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===Crura cerebri===
 
===Crura cerebri===
 
These are visible on the ventral surface of the mid brain and comprise of fibre tracts that are in passage between the telencephalon and the brain stem. The oculomotor nerves (see above) also emerge in this region of the mid brain, directly rostral to the pons.
 
These are visible on the ventral surface of the mid brain and comprise of fibre tracts that are in passage between the telencephalon and the brain stem. The oculomotor nerves (see above) also emerge in this region of the mid brain, directly rostral to the pons.
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==Structure and Function==
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{| style="width:75%; height:200px" border="1"
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!
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!'''Structures Present'''
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!'''Function'''
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|-
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| '''Midbrain (Mesencephalon)'''
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| '''[[#Colliculi|Colliculi]]'''
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'''[[#Occulomotor Nuculi|Occulomotor Nuculi]]'''
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| '''[[#Colliculi|Colliculi]]''' - Processing visual and auditory information.
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'''[[#Occulomotor Nuculi|Occulomotor Nuculi]]''' - Eyeball mm., more cranial nerves.
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|}
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===Colliculi===
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===Oculomotor Nuclei===
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*See [[CNS Vasculature - Anatomy & Physiology|blood suppply to the brain]] and the [[CNS Vasculature - Anatomy & Physiology#Species Differences|relevent species differences.]]
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*The cerebral (mesencephalic) aqueduct is a ventricular tube running through the midbrain which connects the third and fourth ventricles. It contains [[Cerebral Spinal Fluid - Anatomy & Physiology|cerebral spinal fluid]] which offer it immunological protection.
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See [[Immunology|immunology]].
      
==Species Differences==
 
==Species Differences==
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