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  •  The most dorsal part of the midbrain is called the  Option: 1 Tectum  &nb

 The most dorsal part of the midbrain is called the

 

Option: 1

Tectum 

 


Option: 2

Crus cerebri

 


Option: 3

Tegmentum

 


Option: 4

Tegmentum

 


Answers (1)

best_answer

 

 

As we have learnt in:

Midbrain or Mesencephalon

  • The midbrain connects cerebral hemispheres with cerebellum. 
  • The midbrain lies between the pons of hindbrain and the forebrain.
  • The most dorsal part of the midbrain is called the tectum. 
  • It is sometimes referred to as the corpora quadrigemina, which means "four bodies".
  • It is made up of one pair is called superior colliculi and the other pair is called inferior colliculi.
  • The ventral part is referred to as the crus cerebri. 
  • It includes massive bundles of fibers that pass from the cerebral cortex to the brainstem and spinal cord.
  • Cerebral peduncles (Crura cerebri) or tegmentum are two bundles of fibres which lie on the lower or inferior surface of the midbrain.
  •  A cell group called the substantia nigra separates the tegmentum from the crus cerebri. 
  • The cerebral aqueduct, which is surrounded by gray matter, separates the tegmentum from the tectum.
     

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Therefore, the most dorsal part of the cerebrum is called tectum. Hence, the correct answer is option a. 

 

Posted by

sudhir.kumar

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