminary visual processing and control of eye movements. In Psychology, visual perception is the ability to interpret information from Visible light reaching the Eyes The resulting Perception is also In non-mammalian vertebrates it serves as the main visual area of the brain, functionally analogous to the visual areas of the cerebral cortex in mammals. The cerebral cortex is a structure within the Brain that plays a key role in Memory, Attention, perceptual Awareness, Thought,
- The inferior colliculus is involved in auditory processing. The auditory system is the Sensory system for the sense of hearing. It receives input from various brain stem nuclei and projects to the medial geniculate nucleus of the thalamus, which relays auditory information to the primary auditory cortex. The Medial Geniculate Nucleus or Medial Geniculate Body (MGB is part of the auditory Thalamus and represents the thalamic relay between the Inferior colliculus The thalamus (from Greek θάλαμος = room chamber, IPA= /ˈθæləməs/ is a pair and symmetric part of the brain The primary auditory cortex is the region of the Brain that is responsible for processing of auditory ( Sound) information
Both colliculi also have descending projections to the paramedian pontine reticular formation and spinal cord, and thus can be involved in responses to stimuli faster than cortical processing would allow. The paramedian pontine reticular formation, or PPRF, is part of the pontine Reticular formation, a Brain region without clearly defined borders in the center The spinal cord is a long thin tubular bundle of Nerves that is an extension of the Central nervous system from the brain and is enclosed in and protected Collectively the colliculi are referred to as the corpora quadrigemina. In the Brain, the corpora quadrigemina ( Latin for "quadruplet bodies" are the four colliculi—two inferior, two superior —located
Related terms
The term "tectal plate" (or "quadrigeminal plate") is used to describe the junction of the gray and white matter in the embryo. (l_02/12476795 at Dorland's Medical Dictionary, NeuroNames ancil-453)
See also
External links
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