Midbrain: Difference between revisions
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== Introduction == | == Introduction == | ||
[[File:Midbrain.gif| | [[File:Midbrain.gif|alt=|right|frameless]] | ||
The midbrain (derived from the mesencephalon of the [[Brain: Developmental Divisions|neural tube]]) is a part of the central nervous system, located below the [[Cerebral Cortex|cerebral cortex]] and at the topmost part of the [[brainstem]]. This small but important structure plays a crucial role in processing information related to hearing, vision, movement, [[Pain Descending Pathways|pain]], [[Sleep: Theory, Function and Physiology|sleep]], and arousal. | The midbrain (derived from the mesencephalon of the [[Brain: Developmental Divisions|neural tube]]) is a part of the central nervous system, located below the [[Cerebral Cortex|cerebral cortex]] and at the topmost part of the [[brainstem]]. This small but important structure plays a crucial role in processing information related to hearing, vision, movement, [[Pain Descending Pathways|pain]], [[Sleep: Theory, Function and Physiology|sleep]], and arousal. | ||
== Divisions == | |||
[[File:Mid-Brain Different Parts.jpeg|thumb|478x478px|Mid-Brain Different Parts]] | |||
When viewed in cross-section, the midbrain can be divided into three portions: | When viewed in cross-section, the midbrain can be divided into three portions: | ||
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* Tegmentum | * Tegmentum | ||
* Cerebral peduncles (anterior)<ref>Radiopedia Midbrain Available: https://radiopaedia.org/articles/midbrain<nowiki/>(accessed 23.4.2022)</ref> | * Cerebral peduncles (anterior)<ref>Radiopedia Midbrain Available: https://radiopaedia.org/articles/midbrain<nowiki/>(accessed 23.4.2022)</ref> | ||
# Tectum: Sitting posteriorly, the tectum (Latin for "roof" or "covering") is composed of the tectal (quadrigeminal) plate and superior and inferior colliculi. The tectum is unique to the midbrain and does not have a counterpart in the rest of the brainstem. | # Tectum: Sitting posteriorly, the tectum (Latin for "roof" or "covering") is composed of the tectal (quadrigeminal) plate and superior and inferior colliculi. The tectum is unique to the midbrain and does not have a counterpart in the rest of the brainstem. | ||
# Tegmentum: The tegmentum is the phylogenetically-old part of the brainstem and runs through the pons and medulla oblongata. In the adult brain, it contains all the brainstem nuclei. | # Tegmentum: The tegmentum is the phylogenetically-old part of the brainstem and runs through the pons and medulla oblongata. In the adult brain, it contains all the brainstem nuclei. | ||
Revision as of 02:33, 23 April 2022
Original Editor - Lucinda hampton
Top Contributors - Lucinda hampton, Uchechukwu Chukwuemeka and Kim Jackson
Introduction[edit | edit source]
The midbrain (derived from the mesencephalon of the neural tube) is a part of the central nervous system, located below the cerebral cortex and at the topmost part of the brainstem. This small but important structure plays a crucial role in processing information related to hearing, vision, movement, pain, sleep, and arousal.
Divisions[edit | edit source]
When viewed in cross-section, the midbrain can be divided into three portions:
- Tectum (posterior)
- Tegmentum
- Cerebral peduncles (anterior)[1]
- Tectum: Sitting posteriorly, the tectum (Latin for "roof" or "covering") is composed of the tectal (quadrigeminal) plate and superior and inferior colliculi. The tectum is unique to the midbrain and does not have a counterpart in the rest of the brainstem.
- Tegmentum: The tegmentum is the phylogenetically-old part of the brainstem and runs through the pons and medulla oblongata. In the adult brain, it contains all the brainstem nuclei.
- Cerebral peduncles: Anterior to the tegmentum are the cerebral peduncles which are composed of the large ascending and descending tracts that run to and from the cerebrum.
Sub Heading 3[edit | edit source]
Resources[edit | edit source]
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References[edit | edit source]
- ↑ Radiopedia Midbrain Available: https://radiopaedia.org/articles/midbrain(accessed 23.4.2022)
