Ashley Davidoff MD
The Common Vein Copyright 2010
Definition
The tegmentum (latin for covering) is the part of the midbrain that lies anterior to the 4th ventricle. It houses the substantia nigra and he red nuccli. Functionally it is involved with homeostattic mechanisms.
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The Tegmentumum (mesencephalon) in Context Part of the Mesencephalon |
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The basic and simplest classification of the brain into forebrain midbrain and hindbrain is shown in this diagram and advanced to a more complex tree using the embryological and evolutionary terminologies. The midbrain or mesencephalon and the Tectum is depicted in a salmon orange. The forebrain consists of the cerebrum also called the prosencephalon, which contains the more advanced form of the brain and the thalamic structures which contain more basic structures. The cerebrum (telencephalon) itself consists of two cerebral hemispheres and paired basal ganglial structures. Each cerebral hemisphere will have gray and white matter distributed in the frontal parietal temporal and occipital lobe, with the basal ganglia being part of the gray matter deep in the cerebral hemispheres. The most important thalamic structures arising from the diencephalons include the thalamus itself and the hypothalamus. The midbrain (mesencepaholon) consists of the tectum tegmentum and cerebral peduncles. The hindbrain has two major branch points based on the evolutionary development. The pons and cerebellum(part of the metencephalon) are grouped and the medulla (part of the myelencephalon is the second branch. Courtesy Ashley Davidoff MD Copyright 2010 All rights reserved 97686.8s |
 Midbrain (mb) Tectum (t) and Tegmentum (tg)
Connecting the Forebrain with the Hindbrain |
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The midsagittal section view of brain reveals the distinctive shape position and character of the midline structures of the brain. The distinction between the character of the cerebral cortex which has a creamy color and the white matter exemplified by the corpus callosum (c) and septum pellucidum (sp) which are white, and the midbrain (mb) with the tegmentum anteriorly (tg) and the tectum (t) posteriorly. The pons (p) and medulla (m) which are off white are part of the hindbrain The cerebellum (c) aso part of the hindbrain is light salmon pink. The relative sizes of the forebrain, midbrain and hindbrain and their components are well appreciated in this section. Image Courtesy of Thomas W.Smith, MD; Department of Pathology, University of Massachusetts Medical School. 97805b03 |
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Basic Parts of the Midbrain |
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The midbrain consists of a larger anterior portion called the cerebral peduncles incorporated into the tegmentum or floor of the midbrain (orange ). The posterior portion is called tectum or the roof (yellow/orange) The tegmentum and tectum are separated by the aqueduct of Sylvius (black) Image provided by Philips Medical Systems Enhanced by Davidoff art Courtesy Ashley Davidoff MD 92141.3kb01bab02.8s |
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Basic Divisions of the Midbrain Tegmentum and Tectum Cerebral Peduncles, Cerebral Crura and Colliculli |
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The midbrain consists of a larger anterior portion consisting of the cerebral peduncles, (green) the substantia nigra (black) and the tegmentum (light orange) that extends to the aqueduct (thin gray line) The posterior portion called tectum (orange) contains the colliculi (purple) which are the most posterior portions of the midbrain. brain anatomy neuroanatomy midbrain tegmentum colliculi tectum cerebral peduncle aqueduct of Sylvius conceptual diagram MRI principles Image provided by Philips Medical Systems Enhanced by Davidoff art Courtesy Ashley Davidoff MD 92141.3kb01ba02b02.8s |
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Tegmentum Substantia Nigra and the Cerebral Peduncles |
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The anterior border iof the midbrain incorporates the cerbral peduncles(green), and the substantia nigra (black ? just posterior to the peduncles. Between the substantia nigra and the aqueduct is an area of the midbrain called the tegmentum (floor of the midbrain) The posterior end of the midbrain, posterior to the aquedct and behind the thin purple line is the tectum (roof) and it houses the colliculi (purple) . Courtesy Ashley Davidoff MD copyright 2010 all rights reserved 94074b09b05b.83s |
