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  • The cerebral aqueduct, which is surrounded by gray matter, separates the  Option: 1 tegmentum from the c

The cerebral aqueduct, which is surrounded by gray matter, separates the

 

Option: 1

tegmentum from the crus cerebri

 


Option: 2

tegmentum from the tectum

 


Option: 3

brainstem and spinal cord.

 


Option: 4

Crus cerebri from the tectum

 


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.

Therefore, the cerebral aqueduct, which is surrounded by gray matter, separates the tegmentum from the tectum. Hence, the correct answer is option b.

Posted by

himanshu.meshram

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