Brainstem and cranial nerves Flashcards
What 3 structures make up the brainstem?
Midbrain
Pons
Medulla oblongata
What is the ventral aspect of the midbrain divided into?
Dorsal tectum and ventral tegmentum
Where does the pons lie?
Between the medulla and the midbrain
Where does the medulla oblongata begin?
Foramen magnum
What is the bulbopontine sulcus?
A transverse groove at the cuadal border of the pons
What is the basillar sulcus?
A shallow sulcus in which the basillar artery lies
What is the middle cerebellar peduncle?
Lateral extensions of neural tissue from pons to cerebellum
What are the 4 cranial nerve that originate from the ventral surface of the pons?
CV V- trigeminal
CNVI- abducens
CN VII- facial
CNVIII- vestibulocochlear
What is the anterior median fissure?
Partial division of medulla in the ventral midline
Where are the pyramid located?
on the ventral surface of the medulla
What is a pyramid (located on the medulla)?
Elongated eminence between the anterior median fissure and the corticospinal tract
What does the pyramid mark out that is deep?
underlying fibres passing from the cerebral hemispheres to the cord
What is the dessusation of the pyramid?
Diagonally oriented bundles of fibres crossing the fissure to enter the opposite lateral column of the spinal cord
What is the olive?
eminence located lateral to the ventrolateral sulcus caused by the presence of underlying inferior olivary nucleus
What is the olive concerned with?
Control of movement