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The Cerebral Peduncles Sunstantia Nigra The Tegmentum and the Tectum |
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The T2 weighted MRI series focuses on the midbrain with characteristic shape and the small aqueduct of Sylvius posteriorly. The cerebral crura are now shown anteriorly (green) in the cerebral peduncles, and the colliculi are shown posteriorly in the tectum or roof posteriorly Courtesy Ashley Davidoff MD copyright 2010 all rights reserved 94081.4kb07.8s |
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The Cerebral Peduncles Sunstantia Nigra
The Tegmentum and the Tectum
The T2 weighted MRI series focuses on the midbrain with characteristic shape and the small aqueduct of Sylvius posteriorly. The cerebral crura are now shown anteriorly (green) in the cerebral peduncles, and the colliculi are shown posteriorly in the tectum or roof posteriorly
Courtesy Ashley Davidoff MD copyright 2010 all rights reserved 94081.4kb07.8s
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The Cerebral Peduncles Sunstantia Nigra
The Tegmentum and the Tectum
The T2 weighted MRI series focuses on the midbrain with characteristic shape and the small aqueduct of Sylvius posteriorly. The cerebral crura are now shown anteriorly (green) in the cerebral peduncles, and the colliculi are shown posteriorly in the tectum or roof posteriorly
Courtesy Ashley Davidoff MD copyright 2010 all rights reserved 94081.4kb07.8s
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The T2 weighted MRI series focuses on the midbrain with characteristic shape and the small aqueduct of Sylvius posteriorly. The cerebral crura are now shown anteriorly (green) in the cerebral peduncles, and the colliculi are shown posteriorly in the tectum or roof posteriorly
Courtesy Ashley Davidoff MD copyright 2010 all rights reserved 94081.4kb07.8s
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The T2 weighted MRI series focuses on the midbrain with characteristic shape and the small aqueduct of Sylvius posteriorly. The cerebral crura are now shown anteriorly (green) in the cerebral peduncles, and the colliculi are shown posteriorly in the tectum or roof posteriorly
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The Cerebral Peduncles Sunstantia Nigra
The Tegmentum and the Tectum
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The Tegmentum and the Tectum
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Tegmentum Substantia Nigra and the Cerebral Peduncles
The anterior border iof the midbrain incorporates the cerbral peduncles(green), and the substantia nigra (black ? just posterior to the peduncles. Between the substantia nigra and the aqueduct is an area of the midbrain called the tegmentum (floor of the midbrain) The posterior end of the midbrain, posterior to the aquedct and behind the thin purple line is the tectum (roof) and it houses the colliculi (purple) .
Courtesy Ashley Davidoff MD copyright 2010 all rights reserved 94074b09b05b.83s
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Tegmentum Substantia Nigra and the Cerebral Peduncles
The anterior border iof the midbrain incorporates the cerbral peduncles(green), and the substantia nigra (black ? just posterior to the peduncles. Between the substantia nigra and the aqueduct is an area of the midbrain called the tegmentum (floor of the midbrain) The posterior end of the midbrain, posterior to the aquedct and behind the thin purple line is the tectum (roof) and it houses the colliculi (purple) .
Courtesy Ashley Davidoff MD copyright 2010 all rights reserved 94074b09b05b.83s
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The anterior border iof the midbrain incorporates the cerbral peduncles(green), and the substantia nigra (black ? just posterior to the peduncles. Between the substantia nigra and the aqueduct is an area of the midbrain called the tegmentum (floor of the midbrain) The posterior end of the midbrain, posterior to the aquedct and behind the thin purple line is the tectum (roof) and it houses the colliculi (purple) .
Courtesy Ashley Davidoff MD copyright 2010 all rights reserved 94074b09b05b.83s
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The anterior border iof the midbrain incorporates the cerbral peduncles(green), and the substantia nigra (black ? just posterior to the peduncles. Between the substantia nigra and the aqueduct is an area of the midbrain called the tegmentum (floor of the midbrain) The posterior end of the midbrain, posterior to the aquedct and behind the thin purple line is the tectum (roof) and it houses the colliculi (purple) .
