loading...| Preferred Name | Midbrain | |
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http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#Midbrain |
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Midbrain |
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Trancred 2005 The Midbrain (Mesencephalon) contains the nuclei of cranial nerves III and IV, as well as nuclei associated with motor and autonomic control, and visual and auditory reflexes. Structures: Cerebral Aqueduct Corticobulbar Tract Corticopontine Tract Corticospinal Tract Crus Cerebri Diencephalon Edinger-Westphal Nucleus Inferior Colliculus Lateral Lemniscus Medial Lemniscus Medial Longitudinal Fasciculus Mesencephalic Nucleus of CN V Mesencephalon Oculomotor Nucleus Periaqueductal Gray Pons Red Nucleus Spinothalamic Tract Substantia Nigra Superior Cerebellar Peduncle Superior Colliculus Tracts of the Midbrain Trigeminothalamic Tract Information: The midbrain (mesencephalon) is the most rostral part of the brainstem and lies between the pons and the diencephalon. It consists of a tectum, which is located dorsal to the cerebral aqueduct, and paired cerebral peduncles, each of which is demarcated into a tegmentum and a crus cerebri by a pigmented region known as the substantia nigra. The tegmentum is located between the cerebral aqueduct and the substantia nigra. The crus cerebri, which is also known as the basis pedunculi, is formed by 2 large masses of white matter on the ventral surface of the midbrain. The tectum is formed rostrally by the paired superior colliculi and caudally by the paired inferior colliculi. The midbrain tegmentum contains several large gray masses including the periaqueductal gray, red nuclei, substantia nigra and several cranial nerve nuclei (oculomotor, Edinger-Westphal, and mesencephalic nucleus of CN V). The tegmentum also contains several tracts including the medial lemniscus, spinothalamic and trigeminothalamic tracts, lateral lemniscus and medial longitudinal fasciculus as well as the decussation of the superior cerebellar peduncle The crus cerebri contain corticobulbar, corticospinal and corticopontine tracts. Major tracts present in the midbrain are listed on a separate card (tracts of the midbrain) |
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http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#Brain_Structure |