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Diencephalon |
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http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#Diencephalon |
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Diencephalon |
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Trancred 2005 The Diencephalon, which consists of the thalamus, hypothalamus, epithalamus and subthalamus, is involved many functions including sensory processing, motor control and maintenance of homeostasis. Structures: Epithalamus Fornix Hypothalamus Internal Capsule Lamina Terminalis Lateral Ventricle Mammillary Body Midbrain Optic Chiasm Optic Tract Posterior Commissure Subthalamus Telencephalon Thalamus Third Ventricle Information: Diencephalon Location and Relations: The diencephalon lies intermediate between the midbrain (posteriorly) and the telencephalon (which covers it laterally and anteriorly). It extends from lamina terminalis (anteriorly) to a line drawn between the posterior commissure and the posterior border of the mammillary bodies (posteriorly). On its dorsal surface it is covered by the fornix medially and the lateral ventricles further laterally. Its lateral surface is covered by a huge mass of white matter called the internal capsule. Its ventral surface is covered anteriorly and laterally by the optic chiasm and tracts. Its medial surface forms the lateral wall and floor of the third ventricle. Components: (i) the (dorsal) thalamus - occupies 80% of the diencephalon. It is the main relay station en route to the cortex for all sensory systems except olfaction (smell) and it plays an important role in coordinating and regulating levels of activity in the cerebral cortex, through its involvement in the reticular activating system. (ii) The hypothalamus - separated from the thalamus by the hypothalamic sulcus. It functions to coordinate visceral activity throughout the body. (iii) The epithalamus - which lies on the medial side of the thalamus, which plays an important role in the regulation of circadian rhythms. (iv) The subthalamus - which lies intermediate between the thalamus and midbrain and is not seen in sagittal section. It has an important motor function. |
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http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#Brain_Structure |