Courtesy Ashley Davidoff MD copyright 2010 all rights reserved 94074b09b05b.83s
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Basic Divisions of the Midbrain
Tegmentum and Tectum
Cerebral Peduncles, Cerebral Crura and Colliculli
The midbrain consists of a larger anterior portion consisting of the cerebral peduncles, (green) the substantia nigra (black) and the tegmentum (light orange) that extends to the aqueduct (thin gray line) The posterior portion called tectum (orange) contains the colliculi (purple) which are the most posterior portions of the midbrain. brain anatomy neuroanatomy midbrain tegmentum colliculi tectum cerebral peduncle aqueduct of Sylvius conceptual diagram MRI principles
Image provided by Philips Medical Systems Enhanced by Davidoff art Courtesy Ashley Davidoff MD 92141.3kb01ba02b02.8s
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Basic Divisions of the Midbrain
Tegmentum and Tectum
Cerebral Peduncles, Cerebral Crura and Colliculli
The midbrain consists of a larger anterior portion consisting of the cerebral peduncles, (green) the substantia nigra (black) and the tegmentum (light orange) that extends to the aqueduct (thin gray line) The posterior portion called tectum (orange) contains the colliculi (purple) which are the most posterior portions of the midbrain. brain anatomy neuroanatomy midbrain tegmentum colliculi tectum cerebral peduncle aqueduct of Sylvius conceptual diagram MRI principles
Image provided by Philips Medical Systems Enhanced by Davidoff art Courtesy Ashley Davidoff MD 92141.3kb01ba02b02.8s
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The midbrain consists of a larger anterior portion consisting of the cerebral peduncles, (green) the substantia nigra (black) and the tegmentum (light orange) that extends to the aqueduct (thin gray line) The posterior portion called tectum (orange) contains the colliculi (purple) which are the most posterior portions of the midbrain. brain anatomy neuroanatomy midbrain tegmentum colliculi tectum cerebral peduncle aqueduct of Sylvius conceptual diagram MRI principles
Image provided by Philips Medical Systems Enhanced by Davidoff art Courtesy Ashley Davidoff MD 92141.3kb01ba02b02.8s
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The midbrain consists of a larger anterior portion consisting of the cerebral peduncles, (green) the substantia nigra (black) and the tegmentum (light orange) that extends to the aqueduct (thin gray line) The posterior portion called tectum (orange) contains the colliculi (purple) which are the most posterior portions of the midbrain. brain anatomy neuroanatomy midbrain tegmentum colliculi tectum cerebral peduncle aqueduct of Sylvius conceptual diagram MRI principles
Image provided by Philips Medical Systems Enhanced by Davidoff art Courtesy Ashley Davidoff MD 92141.3kb01ba02b02.8s
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Basic Divisions of the Midbrain
Tegmentum and Tectum
Cerebral Peduncles, Cerebral Crura and Colliculli
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Basic Divisions of the Midbrain
Tegmentum and Tectum
Cerebral Peduncles, Cerebral Crura and Colliculli
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Basic Parts of the Midbrain
The midbrain consists of a larger anterior portion called the cerebral peduncles incorporated into the tegmentum or floor of the midbrain (orange ). The posterior portion is called tectum or the roof (yellow/orange) The tegmentum and tectum are separated by the aqueduct of Sylvius (black)
Image provided by Philips Medical Systems Enhanced by Davidoff art Courtesy Ashley Davidoff MD 92141.3kb01bab02.8s
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Basic Parts of the Midbrain
The midbrain consists of a larger anterior portion called the cerebral peduncles incorporated into the tegmentum or floor of the midbrain (orange ). The posterior portion is called tectum or the roof (yellow/orange) The tegmentum and tectum are separated by the aqueduct of Sylvius (black)
Image provided by Philips Medical Systems Enhanced by Davidoff art Courtesy Ashley Davidoff MD 92141.3kb01bab02.8s
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The midbrain consists of a larger anterior portion called the cerebral peduncles incorporated into the tegmentum or floor of the midbrain (orange ). The posterior portion is called tectum or the roof (yellow/orange) The tegmentum and tectum are separated by the aqueduct of Sylvius (black)
Image provided by Philips Medical Systems Enhanced by Davidoff art Courtesy Ashley Davidoff MD 92141.3kb01bab02.8s
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The midbrain consists of a larger anterior portion called the cerebral peduncles incorporated into the tegmentum or floor of the midbrain (orange ). The posterior portion is called tectum or the roof (yellow/orange) The tegmentum and tectum are separated by the aqueduct of Sylvius (black)
Image provided by Philips Medical Systems Enhanced by Davidoff art Courtesy Ashley Davidoff MD 92141.3kb01bab02.8s
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Basic Parts of the Midbrain
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Midbrain (mb) Tectum (t) and Tegmentum (tg)
Connecting the Forebrain with the Hindbrain
The midsagittal section view of brain reveals the distinctive shape position and character of the midline structures of the brain. The distinction between the character of the cerebral cortex which has a creamy color and the white matter exemplified by the corpus callosum (c) and septum pellucidum (sp) which are white, and the midbrain (mb) with the tegmentum anteriorly (tg) and the tectum (t) posteriorly. The pons (p) and medulla (m) which are off white are part of the hindbrain The cerebellum (c) aso part of the hindbrain is light salmon pink. The relative sizes of the forebrain, midbrain and hindbrain and their components are well appreciated in this section.
