Midbrain

 

The midbrain is dwarfed by other structures in the neuraxis. It contains the following parts-

bullet

Ventral crus cerebri which carries the pyramidal tract from the forebrain.

bullet

 Dorsal to the crus cerebri is the midbrain tegmentum. The most dorsal part of the midbrain is the tectum. This is called tectum opticum in lower animals, especially the reptiles to emphasize the role in visual reflexes. In man it contains or mediates both visual and auditory reflexes. It also contains two structures  

bullet

1.              Superior colliculus

bullet

2.              Inferior colliculus

The midbrain tegmentum also contains the nuclei of two important cranial nerves. They are

bullet

Oculomotor

bullet

Trochlear nerve

The level of the superior colliculus is the same level of the oculomotor nucleus while the level of the trochlear nerve has the Inferior colliculus. The trochlear is the only cranial nerve that issues from the dorsal aspect of the brain. It then passes around the lateral aspect of the brain stem in  order to appear in the ventral aspect of the brain and enter the cavernous sinus.

Advanced

Brain dissector

There is nothing in anatomy not found in this website

Electronic School of Medicine
Creator: Oluwole Ogunranti

                    
Brainstem Thalamus Forebrain Medulla Midbrain Pons
Temporal lobe Basal ganglia Epithalamus Cerebral operculum Remove operculum Wall of lateral ventricle 1
Wall of lateral ventricle 2 Wall of lateral ventricle 3 Lateral ventricle 1 Lateral ventricle 2 Base Rhomboid fossa


                      

 

 


Brain function

Neuro movie

 

 

 

Cell Biology
Histology
Embryology
Gross anatomy
Lymphatic drainage
Organ integration
Clinical anatomy

Quiz

Dissector

Physiology

Biochemistry

Chemical Pathology

Anatomical Pathology

Pharmacology

Imaging

Medicine

Surgery
 

Main Subject Course Links

eAnatomy eAnesthesia eBiochemistry eChemical pathology eCommunity Health
eDermatology eENT eGynecology eHematology eImaging
eMedicine eMedical microbiology eObstetrics eOphthalmology ePathology
ePediatrics ePharmacology ePhysiology ePsychiatry    eSurgery/eOrthopedics
eLab eOSCE eProcedures eInvestigations eSchool/Videopage
eOrgans eLocator Anatomy Museum eDissector eFractures/Dissect-it-yourself
All diseases eClerking eTreatment eDoctor ePatient