Image Courtesy of Thomas W.Smith, MD; Department of Pathology, University of Massachusetts Medical School. 97805b03
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Midbrain (mb) Tectum (t) and Tegmentum (tg)
Connecting the Forebrain with the Hindbrain
The midsagittal section view of brain reveals the distinctive shape position and character of the midline structures of the brain. The distinction between the character of the cerebral cortex which has a creamy color and the white matter exemplified by the corpus callosum (c) and septum pellucidum (sp) which are white, and the midbrain (mb) with the tegmentum anteriorly (tg) and the tectum (t) posteriorly. The pons (p) and medulla (m) which are off white are part of the hindbrain The cerebellum (c) aso part of the hindbrain is light salmon pink. The relative sizes of the forebrain, midbrain and hindbrain and their components are well appreciated in this section.
Image Courtesy of Thomas W.Smith, MD; Department of Pathology, University of Massachusetts Medical School. 97805b03
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The midsagittal section view of brain reveals the distinctive shape position and character of the midline structures of the brain. The distinction between the character of the cerebral cortex which has a creamy color and the white matter exemplified by the corpus callosum (c) and septum pellucidum (sp) which are white, and the midbrain (mb) with the tegmentum anteriorly (tg) and the tectum (t) posteriorly. The pons (p) and medulla (m) which are off white are part of the hindbrain The cerebellum (c) aso part of the hindbrain is light salmon pink. The relative sizes of the forebrain, midbrain and hindbrain and their components are well appreciated in this section.
Image Courtesy of Thomas W.Smith, MD; Department of Pathology, University of Massachusetts Medical School. 97805b03
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The midsagittal section view of brain reveals the distinctive shape position and character of the midline structures of the brain. The distinction between the character of the cerebral cortex which has a creamy color and the white matter exemplified by the corpus callosum (c) and septum pellucidum (sp) which are white, and the midbrain (mb) with the tegmentum anteriorly (tg) and the tectum (t) posteriorly. The pons (p) and medulla (m) which are off white are part of the hindbrain The cerebellum (c) aso part of the hindbrain is light salmon pink. The relative sizes of the forebrain, midbrain and hindbrain and their components are well appreciated in this section.
Image Courtesy of Thomas W.Smith, MD; Department of Pathology, University of Massachusetts Medical School. 97805b03
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Connecting the Forebrain with the Hindbrain
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Connecting the Forebrain with the Hindbrain
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The Tegmentumum (mesencephalon) in Context
Part of the Mesencephalon
The basic and simplest classification of the brain into forebrain midbrain and hindbrain is shown in this diagram and advanced to a more complex tree using the embryological and evolutionary terminologies.
The midbrain or mesencephalon and the Tectum is depicted in a salmon orange.
The forebrain consists of the cerebrum also called the prosencephalon, which contains the more advanced form of the brain and the thalamic structures which contain more basic structures. The cerebrum (telencephalon) itself consists of two cerebral hemispheres and paired basal ganglial structures. Each cerebral hemisphere will have gray and white matter distributed in the frontal parietal temporal and occipital lobe, with the basal ganglia being part of the gray matter deep in the cerebral hemispheres. The most important thalamic structures arising from the diencephalons include the thalamus itself and the hypothalamus. The midbrain (mesencepaholon) consists of the tectum tegmentum and cerebral peduncles. The hindbrain has two major branch points based on the evolutionary development. The pons and cerebellum(part of the metencephalon) are grouped and the medulla (part of the myelencephalon is the second branch.
Courtesy Ashley Davidoff MD Copyright 2010 All rights reserved 97686.8s
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The Tegmentumum (mesencephalon) in Context
Part of the Mesencephalon
The basic and simplest classification of the brain into forebrain midbrain and hindbrain is shown in this diagram and advanced to a more complex tree using the embryological and evolutionary terminologies.
The midbrain or mesencephalon and the Tectum is depicted in a salmon orange.
The forebrain consists of the cerebrum also called the prosencephalon, which contains the more advanced form of the brain and the thalamic structures which contain more basic structures. The cerebrum (telencephalon) itself consists of two cerebral hemispheres and paired basal ganglial structures. Each cerebral hemisphere will have gray and white matter distributed in the frontal parietal temporal and occipital lobe, with the basal ganglia being part of the gray matter deep in the cerebral hemispheres. The most important thalamic structures arising from the diencephalons include the thalamus itself and the hypothalamus. The midbrain (mesencepaholon) consists of the tectum tegmentum and cerebral peduncles. The hindbrain has two major branch points based on the evolutionary development. The pons and cerebellum(part of the metencephalon) are grouped and the medulla (part of the myelencephalon is the second branch.
Courtesy Ashley Davidoff MD Copyright 2010 All rights reserved 97686.8s
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The basic and simplest classification of the brain into forebrain midbrain and hindbrain is shown in this diagram and advanced to a more complex tree using the embryological and evolutionary terminologies.
The midbrain or mesencephalon and the Tectum is depicted in a salmon orange.
The forebrain consists of the cerebrum also called the prosencephalon, which contains the more advanced form of the brain and the thalamic structures which contain more basic structures. The cerebrum (telencephalon) itself consists of two cerebral hemispheres and paired basal ganglial structures. Each cerebral hemisphere will have gray and white matter distributed in the frontal parietal temporal and occipital lobe, with the basal ganglia being part of the gray matter deep in the cerebral hemispheres. The most important thalamic structures arising from the diencephalons include the thalamus itself and the hypothalamus. The midbrain (mesencepaholon) consists of the tectum tegmentum and cerebral peduncles. The hindbrain has two major branch points based on the evolutionary development. The pons and cerebellum(part of the metencephalon) are grouped and the medulla (part of the myelencephalon is the second branch.
Courtesy Ashley Davidoff MD Copyright 2010 All rights reserved 97686.8s
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The basic and simplest classification of the brain into forebrain midbrain and hindbrain is shown in this diagram and advanced to a more complex tree using the embryological and evolutionary terminologies.
The midbrain or mesencephalon and the Tectum is depicted in a salmon orange.
The forebrain consists of the cerebrum also called the prosencephalon, which contains the more advanced form of the brain and the thalamic structures which contain more basic structures. The cerebrum (telencephalon) itself consists of two cerebral hemispheres and paired basal ganglial structures. Each cerebral hemisphere will have gray and white matter distributed in the frontal parietal temporal and occipital lobe, with the basal ganglia being part of the gray matter deep in the cerebral hemispheres. The most important thalamic structures arising from the diencephalons include the thalamus itself and the hypothalamus. The midbrain (mesencepaholon) consists of the tectum tegmentum and cerebral peduncles. The hindbrain has two major branch points based on the evolutionary development. The pons and cerebellum(part of the metencephalon) are grouped and the medulla (part of the myelencephalon is the second branch.
Courtesy Ashley Davidoff MD Copyright 2010 All rights reserved 97686.8s
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The Tegmentumum (mesencephalon) in Context
Part of the Mesencephalon
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The Tegmentumum (mesencephalon) in Context
Part of the Mesencephalon
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